I have .mat file that has a size of 1374x2. How do I load this in to variable that can be used inside a function?

x = load ('filename');

will this make 'x' have 1374x2 values?

[dpb]

Yes. No. Maybe. Read the documentaion for load

If 'filename' is a .mat file, then x will be a structure array, the fields of which are whatever variables are in the .mat file.

if filename is an ASCII file, then data are returned as an m-by-n array of type double. m is equal to the number of *DATA* lines in the file, and n is equal to the number of values on a line. Only numeric data can be read this way.

(Fixup for Walter's note...)

[Walter Roberson]

"m is equal to the number of lines in the file"

Non-comment lines. load() of a recognized text file skips lines that begin with %

[Sylvester Selvanathan Pinto Stephen]

Let me rephrase my question..

I have a .mat file which has 1374 rows and 2 columns which have only numeric data.

I want to load this into a variable which has the same size.

I tried this

CycleName = load('epa_city','-ascii')

Error using load

Number of columns on line 2 of ASCII file epa_city must be the same as previous lines.

How should I proceed?

Answer 1

[Guru Mohanty]

Hi, I understand you are getting error in loading a MAT file. Here is a sample code for this, in which MAT file is created using random data. You can use both load and matfile functions.

%% Create input MAT file
clear all;
val=randi(100,1374,2);
save('val.mat','val');
 
%% Load MAT file
 
clear all;
mat_var = load('val.mat');
C = mat_var.val;