Bar chart options

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Plot menu options
Series menu options
Values menu options
X menu options
Y menu options


Bar charts are useful for showing comparisons between categories of data, or for comparing changes for multiple groups over the same time period.

Building a bar chart

Bar chart visualizations require one of the following combinations of fields in the Data section:

  • At least one unpivoted dimension and at least one measure.

  • Exactly one pivoted dimension, at least one measure, and exactly one optional, unpivoted dimension. Bar charts with a pivoted dimension and more than one other dimension will not render.

  • Exactly one numeric dimension, defined in LookML as a dimension of type: number, and exactly one other dimension. The numeric dimension must be ordered before the other dimension in the Data section.

This page describes the options for editing bar charts in the visualization menu. This menu can be accessed by clicking the gear in the upper right corner of the visualization tab.

Some of the options listed below may be grayed out or hidden in situations where they would conflict with other settings you have chosen.

Plot menu options

Series Positioning

Series Positioning specifies how series are clustered visually on a chart. The following options are available. Not all options apply to all chart types.

  • Grouped: For column and bar charts. Series are clustered side-by-side.

  • Overlay: For scatterplot, line, and area charts. Series are overlaid on the chart.

  • Stacked: Series values are added on the y-axis, so each consecutive series appears above the last. Be sure that the units of all series match.

  • Stacked Percentage: Series values are presented as percentages stacked on the y-axis, where all values add up to 100%.

Grid layout

Grid Layout provides options to separate, or trellis, a chart into several smaller charts, each representing a single row or pivot from the results table.

You can separate a chart into a maximum of 12 smaller charts. If you have more than 12 rows or pivots, limit your data by using the Row LimitColumn Limit, or Limit Displayed Rows options.

Once you select By Pivot or By Row from the drop-down menu, the Number of Charts per Row option appears. You can input a number between 1 and 12. If you do not input a number, Centricity will arrange the charts as evenly as possible.

Grid layout is responsive to the dashboard tile size and shape, as long as Number of Charts per Row is not set. Additionally, when a bar chart using a By Pivot grid layout is added to a dashboard, and the smaller charts share the same x-axis, only the charts on the bottom of the visualization will show the axis values, to aid in comparison across charts.

Sort Stacks

Sort Stacks enables you to order each slice of a stacked or stacked percentage chart by the size of each slice. There are three different ways to order stacked charts:

  • Default: Series values are ordered according to their position in the data table.

  • Ascending: Smallest series values are positioned at the bottom, with values decreasing in size toward the top.

  • Descending: Largest series values are positioned at the bottom, with values increasing in size toward the top.

Sort Stacks is only available with Series Positioning set to Stacked or Stacked Percentage.

Inner Spacing

Inner Spacing sets the spacing between columns within a group. This is available for charts that have Series Positioning Grouped. This parameter accepts values between 0 and 1. 0 is associated with minimum spacing between columns within a group, and 1 is associated with maximum spacing between columns within a group.

Spacing

Spacing sets the spacing between column groups. This parameter accepts values between 0 and 1. 0 is associated with minimum spacing between column groups, and 1 is associated with maximum spacing between column groups.

Hide Legend

Hide Legend toggles the appearance of the series legend on a chart. This is only available when there is more than one series (except in the case of a pie chart).

Legend Align

Legend Align specifies whether the series legend will appear to the left, center, or right of the chart. This is only available when Hide Legend is off, and when there is more than one series.

Limit Displayed Rows

Limit Displayed Rows enables you to show or hide rows in a visualization, based on their position in the results. For example, if your visualization was displaying a 7-day rolling average, you may want to hide the first 6 rows.

Click Limit Displayed Rows to enable or disable this feature. Once enabled, you can specify the following options:

  • Hide or Show: Choose Hide to exclude certain rows from the visualization. Choose Show to display only a limited number of rows in the visualization.

  • First or Last: Choose if the rows to be hidden or shown will be the first or last rows in the result set.

  • Number: Specify the number of rows to be hidden or shown.

In the Data section below your visualization, any excluded rows will be shown in a darker color, and will be marked with a symbol to the left of the row number.

This option is dependent on the row order, so changing the query's sort order or adding a row limit can change the rows that are shown or hidden in the visualization.

Series menu options

The series menu controls how your chart shows each data series.

Colors

You can define the color palette for a chart in the Colors section.

Collection

Choose a color collection from the Collection drop-down menu. A collection allows you to create themed visualizations and dashboards that look good together. Your Centricity admin may also create a custom color collection for your organization.

