[Trisquel-users] vector plot software?

[rova]

what free software there is for vector plotting in 3d, you know for linear  
algebra, i installed euler which i think works for that but it splash me in  
the terminal the error: " (euler:2004): Gdk-CRITICAL **: IA__gdk_char_width:  
assertion `font != NULL' failed
Violación de segmento "