[Neuroimaging] writing gifti files

[Michiel Cottaar]

Hi Emma,

The problem is that wb_view only supports float32 while python likes to 
convert everything to float64. The produced gifti file opens normally in 
wb_view, when I convert your data to float32 just before creating the 
data arrays (see attached file).

Michiel


On 12/04/2017 09:54, Emma Robinson wrote:
> Hi
>
> I have a problem reading giftis that I write from nibabel. It works if 
> I replace the data with data taken straight out of another gifti data 
> array, but if I add a matrix of floats I am unable to read it into the 
> HCP's workbench viewer, not use the FSL gifti reader. I get the 
> following error messages:
>
> from wb_view
>
> Parse Error while reading 
> /vol/medic01/users/ecr05/TESTINGRESULT2.func.gii: Decoding of GZip 
> Base64 Binary data failed.Decoded 0 bytes but should be 0 bytes. line 
> number: 15 column number: 68831
>
>
> from FSL
>
> terminate called after throwing an instance of 'GiftiException'
>  what():  Requested non-float data from float GIFTI field
>
> I've attached some test code and the gifti file I tested it with. Any 
> suggestions of how to fix this would be appreciated, thanks
>
> Emma
>
>
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