Once you select the color collection, the Palette section will update with a palette from that collection.

Palette

Once you've selected a color collection, you can choose a different palette from the collection, or customize your palette, by clicking the color palette itself. This opens the palette picker and displays all the palettes from the collection.

Colors are assigned to each series in order. For a categorical palette, the first color in the palette is assigned to the first series, and so on. For a sequential or diverging palette, the color at the left end of the palette is assigned to the first series and the colors for each remaining series move to the right on the palette. If your query returns more data series than colors listed, the colors repeat from the beginning of the palette, first as a lighter version of each color, then as a darker version of each color.

Creating a custom color palette

To create a custom color palette, first select the Custom tab on the palette picker. You can edit your palette in several ways.

  1. Click on one of the colors present to edit it.

  2. Click the + or - buttons below the color palette to add a color to the end of the palette or remove a selected color.

  3. Click EDIT ALL at the bottom right of the menu to use a comma-separated list of color values.

To change a selected color, or edit all colors at once, you can input hex strings, such as #2ca6cd, or CSS color names, such as mediumblue, into the color value box at the bottom of the picker.

You can also click the color wheel to the right of the color value box to bring up a color picker, which can be used to select a color. The corresponding hex value for that color appears in the color value box.

If you click EDIT ALL, you'll see that the color value box is populated with the hex codes of the color palette you've chosen or customized. Copying and pasting this list is the best way to copy custom color palettes from one chart to another.

Reverse colors

Select Reverse colors to reverse the palette. For a categorical palette, this would apply the last color in the palette to the first series, the second-to-last color in the palette to the second series, and so on. For a sequential or diverging palette, this would apply the color at the right end of the palette to the first series and move left on the palette for the remaining series.

Show Full Field Name

Show Full Field Name determines whether to show the view name along with the field name for each axis title and series name. When Show Full Field Name is turned off, generally only the field name shows; however, measures of type count display only the view name instead.

Customizations

Each series in the chart can be customized in several different ways.

  1. Click the arrow next to a series to expand its options.

  2. Click on the color swatch to select a custom color for the series. This overrides the color palette defined by the Colors option.

  3. Enter a custom series label if desired. This impacts the chart legend and tooltips.

  4. Select a different visualization type for the series if desired. This is useful if you want to combine different visualization types on the same chart, such as showing one series as columns and another series as a line.

  5. For line, area, or scatter series types, select the shape of the chart points.

Values menu options

Value Labels

Value Labels toggles the appearance of value labels for each data point on a chart.

Label Null Columns

Label Null Columns toggles the appearance of labels for null data points.

Totals Labels

Totals Labels toggles the appearance of totals for each stacked group of data points on a chart. Totals Labels is only available with Series Positioning Stacked.

Show Silhouette of Disabled Series

Show Silhouette of Disabled Series toggles a lightly-shaded representation of a disabled series in a stacked chart. Click on a series name in the bottom legend of the visualization to disable or enable the series in the visualization. Show Silhouette of Disabled Series is only available with Series Positioning Stacked.

Totals Color

Totals Color defines the color of the totals labels. Click on the color swatch to scroll through color palettes or select a custom color for the totals labels. Totals Color is only available when Series Positioning is set to Stacked.

Value Colors

Value Colors defines the colors of the value labels. This field takes a comma-separated list of one or more color values. The color values can be formatted as RGB hex strings, such as #2ca6cd, or as CSS color names, such as mediumblue.

If set to multiple colors, colors will be assigned to each series in order. The first series in the underlying table will be assigned the first color, and so on. If the query returns more data series than colors listed, Centricity will assign the series color to the value label after it runs out of your custom colors.

If no color values are provided, Centricity assigns the series color to the value label.

Font Size

Font Size sets the font size of value labels using any valid CSS size. Generally users will specify a number of pixels, such as 10px or 12px.

Value Rotation

Value Rotation sets the rotation of the value labels. This parameter accepts values between -360 and 360, denoting the number of degrees to rotate the labels. Value Rotation is only available with Series Positioning Grouped or Overlay.

Totals Rotation

Totals Rotation sets the rotation of the totals labels. This parameter accepts values between -360 and 360, denoting the number of degrees to rotate the labels. Totals Rotation is only available with Series Positioning Stacked.

Value Format

Value Format specifies the format of the value, independent of the underlying dimension or measure. The field accepts Excel-style formatting. If no formatting is specified, the value will be displayed in the format of the underlying dimension or measure.

