The coloring of the heatmap is based solely on the values contained in the feature array of each leaf. But sometimes it may be useful to display alternative text values, e.g. we can cluster and color the heatmap according to the normalized data, but display the original values.

To do that that we can use the alternative_data section in the InCHlib format and set the option alternative_data to true. The number of alternative data dimensions must be equal to the number of dimensions of the original features.

In the example below the original text values are replaced by value "whatever 1" for the first column, "whatever 2" for the second and "whatever 3" for the third one.