The enviinfo function was used incorrectly, I don't know what went wrong.

Wrong use of cell2struct, field name "Exposure(Ms)" is invalid.

I don't know what he means.

Answer 1

[Walter Roberson]

It appears that the data file has a header that is Exposure (Ms) .

This is not a standard ENVI header, but MATLAB tries to put all of the headers from the file into the information structure.

In the current implementation, MATLAB tries to do that by using the names in the header as field names in a struct. However, Exposure (Ms) is not a valid MATLAB field name, and the process fails.

There is no option you can use to fix the problem; there is a mismatch between the expectation of the code (that all field names in the file with be valid MATLAB identifiers) and what you have in the file.

If you are willing to edit the Mathworks enviinfo code, you should be able to work around the problem.

In your version (R2021a) line 256 of the enviinfo.m file currently reads

 otherwise

Immediately above that, insert these lines

case 'Exposure (Ms)'
    key = 'Exposure_ms';                                          % Scalar numeric value
    value = str2double(strtrim(split(value,','))); 

... I am guessing here that the current field is not giving the exposure time in mega-seconds and that it is badly named ms (milli-seconds)

[Walter Roberson]

I reported the bug to Mathworks.

[宁 甘]

Thank you very much for your suggestion, but inserting the code you provided still does not solve the problem.The exposure time in the HDR file is indeed ms.

[宁 甘]

But I removed it and can run

[宁 甘]

I removed the ms unit brackets based on the code you provided and it works, could it be that the bracket symbol is affecting the program.