You can read Excel's complete guide about how to specify these formats in their documentation. However, color formatting is not currently supported in Centricity.

X menu options

Scale Type

Scale Type specifies how the x-axis scale is calculated and displayed. The following options are available.

  • Automatic Based on Data: The scale will be inferred from the underlying data. This is the default setting.

  • Ordinal: The data is plotted along the x-axis as evenly-spaced, discrete entries, regardless of relative distance between data points.

  • Time: The data is plotted as time values. The x-axis is labeled with appropriate time increments.

Reverse Axis

Reverse Axis toggles the direction of the x-axis. When this is off, values increase from left to right. When this is on, values decrease from left to right.

Show Axis Name

Show Axis Name toggles the appearance of the x-axis name label.

Custom Axis Name

Custom Axis Name sets the name for the x-axis. It accepts any string value. This option is only available when Show Axis Name is ON.

Axis Value Labels

Axis Value Labels toggles the appearance of value labels on the x-axis.

Gridlines

Gridlines toggles the appearance of gridlines extending from the x-axis. Gridlines are spaced based on the scaling of the x-axis.

Label Rotation

Label Rotation sets the rotation of the x-axis value labels. This parameter accepts values between -360 and 360, denoting the number of degrees to rotate the labels.

Time Label Format

Time Label Format specifies how x-axis value labels are displayed for charts with a time dimension on the x-axis. This parameter accepts time formatting syntax, as shown below.

  • %b '%y, %H:%M displays Aug '14, 22:31

  • %B %Y, %I:%M %p displays August 2014, 10:31 PM

  • %x %X displays 12/15/2014 10:31:00

  • %I:%M:%S %p displays 10:31:00 PM

Y menu options

Gridlines

Gridlines toggles the appearance of gridlines extending from the y-axis. Gridlines are spaced based on the scaling of the y-axis.

Reverse Axis

Reverse Axis toggles the direction of the y-axis. When this is off, values increase going up the axis. When this is on, values decrease going up the axis.

Top Axes and Bottom Axes

The Top Axes and Bottom Axes sections let you configure the chart’s y-axes. The example below shows a chart with three y-axes, two on the bottom and one on the top, each on a different scale:

On the top and bottom of the chart, you can have one or more y-axes, each associated with one or more data series. Each data series is based on a measure, even if the measure has been pivoted. Table calculations that use a measure are listed as a data series and can be moved to another axis.

Benefits of specifying axes

Using this functionality, any chart can:

  • Combine arbitrary series in any number of axes

  • Split pivoted series across various axes by measure

  • Render top and bottom axes in rotated charts

  • Render charts with various measure types so long as they are not combined (such as linear and log)

  • Render log charts with values between 0 and 1

Each y-axis has its own set of configuration options and displays one or more data series on a scale relative to that y-axis.

Special cases for specifying axes

Each measure goes on one axis. If you have a measure pivoted, all of its pivoted values go on the same axis. If you want to specify the axis for a particular measure for each pivot, then use filtered measures instead. Create a filtered measure for each possible value (and maybe one more for any unanticipated values). Then you can specify which axis to use for each of your new measures.

Charts with the Series Positioning option set to Grouped or Overlay can have multiple y-axes. Any Stacked or Stacked Percentage charts will have one stacked data series and one y-axis.

Assigning, removing, and changing axes

To assign a data series to a y-axis, click and drag the data series to the desired Top or Bottom Axes area. You can create a new axis or add the data series to an existing y-axis. The following example shows the Pulse Shift % data series being moved from the Bottom 1 y-axis to the Top Axes area to create a new Top 1 y-axis. A tab is created for the new Top 1 y-axis that contains configuration options for the Top 1 y-axis.

Similarly, you can remove an axis by dragging each of its data series to another y-axis.

When moving a data series to a different axis:

  • If a data series is the only series associated with an axis, and you move that series to a new axis, all of its settings are preserved, including the Axis Name.

  • If a data series is one of multiple series associated with an axis, and you move that series to a new axis, almost all of its settings are preserved, except for the Axis Name.

  • If you move a data series to an existing axis it will inherit the settings of the destination axis.

Configure Axis

The Configure Axis section displays a tab for each y-axis configured in the Top Axes and Bottom Axes sections.

Click on the tab for an axis to configure that y-axis. You configure each y-axis separately using its own set of configuration options.

Scale Type

Scale Type specifies how the y-axis scale is calculated and displayed. The following options are available. Not all options apply to all chart types.

