How do I input my data in the correct format to overcome the problem "unable to peform assignment with 0 elements on the right hand side"
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I am running matlab on an HPC and wish to create multiple array jobs changing the variable in Examplescript (Opts) to the name of the file in 'testfiles.txt'. I am unable to overcxome the problem "unable to peform assignment with 0 elements on the right hand side" when creating the variable Opts.subject = data{i}.
My code is:
i = getenv('PBS_ARRAY_INDEX')
index = str2num(i)
f = fopen( 'testfiles.txt' )
data = textscan(f, '%s' )
fclose(f)
Opts.subject = data{i}
Opts.subject
Examplescript (Opts)
'testfiles.txt' contains:
003_S_4136
006_S_4192
006_S_4546
Your help would be most welcome.
2 Comments
Bob Thompson
on 4 Dec 2018
The error would seem to indicate that data is an empty array. Are you sure that the textscan command is properly scanning your file?
Answers (1)
Cris LaPierre
on 5 Dec 2018
Edited: Cris LaPierre
on 5 Dec 2018
Your main issue is that, apparently, i is a char. At least you use str2num to convert it when creating index. You should therefore be using 'index' instead of 'i' in your assignment.
Opts.subject = data{index}
However, there is, I suspect, another issue.
data is a 1x1 cell.
data{1} is a 3×1 cell array:
{'003_S_4136'}
{'006_S_4192'}
{'006_S_4546'}
data{1}{index} (where index = 1) is '003_S_4136'.
Your code makes me think you want to pull out the first subject id, not all 3 at once.
2 Comments
Cris LaPierre
on 5 Dec 2018
Maybe. It all depends on what your code does. What does running all 3 at once mean?
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