Hello

You can use help in matlab

Use help plot

in order to plot many graphs, you can plot like this by using plot(x,y,x1,y1,x2,y2)

you just define you x,x1,x2,....etc and y,y1,y2,........etc

Thanks

Dear 

I think this link will help you

https://www.mathworks.com/matlabcentral/answers/154935-how-to-plot-trend-lines-of-2-fft-graphs-which-have-very-large-data-points

regards

Saeed

Thanks all :)

Hi Ahmed,

you can also use successive plot(x,y) if the hold function is on (type "hold on").

For example:

- hold is OFF (default)

if you write

plot( x1, y1 );

plot( x2, y2 );

you will only visualize the second plot.

- hold is ON

if you write

plot( x1, y1 );

hold on;

plot( x2, y2 );

you will visualize both curves on the same axis

Raphaël

Really appreciate it Sir :D