  • Linear: The data is plotted along the y-axis as evenly-spaced, discrete entries, regardless of relative distance between data points. This is the default setting. Most data is best displayed on a linear scale.

  • Logarithmic: The data is plotted along the y-axis using a logarithmic scale, which is based on orders of magnitude. If the data has a cluster of very small and very large values, this setting enables you to see variation in the small values while also showing the larger values. The logarithmic scale type can only be used for data with positive values, and is only available when you have set Series Positioning to "Grouped" or "Overlay" on the Plot tab.

Show Axis Names

Show Axis Names toggles the appearance of y-axis name labels.

Show Axis Values

Show Axis Values toggles the appearance of y-axis values.

Unpin Axis from Zero

Unpin Axis From Zero toggles letting the chart focus on the area for which data exists, rather than showing the full scale starting at zero.

Axis Name

Axis Name lets you enter the label for the selected y-axis.

Y Axis Format

Y Axis Format specifies the number format of the y-axis values, independent of the underlying dimension or measure. The parameter accepts Excel style formatting. If no formatting is specified, the value will be displayed in the format of the underlying dimension or measure.

You can read Excel's complete guide about how to specify these formats in their documentation. However, at this time, date formatting and color formatting are not supported in Centricity.

Some of the most common formatting options are shown here:

Value Format

Meaning

#

Integer (123).

*00#

Integer zero-padded to 3 places (001).

0.##

Number up to 2 decimals (1. or 1.2 or 1.23).

0.00

Number with exactly 2 decimals (1.23).

*00#.00

Number zero-padded to 3 places and exactly 2 decimals (01.23).

#,###

Number with comma between thousands (1,234).

#,##0.00

Number with comma between thousands and 2 decimals (1,234.00).

0.000,," M"

Number in millions with 3 decimals (1.234 M). Division by 1 million happens automatically.

$#

Dollars with 0 decimals ($123).

$0.00

Dollars with 2 decimals ($123.00).

$#,##0.00

Dollars with comma between thousands and 2 decimals ($1,234.00).

#%

Percent with 0 decimals (1%). Multiplication by 100 happens automatically.

0.00%

Percent with 2 decimals (1.00%). Multiplication by 100 happens automatically.

0.00\%

Percent with 2 decimals (1.00%). Multiplication by 100 does NOT happen automatically.

Tick Density

Tick Density sets the density of tick marks on the y-axis. The following options are available:

  • Default: Sets ticks to the default density.

  • Custom: Enables you to set ticks with a custom density. Selecting this option will display a slider bar where you can set the custom density.

Minimum Value

Minimum Value defines the minimum value for the selected y-axis.

Maximum Value

Maximum Value defines the maximum value for the selected y-axis.

Add Reference Line

The Add Reference Line button enables the creation of reference lines in a chart. Click it as many times as you like to add any number of reference lines, and reveal the settings for those reference lines. To delete a reference line, click the X in the upper right of its settings.

Reference lines are applied to the first series in your query results, and ignore any hidden series. You can reorder the columns in the data table to change the series the reference line is applied to.

Type (for a reference line)

Type specifies the type of reference line to apply to the chart. The following options are available:

  • Line: A horizontal line is plotted at the y-axis value entered in the Value setting.

  • Range: A shaded range is plotted including and between the y-axis values entered in the Start Value and End Value settings.

  • Line with Margins: A horizontal line is plotted at the y-axis value entered in the Value setting. Shaded ranges are plotted above and below the horizontal line, based on the values entered in the Margin Above and Margin Below settings.

Value, Start Value, and End Value (for a reference line)

Value specifies the point on the axis to plot the reference line. You can set the value to the median, average (mean), maximum, or minimum for the data returned in your query results. You can also select Custom to enter a specific value from the axis.

When Type is set to Range, the Start Value and End Value settings replace the Value setting; they accept the same types of values as Value.

Margin Above and Margin Below (for a reference line)

Margin Above and Margin Below specify the shaded ranges to plot on either side of a reference line when Type is set to Line with Margins.

You can set the margin values to the population standard deviation or population variance for your query results. You can also select Custom to enter a specific value or "min", "max", "mean", or "median" to use those calculations from your query results.

Label (for a reference line)

Enter the label that you'd like to appear on the reference line in the Label field. You can also use the following calculations, embedded in double curly brackets {{ }}, in the Label field:

  • median

  • mean

  • max

  • min

  • deviation (for population standard deviation)

  • variance (for population variance)

For example, you could enter "Average: {{mean}}" to show something like Average: 123.4.

