A risk matrix heatmap for Google Charts that calculates the total number of risks in each category based on likelihood/impact
Copyright 2020 Nathaniel Logan. Author: Daniel Fredriksen & Nathaniel Logan
For information on how to use Google Charts API, visit the (Google Charts documentation)[https://developers.google.com/chart/interactive/docs/quick_start].
The matrix takes
The second parameter of the draw function is an object whose properties will override some of the default options, according to the Google Charts design spec. The following options that can be specified are shown below with their defaults:
categories = 5
xAxisLabel = 'Impact / Severity / Consequence'
yAxisLabel = 'Likelihood / Probability / Frequency'
categoryLabels = ['Negligible', 'Low', 'Moderate', 'High', 'Critical']
colors = ['#6aa84f', '#ffff00', '#ff9900', '#ff0000', '#000000']
darkFontIndex = [1]
fontColorLight = '#ffffff'
fontColorDark = '#000000'
This setting determines how many categories of risk there are. It will generate a matrix of categories rows and categories columns. The default is 5 which will create a 25 cell matrix.
The text which will be displayed for the x-axis label. If this option is specified, it will override the value taken from the 0th column title.
The text which will be displayed for the y-axis label. If this option is specified, it will override the value taken from the 1st column title.
Takes an array of strings which represent the labels of the categories of each column. Must have as many elements as there are categories. If there is a mismatch between categories and categoryLabels.length then all size-dependent properties will reset to their defaults (categories, categoryLabels, darkFontIndex and colors).
Takes an array of strings which represent the css property to use for the colors of the cells. The number of colors should match the number of categories. If there is a mismatch between categories and colors.length then all size-dependent properties will reset to their defaults (categories, categoryLabels, darkFontIndex and colors). The colors for each cell will be determined based on a set of conditions to simulate a gradient, with the 0th index representing the bottom left of the matrix and the largest index representing the top right.
An array of integers which represent the matching color indexes where the darkFont color should be applied. If the darkFontIndex array contains a value that exceeds the available indexes in colors then all size-dependent properties will reset to their defaults (categories, categoryLabels, darkFontIndex and colors).
A string representing the css value to use for the text color of the cells which do not display a color index matching any of the values specified in darkFontIndex
A string representing the css value to use for the text color of the cells which display a color index matching any of the values specified in darkFontIndex