ArcMap raster calculator raising negative values to a power

Question

I have a raster calculator expression:

Power("dataset.tif",1.5)

where dataset is float, and has some negative values.

When I run this expression in raster calculator, all of the negative values within the dataset have an output of 'nodata'.

How can I overcome this issue?

Answer 1

According to the Python help file:

If both x and y are finite, x is negative, and y is not an integer then pow(x, y) is undefined, and raises ValueError.

May be this is the source of your error? The x needs to be a positive integer if you want y to be a double?

Answer 2

I can't find this in Esri doc, but this blog suggests that the ** operator means "to the power of" so "dataset.tif" ** 1.5 may get you what you want.