Google Charts hide only some series in legend

Question

Is it possible to hide only some series in the legend.

I have a combo chart containing:

• amount of A
• amount of B
• amount of C

all displayed as one stacked column.

and also:

• amount/second of A
• amount/second of B
• amount/second of C

all displayed as separate lines within the same chart.

Now "amount of A" has the same color as "amount/second of A". This color should be displayed in the legend only once and labelled "A".

Is it possible to do that with Google Charts? If so, how?

Answer 1

You can remove specific entries from the legend by setting the chart's series.<series index>.visibleInLegend options to false for the series you want to hide from the legend. As an example, if the amount/second series are the 4th, 5th, and 6th data series in your data set, you could create a series option like this to hide them:

series: {
    3: {
        visibleInLegend: false
    },
    4: {
        visibleInLegend: false
    },
    5: {
        visibleInLegend: false
    }
}

The series index is counting data series only, not DataTable columns, so ignore your domain column and any special role columns you are using when determining the series index.