Standard deviation and coefficient of variation of a band returning always 0


The standard deviation and the coefficient of variation function from the Band Math operator are not working for me, as they always return zero (the expression given are respectively: stddev(band) and coef_var(band)).

Although, when I’ve calculated the standard deviation for the image array given as input (using numpy) the value was not equal to zero!


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If you use two ore more bands /function(band_1, band_2,…)/ as
parameter you should get a meaningful result.

Oh I see, it’s supposed to have more than one band as a parameter.