[QGIS-Developer] How to select a small region of a QGIS raster image and calculate basic stats

[C Hamilton]

I find that I need to be able to select a small area of a raster image in
QGIS and have it calculate basic stats such as max, min, average, and
median. I cannot seem to find any function to do this or a plugin to do it.
Am I missing the functionality somewhere? I would need to do this hundreds
of times as I examine peaks in magnetometry data to help classify the
features. Those values would then be added to a table of features.

If this is not an available feature does anyone know how to quickly
implement it? I haven't written any raster plugins yet. All my others are
vector related.

Thanks,

Calvin
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