managing graphs



1. How do I get a graph in Maxima Console and not in a separate 
graphical window?

This line below to graph in a separate graphical window    (%i1) plot2d 
(sin(x), [x, 0, 2*%pi]);

The manual says:        gnuplot_term  - Sets the output terminal type 
for gnuplot. 
o       Default value: default  - Gnuplot output is displayed in a 
separate graphical window. 
o       Value: dumb - Gnuplot output is displayed in the Maxima console 
by an "ASCII art" approximation to graphics. 

but this line                (%i1) plot2d (sin(x), [x, 0, 2*%pi],   
[gnuplot_term,  dumb ]);           don't produce any result.


2. After this (%i1) plot2d (sin(x), [x, 0, 2*%pi], [gnuplot_term, ps], 
[gnuplot_out_file, "sin.eps"]);   With whom software can I trasform the 
eps file in jpeg o gif file?

Thank you in advance.

Palmira Anne