Agilent E4411B spectrum analyzer plotting gpib

Hi I want to know how I can plot any signal than appears in screen of a Agilent E4411B spectrum analyzer using gpib and of course matlab.

[Walter Roberson]

I am not completely sure whether you are wanting to send a signal to the Aligent to be plotted, or if you want to get a copy of whatever signal the Aligent is plotting so that you can do something with it too, or if you want to get a graphic copy of the Aligent's current plot so you can display it in a GUI ?

[Jose]

well I want to do the last. i don't know what command i must use to get data to plot.