annotate_heatmap¶

gammapy.visualization.annotate_heatmap(im, data=None, valfmt='{x:.2f}', textcolors=('black', 'white'), threshold=None, **textkw)[source]¶

A function to annotate a heatmap.

Parameters

im: The AxesImage to be labeled.
data: Data used to annotate. If None, the image’s data is used. Optional.
valfmt: The format of the annotations inside the heatmap. This should either use the string format method, e.g. “$ {x:.2f}”, or be a matplotlib.ticker.Formatter. Optional.
textcolors: A list or array of two color specifications. The first is used for values below a threshold, the second for those above. Optional.
threshold: Value in data units according to which the colors from textcolors are applied. If None (the default) uses the middle of the colormap as separation. Optional.
**kwargs: All other arguments are forwarded to each call to text used to create the text labels.