Derivate a signal in matlab

Hi everybody

Here is my problem:

I have a signal and i want to calculate its first derivate... but I don't know ho to do it..

Can anyone help me?

Thank you

Answer 1

[Thomas]

this might help

http://autarkaw.wordpress.com/2009/03/21/how-do-i-differentiate-in-matlab/

 doc diff

[Walter Roberson]

Alternately, grad() [gradient] might be more appropriate.