[Numpy-discussion] "upsample" or scale an array

[Robin Kraft]

I need to take an array - derived from raster GIS data - and upsample or scale it. That is, I need to repeat each value in each dimension so that, for example, a 2x2 array becomes a 4x4 array as follows:

[[1, 2],
 [3, 4]]

becomes

[[1,1,2,2],
 [1,1,2,2],
 [3,3,4,4]
 [3,3,4,4]]

It seems like some combination of np.resize or np.repeat and reshape + rollaxis would do the trick, but I'm at a loss.

Many thanks!

-Robin