Map & Match from .csv file and change Variable Name in Workspace

I would like to read a .mat file which consists of all structure field names eg a,b,c etc. I have a .csv file in which Column 1 has the same field names and in Column 2 I have the names to be replaced. Upon every instance of Column 1 names I would like to replace the workspace variabe name with corresponding column 2 value.

[Jeffrey Clark]

You seem to be equivalencing 'structure field' and 'workspace variable' names - they are two different things. If you are trying to load a .mat file variable into a different named variable from your lookup table, I think you would have to first use something like matfile to map the .mat file then use the eval function to create the workspace new variable:

% Given: oldVar is a string or char array containing the original var name
%        newVar is a string or char array containing the desired var name
%        fileName is a string or char array containing the .mat filename
matMap = matfile(fileName);
eval([newVar '= matMap.' oldVar ';']);

If trying to rename a structure's fields maybe something like:

% Given: oldField is a string or char array containing the original field name
%        newField is a string or char array containing the desired field name
%        varName is the structure name
%        fileName is a string or char array containing the .mat filename
matMap = matfile(fileName);
varName.(newField) = matMap.varName.(oldField); % loop/repeat this for all varName fields

[Stephen23]

"I would like to replace the workspace variabe name with corresponding column 2 value."

Are those variables of a table (i.e. the columns) or variables in the workspace?

[SOMASHEKAR M]

Hi Stephen , I would like to rename the workspace structure fieldnames as per the desired names that are present in the column 2 of the .csv file.

The table looks like this

Fieldname DesiredName

____________ ____________

'Test_Sig0' 'Test_Sig_0'

'Test_Sig' 'Test_Sig_1'

'Junk_Sig' 'Junk'

'Junk_Sig_1' 'Junk1'

While structure looks like this

Test_Sig0: {3×2 cell}

Test_Sig: {3×2 cell}

As told earlier , I would like to replace the fieldname 'Test_Sig0' with Desired name referred from the csv, 'Test_Sig_0' and delete the fieldname 'Test_Sig0'.

[Jeffrey Clark]

@SOMASHEKAR M, see my second example above IF you are talking about fields of a Structure array - MATLAB (mathworks.com). It would be something similar if you are talking about colums of a Table array with named variables that can contain different types - MATLAB (mathworks.com).