Charting > Chart-Specific Properties > Histogram Chart Properties (histogramProperties)

Histogram Chart Properties (histogramProperties)

How to:

A histogram is a graphical representation of the frequency distribution of data. The histogramProperties object controls the properties associated with the distribution of data.

Syntax: How to Control Histogram Chart Properties 

"histogramProperties": {
   "binCount": number,
   "binSize": size,  
   "startBinValue": number}

where:

"binCount": number

Is the number of group labels to draw, or undefined (automatic). The default value is undefined.

"binSize": size

Is the size of the value range for assigning data values to a bin. Can be a number, an array of numbers (for variable bin sizes), or undefined (automatic). If binSize is an array, binCount is ignored and assumed to be the length of the binSize array. The default value is undefined.

"startBinValue": number

Is a number to use as the first bin, or undefined (automatic). The default value is undefined.

Note:
  • The blaProperties orientation property draws the chart in horizontal or vertical format. However, instead of using this property, you can control the orientation of the chart using the LOOKGRAPH parameter, which has a value for each histogram orientation. For information about the LOOKGRAPH parameter, see Controlling the Chart Type.
  • In a vertical histogram, the y-axis is on the left side of the chart and the x-axis is drawn on the bottom of the chart.
  • In a horizontal histogram, the x-axis is on the left side of the chart and the y-axis axis is drawn on the bottom of the chart.
  • Use blaProperties:barGroupGapWidth to control the gap between histogram risers.
  • The series-specific properties control the colors and borders (if any) of histogram risers.
  • Use yaxis properties to control the format of y-axis title and labels.
  • Use xaxis properties to control the format of x-axis title and labels. X-axis labels are calculated. They are not defined by the groupLabels property.

Example: Setting the Histogram Bin Count

The following request creates a vertical histogram (ON GRAPH SET LOOKGRAPH VHISTOGR) with a bin count of 5: 

GRAPH FILE WF_RETAIL_LITE
SUM REVENUE_US 
BY COGS_US
ON GRAPH PCHOLD FORMAT JSCHART
ON GRAPH SET LOOKGRAPH VHISTOGR
ON GRAPH SET STYLE *
INCLUDE=IBFS:/FILE/IBI_HTML_DIR/javaassist/intl/EN/ENIADefault_combine.sty,$
*GRAPH_JS
"histogramProperties": {"binCount": 5},
"legend": {"visible": false}
*END
ENDSTYLE
END

The output is:

 WebFOCUS

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