# Bar Chart

* [Supported data formats](#barchart-supporteddataformats)
  * [Visualizing time series or multiple result sets](#barchart-visualizingtimeseriesormultipleresultsets)
* [Bar chart options](#barchart-barchartoptions)
  * [Orientation](#barchart-orientation)
  * [Rotate x-axis tick labels](#barchart-rotatex-axisticklabels)
  * [X-axis tick label maximum length](#barchart-x-axisticklabelmaximumlength)
  * [Bar labels minimum spacing](#barchart-barlabelsminimumspacing)
  * [Show values](#barchart-showvalues)
  * [Stacking](#barchart-stacking)
  * [Group width](#barchart-groupwidth)
  * [Bar width](#barchart-barwidth)
  * [Bar radius](#barchart-barradius)
  * [Highlight full area on cover](#barchart-highlightfullareaoncover)
  * [Line width](#barchart-linewidth)
  * [Fill opacity](#barchart-fillopacity)
  * [Gradient mode](#barchart-gradientmode)
  * [Tooltip mode](#barchart-tooltipmode)
  * [Legend mode](#barchart-legendmode)
  * [Legend placement](#barchart-legendplacement)
  * [Legend values](#barchart-legendvalues)
  * [Legend calculations](#barchart-legendcalculations)
* [Text size](#barchart-textsize)
* [Axis](#barchart-axis)
  * [Placement](#barchart-placement)
  * [Label](#barchart-label)
  * [Width](#barchart-width)
  * [Soft min and soft max](#barchart-softminandsoftmax)

This panel visualization allows you to graph categorical data.

***

### Supported data formats <a href="#barchart-supporteddataformats" id="barchart-supporteddataformats"></a>

Only one data frame is supported and it must have at least one string field that will be used as the category for an X or Y axis and one or more numerical fields.

Example:

| Browser | Market share |
| ------- | ------------ |
| Chrome  | 50           |
| IE      | 17.5         |

If you have more than one numerical field the panel will show grouped bars.

#### Visualizing time series or multiple result sets <a href="#barchart-visualizingtimeseriesormultipleresultsets" id="barchart-visualizingtimeseriesormultipleresultsets"></a>

If you have multiple time series or tables you first need to join them using a join or reduce transform. For example if you have multiple time series and you want to compare their last and max value add the **Reduce** transform and specify **Max** and **Last** as options under **Calculations**.

***

### Bar chart options <a href="#barchart-barchartoptions" id="barchart-barchartoptions"></a>

Use these options to refine your visualization.

#### Orientation <a href="#barchart-orientation" id="barchart-orientation"></a>

* **Auto** - Algology decides the bar orientation based on what the panel dimensions.
* **Horizontal** - Will make the X axis the category axis.
* **Vertical** - Will make the Y axis the category axis.

#### Rotate x-axis tick labels <a href="#barchart-rotatex-axisticklabels" id="barchart-rotatex-axisticklabels"></a>

When the graph is vertically oriented, this setting rotates the labels under the bars. This setting is useful when bar chart labels are long and overlap.

#### X-axis tick label maximum length <a href="#barchart-x-axisticklabelmaximumlength" id="barchart-x-axisticklabelmaximumlength"></a>

Sets the maximum length of bar chart labels. Labels longer than the maximum length are truncated, and appended with `...`.

#### Bar labels minimum spacing <a href="#barchart-barlabelsminimumspacing" id="barchart-barlabelsminimumspacing"></a>

Sets the minimum spacing between bar labels.

#### Show values <a href="#barchart-showvalues" id="barchart-showvalues"></a>

This controls whether values are shown on top or to the left of bars.

* **Auto** Values will be shown if there is space
* **Always** Always show values.
* **Never** Never show values.

#### Stacking <a href="#barchart-stacking" id="barchart-stacking"></a>

Controls bar chart stacking.

* **Off**: Bars will not be stacked.
* **Normal**: Bars will be stacked on each other.
* **Percent**: Bars will be stacked on each other, and the height of each bar is the percentage of the total height of the stack.

#### Group width <a href="#barchart-groupwidth" id="barchart-groupwidth"></a>

Controls the width of groups. 1 = max with, 0 = min width.

#### Bar width <a href="#barchart-barwidth" id="barchart-barwidth"></a>

Controls the width of bars. 1 = Max width, 0 = Min width.

