I am having this error "Index in position 3 is invalid. Array indices must be positive integers or logical values." in my file. Can you please help me in resolving this.

I am trying to convert dataset from Nifti to PNG but the error is coming.

imds = imageDatastore('D:\DatasetNifti\control2', ...
     'IncludeSubfolders',true,'LabelSource','foldernames','FileExtensions','.NII');
for i=1:numel(imds.Files)
     info = niftiinfo(imds.Files{i});
     x=info.ImageSize;
     %fprintf('%d %d %d\n',x(1),x(2),x(3));
     Y = niftiread(imds.Files{i});
     img=uint16(Y(:,:,x(3)/2));
      %imshow(img,[])
      s=imds.Files{i};
      s(end-2:end)='png';
      imwrite(img,s);
end

After running the code below is a error which is coming.

Index in position 3 is invalid. Array indices must be positive integers or logical values.

Error in DataConversion (line 8)

img=uint16(Y(:,:,x(3)/2));

[Muhammad]

thank you it solved

Answer 1

[Antoni Garcia-Herreros]

Hello Muhammad,

Most likely your x(3) value will be and odd integer, therfore when you divide it by 2 you'll have a float.

You should round the result of x(3)/2

img=uint16(Y(:,:,round(x(3)/2)));