RMVAR Remove variables from MAT-File

RMVAR is a simple program that removes specified variable(s) from a MAT-File

Description

RMVAR FILENAME VAR1 VAR2... removes the variables VAR1, VAR2... from the Mat-File FILENAME. If FILENAME has no extension RMVAR looks for FILENAME.mat
 
RMVAR('Filename','VAR1','VAR2' ...) does the same.
 
Example:
       % Creates a file 'myfile.mat' containing 2 variables:
       a='hello';
       b=magic(3);
       save myfile.mat a b
       % Removes the variable 'a' and opens the result
       clear
       rmvar myfile a
       load myfile
       whos

• MATLAB release: MATLAB 7 (R14)

[luo guoping]

if the mat is much huge,this routine demand huge memory.

[B]

I tried to use this file to remove some redundant variables from a mat file that became to large to open (after adding vars with '-append').

However, this m-file apparently needs to load the complete m-file. A function that would be able to remove variables without having to load the complete data set would be of great interest.