Trying to save part of a filename that is being read into a variable as the name of the output file

I have a file called originalfile123.mat and will read it into the function in 'filename'

function xyz (filename,a)

save('filename''a')

I would like the outgoing file to be called originalfile123a.mat, However it is just being saved as 'filename''a'.mat

Thanks

Answer 1

[Stephen23]

Try something like this:

function xyz(filename,a)
[fpth,name,ext] = fileparts(filename);
save(fullfile(fpth,[name,'a',ext]),'a')