I got error : Names of fields in structure arrays being concatenated do not match. Concatenation of structure arrays requires that these arrays have the same set of fields.

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I have used the following files and the error is :
Error using vertcat Names of fields in structure arrays being concatenated do not match. Concatenation of structure arrays requires that these arrays have the same set of fields.
Error in linearsyntax (line 16) test=[test0;test1];
  3 Comments
Image Analyst
Image Analyst on 24 Mar 2017
What does this show:
fieldnames(NormalMRI);
fieldnames(AbnormalMRI);
If they don't show the same fieldnames, which is what the error is saying, then exactly what are you trying to do?

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Accepted Answer

Walter Roberson
Walter Roberson on 23 Mar 2017
The return value from load() is a structure with one field for each variable stored in the mat file. Even without opening the mat files I can tell that your code instead expects the return value to be the content of a single variable stored in the mat file. You will need to refer to the appropriate field name of the returned structure.
  8 Comments
Walter Roberson
Walter Roberson on 26 Mar 2017
The return value from load() is a structure with one field for each variable stored in the mat file. This code does a load() and queries the field names of the resulting structure and picks the first one. It then does dynamic field name referencing to extract the content of the field.
The net result is to return the content of the "first" variable stored in the .mat file.

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