Octave plot from Qt C++ application

Question

I have a QT C++ application that runs the Octave program using QProcess. I am able to communicate with it by reading the standard output/error and writing to it\'s standard

Answer 1

Octave, like Matlab, can be run in batch mode to perform computations without graphical UI. I assume that Octave detects that it is not run from an interactive session, and therefore automatically goes into batch mode. You would expect Octave to suppress graphical output (e.g. gnuplot output) when being in batch mode.

Try to force Octave into interactive mode by using the --interactive command line option: http://www.gnu.org/software/octave/doc/interpreter/Command-Line-Options.html