#### Bar radius <a href="#barchart-barradius" id="barchart-barradius"></a>

Controls the radius of the bars.

* 0 = Minimum radius
* 0.5 = Maximum radius

#### Highlight full area on cover <a href="#barchart-highlightfullareaoncover" id="barchart-highlightfullareaoncover"></a>

Controls if the entire surrounding area of the bar is highlighted when you hover over the bar.

#### Line width <a href="#barchart-linewidth" id="barchart-linewidth"></a>

Controls line width of the bars.

#### Fill opacity <a href="#barchart-fillopacity" id="barchart-fillopacity"></a>

Controls the fill opacity bars.

#### Gradient mode <a href="#barchart-gradientmode" id="barchart-gradientmode"></a>

Set the mode of the gradient fill. Fill gradient is based on the line color. To change the color, use the standard color scheme field option.

Gradient appearance is influenced by the **Fill opacity** setting.

**None**

No gradient fill. This is the default setting.

**Opacity**

Transparency of the gradient is calculated based on the values on the y-axis. Opacity of the fill is increasing with the values on the Y-axis.

**Hue**

Gradient color is generated based on the hue of the line color.

#### Tooltip mode <a href="#barchart-tooltipmode" id="barchart-tooltipmode"></a>

When you hover your cursor over the visualization, Algology can display tooltips. Choose how tooltips behave.

* **Single -** The hover tooltip shows only a single series, the one that you are hovering over on the visualization.
* **All -** The hover tooltip shows all series in the visualization. Algology highlights the series that you are hovering over in bold in the series list in the tooltip.
* **Hidden -** Do not display the tooltip when you interact with the visualization.

Use an override to hide individual series from the tooltip.

#### Legend mode <a href="#barchart-legendmode" id="barchart-legendmode"></a>

Use these settings to define how the legend appears in your visualization.

* **List -** Displays the legend as a list. This is a default display mode of the legend.
* **Table -** Displays the legend as a table.
* **Hidden -** Hides the legend.

#### Legend placement <a href="#barchart-legendplacement" id="barchart-legendplacement"></a>

Choose where to display the legend.

* **Bottom -** Below the graph.
* **Right -** To the right of the graph.

#### Legend values <a href="#barchart-legendvalues" id="barchart-legendvalues"></a>

Choose which of the standard calculations to show in the legend. You can have more than one.

#### Legend calculations <a href="#barchart-legendcalculations" id="barchart-legendcalculations"></a>

Choose which of the standard calculations to show in the legend. You can have more than one.

***

### Text size <a href="#barchart-textsize" id="barchart-textsize"></a>

Enter a **Value** to change the size of the text on your bar chart.

***

### Axis <a href="#barchart-axis" id="barchart-axis"></a>

Use the following field settings to refine how your axes display.

Some field options will not affect the visualization until you click outside of the field option box you are editing or press Enter.

#### Placement <a href="#barchart-placement" id="barchart-placement"></a>

Select the placement of the Y-axis.

**Auto**

Algology automatically assigns Y-axis to the series. When there are two or more series with different units, then Algology assigns the left axis to the first unit and right to the following units.

**Left**

Display all Y-axes on the left side.

**Right**

Display all Y-axes on the right side.

**Hidden**

Hide all axes.

To selectively hide axes, Add a field override that targets specific fields.

#### Label <a href="#barchart-label" id="barchart-label"></a>

Set a Y-axis text label.

If you have more than one Y-axis, then you can give assign different labels with an override.

#### Width <a href="#barchart-width" id="barchart-width"></a>

Set a fixed width of the axis. By default, Algology dynamically calculates the width of an axis.

By setting the width of the axis, data whose axes types are different can share the same display proportions. This makes it easier to compare more than one graph’s worth of data because the axes are not shifted or stretched within visual proximity of each other.

#### Soft min and soft max <a href="#barchart-softminandsoftmax" id="barchart-softminandsoftmax"></a>

Set a **Soft min** or **soft max** option for better control of Y-axis limits. By default, Algology sets the range for the Y-axis automatically based on the dataset.

**Soft min** and **soft max** settings can prevent blips from turning into mountains when the data is mostly flat, and hard min or max derived from standard min and max field options can prevent intermittent spikes from flattening useful detail by clipping the spikes past a defined point.

You can set standard min/max options to define hard limits of the Y-axis.

***