How to pass Matlab workspace variable into system command?

I am using a program (wgrib) which is used to read .grb file and it runs in linux environment. This program required filename to read it. Now I want to use this programm using 'system' command in matlab. It works fine when I give the name of file but fails to execute when I give the variable which contains several file name. For ex. it works fine when I use

[u v]=system('wgrib xyz.grb') where wgrib is programm and xyz.grb is file name

But when I give it like

[u v]=system('wgrib filename')

where filename is a matlab variable which contains file name (i.e. xyz,grb), it does not execute and says didn't find file.

Can anyone suggest how to pass matlab variable in system command.

Answer 1

[Jan]

[u v] = system(['wgrib ', filename])

[Saurabh Srivastava]

Dear Jan, Thanks for suggestion but I have already tried it and It did not work. :(

Answer 2

[Walter Roberson]

filename = 'xyz.grb';
[u v]=system( sprintf('wgrib %s', filename) )

[mg khine]

Thanks so much.

Answer 3

[cui,xingxing]

filename = 'xyz.grb';
command = ['wgrib  ',filename];
[u v] = system(command)