Write string attributes as a string

[LTLA]

When using h5writeAttributes, it seems that we end up with arrays of fixed-width strings (probably H5T_C_S1?). This confuses other HDF5 readers that expect an actual string (usually one of the H5T_CSET options).

It seems like it would be generally useful to include an encoding= option in h5writeAttributes that allows us to switch to ASCII or UTF-8 when a length-1 character vector is supplied. A similar option might also be useful for h5writeDataset as well. For all other character vectors, this argument can be ignored, with a warning, or we can error out and say that they can't do that.

[TriLe965]

Is this issue resolved? I'm trying to write an actual string with h5writeAttributes but it seems impossible.

[grimbough]

Thanks for the pull request @LTLA That's now been merged and should be available in version 2.35.4