Error using load : Input must be a MAT-file or an ASCII file containing numeric data with same number of columns in each row.

Error using load

Unable to read file 'C:\Users\erand\Downloads\T1.mat'. Input must be a MAT-file or an ASCII file

containing numeric data with same number of columns in each row.

Error in uiimport/runImportdata (line 470)

datastruct = load('-ascii', fileAbsolutePath);

Error in uiimport/gatherFilePreviewData (line 438)

[datastruct, textDelimiter, headerLines]= runImportdata(fileAbsolutePath, type);

Error in uiimport (line 260)

gatherFilePreviewData(fileAbsolutePath);

[Star Strider]

See what this reveals:

type('C:\Users\erand\Downloads\T1.mat')

It may just produce garbage, however it may also reveal the problem.

[Eran Dutt]

It produced garbage

[Mrutyunjaya Hiremath]

can you share the T1.mat'?

[Eran Dutt]

T1.mat (One Drive Link)

[Star Strider]

It failed forr me as well:

LD = load('T1.mat')

Error using load

Invalid field name: 's?????_label'.

The ‘?????’ may be Unicode characters or something else that MATLAB doesn’t recognise as acceptable. There doesn’t appear to be a way to modify load to import those, since you already tried '-ascii' and that obviously didn’t work.

See if you can find a valid version of the file. There’s nothing further to be done here.

Answer 1

[Walter Roberson]

The binary .mat file contains invalid variable names such as

---#_label 1x1 116 cell

----#_label 1x1 116 cell

------#_label 1x1 116 cell

-------#_label 1x1 116 cell

---------#_label 1x1 116 cell

----------#_label 1x1 116 cell

--------------#_label 1x1 116 cell

-------------_label 1x1 116 cell

------------_label 1x1 116 cell

---------_label 1x1 116 cell

---------_label 1x1 116 cell

--------_label 1x1 116 cell

-------_label 1x1 116 cell

------_label 1x1 116 cell

------_label 1x1 116 cell

------_label 1x1 116 cell

----_label 1x1 116 cell

--_label 1x1 116 cell

--_label 1x1 116 cell

--_label 1x1 116 cell

--_label 1x1 116 cell

-_label 1x1 116 cell

-_label 1x1 116 cell

-b---_label 1x1 116 cell

???-_label 1x1 116 cell

???_label 1x1 116 cell

You can attempt to use the File Exchange contribution LOADFIXNAMES by @James Tursa

Unfortunately on my Mac, a message is generated about "Warning: Too many duplicate names"

[Walter Roberson]

By the way, if you use

load T1.mat

without any output arguments then it will not give any warning or error, and will load all of the variables that have valid identifier names, skipping the entries that have invalid identifiers.

However, if you use

S = load('T1.mat')

or

S = load('-mat', 'T1.mat')

then it will fail, complaining about invalid variable names.

The FEX contribution, as-posted, is able to fix up some of the variable names, but not all. (I assume it could be modified to support more names.)