If you leave the Label field blank, the value of the line will appear on the reference line.

Label Position (for a reference line)

You can position the reference line label at the left of the chart, the right of the chart, or in the center, by selecting one of those options under Label Position.

Color (for a reference line)

Color enables you to specify the color of the reference line in a chart.

Click the color box to reveal a palette picker that you can scroll through to choose a color. To choose a custom color, select the Custom tab on the palette picker and use the color picker that appears, or enter a hex string or CSS named color string into the color value box.

Value Format (for a reference line)

Add custom formatting to the value shown in the reference line label with the Value Format field.

You can use Excel-style formatting to format the label value.

Add Trend Line

Your Centricity admin must enable the Trend Lines feature for this option to be available.

The Add Trend Line button enables the creation of trend lines in a chart. Click it as many times as you like to add any number of trend lines, and reveal the settings for those trend lines. To delete a trend line, click the X in the upper right of its settings.

The trend line feature ignores any NULL values in your data and extrapolates the trend line based on the previous non-NULL values. This may lead to misleading trend lines. You can use a table calculation to create a trend line that treats NULL values as 0.

Trend Type

For bar charts, the x axis and y axis are reversed.

Trend Type specifies the type of trend line to apply to the chart. The following options are available:

  • Linear: A linear trend line plots a straight line that best fits the data. It is often used when the values are increasing or decreasing at a fairly steady rate. Your data can have negative and/or positive values.

    For those who are interested, the equation that governs a linear trend line is y = a + bx.

  • Exponential: An exponential trend line treats the y-variable as an exponential function of the x-variable. It is typically used when y-values exponentially rise or fall. You cannot use this option if your y-variable includes zero or negative values.

    For those who are interested, the equation that governs an exponential trend line is y = aebx.

  • Logarithmic: A logarithmic trend line plots the y-variable as a logarithmic function of the x-variable (which is based on orders of magnitude). It is typically used when the rate of change in the y-variable increases or decreases quickly and then levels out. The line will be curved on a linear scale and a straight line on a logarithmic scale. You set the type of scale using the Scale Type option. You cannot use this option if your x-variable includes zero or negative values.

    For those who are interested, the equation that governs a logarithmic trend line is y = a + b * ln(x)

  • Moving Average: The data is plotted along the y-axis as a moving average, also called a rolling average. It is typically used to smooth out minor fluctuations and show an overall trend more clearly. Each point on the moving average trend line is the average value of the previous data points. The number of previous data points to include can be specified with the Period setting. For example, if you apply a trend line to Daily Sales, and the period is set to 7, then for a given date, the Moving Average plots the average sales for the 7-day period ending that date. In the case where the number of previous data points is less than the period setting, the moving average will be calculated over the partial periods, but is rebased to the number of available data points.

Period (for a trend line)

Period specifies the number of data points to include when calculating a moving average. Choose a Trend Type of Moving Average to reveal this setting.

Since moving averages are typically used for date-based data, the choices are 7 (for a week), 14 (for 2 weeks) and 28 (for 4 weeks).

Series Index (for a trend line)

Series Index enables you to specify which chart series should have a trend line added to it.

This option defaults to 1, the first defined series. Each series is numbered according to the order it appears in your data table.

Show Label (for a trend line)

Show Label toggles adding a descriptive label to the trend line.

Label (for a trend line)

Label specifies the label text.

Label Position (for a trend line)

Label Position specifies whether the trend line label will appear at the left edge of the trend line, the center of the trend line, or at the right edge of the trend line.

Label Type (for a trend line)

Label Type specifies the type of label to apply to the trend line. The following options are available:

  • String: Applies the text specified in the Label box to the trend line.

  • R^2: Applies a coefficient of determination label — also known as R squared — to the trend line. The R^2 label indicates the proportion of the variance in the Series Index data. It helps you understand how well the trend line matches the data, with 0 meaning no fit, 1 meaning perfect fit, and values in between indicating partial fit. This option will only work when Trend Type is set to Linear.

  • Equation: Applies a label to the trend line that shows the equation used to determine the trend line.

Color (for a trend line)

Color enables you to specify the color of the trend line in a chart.

Click the color box to reveal a palette picker that you can scroll through to choose a color. To choose a custom color, select the Custom tab on the palette picker and use the color picker that appears, or enter a hex string or CSS named color string into the color value box.