When to use a Bar Chart Stacked
These are generally a good way to represent multiple types of data within a single bar. For example you wanted to compare prison populations but wanted to divide it further into female and male categories. The bar chart stacked is just an extension of the bar chart, and are great for showing the total size of groups especially if there is a part to whole relationship within your data. A good example of a stacked chart is can be seen below.
It is best practice to only use two or three categories per group as too many will make it very hard to see patterns in the data.
Most stacked bar charts are plotted vertically, but you have the option to show the data stacked horizontally, ultimately you need to decide what you are trying to show from your data. If you have particularly long labels for your data sets then this would be the best option.
If you have negative values then you should stear clear of this chart, as there is no way to show negative spaces in a positive bar.
If you want to learn how to easily make a bar chart stacked with ChartBlocks then then in our FAQ area we have a step by step guide of how to make charts?