about "Signal Procssing Toolbox"

[wdmax]

it's quite a easy problem...i knew little about Matlab...
i was doing my job with Matlab.Now i met a problem:to make signalfilter i need use butter.m
but there's no such m.file in my Matlab(Ver6.5 R13).i found that i must install the Toolbox "Signal Processing"(am i right?).But where can i get it?

thanks a lot!

 

[MikeyP]

http://www.mathworks.com

M

--
Dr Michael F Platten

 

[IRstuff]

You have to buy most Matlab toolboxes.

TTFN