How I can to get the name of a file.mat when i load it?

Hello, i want to get the name of a file.mat when i load it. For example, I load 'Resonator.mat', how i can to get the string 'Resonator' when i load it?

I know how to load a .mat file and how to save it, but i need the get the name because i want to overwrite the variables of the .mat and save with the same name(i have a lot of .mat and i can't fix the name).

Answer 1

[Vishwas Kumar]

You can use something like uigetfile

fileName = uigetfile('*.mat');
load(fileName)
filename = filename(1:end-4)

Or alternatively, you can do some batch processing doing something like:

dirinf = dir('*.mat');
nfiles = length(dirinf);
for n = 1:nfiles
  infile = dirinf(n).name; % extract one file name from struct
  load(infile) % load the data
  infile = infile(1:end-4);
end

[ELLER JUCO]

how do you find the size from the fileName?

m=size(fileName) - does not work

[Steven Lord]

Find the size of what from the file name?

The size of the file on disk? Use dir.

locationOfCensusMat = which('census.mat')

locationOfCensusMat = '/MATLAB/toolbox/matlab/demos/census.mat'

D = dir(locationOfCensusMat)

D = struct with fields:
       name: 'census.mat'
     folder: '/MATLAB/toolbox/matlab/demos'
       date: '14-Mar-2004 15:32:00'
      bytes: 353
      isdir: 0
    datenum: 7.3202e+05

The sizes of the variables in the file? Use whos.

W = whos('-file', locationOfCensusMat)

W = 2×1 struct array with fields:
    name
    size
    bytes
    class
    global
    sparse
    complex
    nesting
    persistent

W(1)

ans = struct with fields:
          name: 'cdate'
          size: [21 1]
         bytes: 168
         class: 'double'
        global: 0
        sparse: 0
       complex: 0
       nesting: [1×1 struct]
    persistent: 0

Answer 2

[Abel Romero]

Thank you for your help, it was what i needed-