Thread Subject: cosine transform

Hi all,

I want to take an audio file (WAV) and make to him the cosine transform. As I understand bacause that isn't a image file I suppose to use the 1D dct function. I'm right? The question is, if I want to plot the result - it's a normal plot? How could i know wich axis I recieve at the normal plot of the dct?

Thanks all

Ok, regarding the plot it's like a normal function and it's possible to use the normal plot function.
My doubt is about the axis of the dct. As I understand from the matlab help and so on, it supposed to be Frequency - Amplitude (X - Y).
But when I plot it it appear like Samples - Amplitude, how can I display it as Frequency x axis???

I'm really get confused..

Tanxs