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readimage function throws error in MAtlab 2018a

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Nandagopalan Venugopalan
Nandagopalan Venugopalan on 18 May 2018
readimage function with a pixelLabelDatastore argument Throws error
Error using whos
Must be a string scalar or character vector.
Error in categorical/subsref (line 20)
whos (s.subs{:})
Error in matlab.io.datastore.PixelLabelDatastore.label2cat (line 851)
C = categoricalCache(uint16(L)+1);
Error in matlab.io.datastore.PixelLabelDatastore/label2categorical (line 789)
C{i} = matlab.io.datastore.PixelLabelDatastore.label2cat(...
Error in matlab.io.datastore.PixelLabelDatastore/readimage (line 502)
C = this.label2categorical(C, info);
Error in Main_2 (line 14)
C = readimage(pxds,1);
  2 Comments
Nandagopalan Venugopalan
Nandagopalan Venugopalan on 18 May 2018
Pls find the output below. I haven't edited the particular file.
content = strsplit(fileread(fullfile(matlabroot, 'toolbox', 'matlab', 'datatypes', '@categorical', 'subsref.m')), '\n', 'CollapseDelimiters', false);
content{20}
ans =
' whos (s.subs{:})'

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Answers (1)

Guillaume
Guillaume on 18 May 2018
For some reason, the content of categorical/subsref.m (true path of the file is the output of fullfile(matlabroot, 'toolbox', 'matlab', 'datatypes', '@categorical', 'subsref.m')) has been edited. Line 20 of that file is not what it should be. it looks like somebody was trying to debug the file and left some debug code there. That debug code makes no sense as in most cases it will error and in the rare cases where it doesn't, will output nonsense.
As it's unknown what else has been modified, I would recommend you reinstall matlab unfortunately.
And of course, never modify matlab own m files.
  1 Comment
Nandagopalan Venugopalan
Nandagopalan Venugopalan on 18 May 2018
Hi Guillaume
Thank You... Will do the suggested and keep posted!

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