h5math apparent error about h5utils HOT 4 CLOSED

You want h5math -ve 'd1 - d2' out.h5 f1.h5 f2.h5, I think?

from h5utils.

YES! The irony is that I started with that syntax about 137 attempts ago and convinced myself that it should be d1 in BOTH files because dn refers to the number n of the data set in EACH file. So I was sure that d1 - d2, while superficially plausible, could not possibly be correct! Suppose you had one data set in f1.h5 and two data sets in f2.h5 AND you wanted to take the difference between the data set in f1.h5 and the second data set in f2.h5. Would the expression be 'd1 - d3'?

from h5utils.

Wouldn't it be better to use dmn where m Is the sequential (left to right) numbering of the h5 file and n is the numbering of the data set within the mth h5 file? If such were the case, then multiple h5 files and multilple data sets within those files could be used in math expressions without confusion.

from h5utils.

If you have multiple datasets per file, you specify the files as filename.h5:dataset to indicate which dataset you want. (You can list the same file multiple times with different datasets.)

from h5utils.