I am trying to run a function in octave from the command line. The function is currently run like so:
octave --silent --persist --eval 'function(input arguments)'
function.m contains a plot command. When I invoke octave with the above command line parameters, the plot does show but octave enters into its interactive mode. My question is:
Is there any way to get octave to display the plot without entering the interactive mode when it is invoked from the command line?
Just use pause after your plotting functions
pause(N) where N is the number of seconds to wait: in my case 0.1 served the purpose perfectly,You can use:
waitfor(h)
at the end, which waits for you to close the figure.
AFAIK, the plot window is a child process of octave and therefor can only be displayed when octave is running. Even if you plot something from the "interactive" mode leave the plot open and close octave, the plot will also disappear.
What you could do is to plot to some output file like posted here:
f = figure
set(f, "visible", "off")
plot([1,2,3,4])
print("MyPNG.png", "-dpng")
You need to select a proper graphics toolkit:
available_graphics_toolkits
ans =
{
[1,1] = fltk
[1,2] = gnuplot
}
The default is fltk which cannot write to file without displaying the plot. However, if you select gnuplot it will be able to write to file without displaying it first. In your file start with:
graphics_toolkit gnuplot
The problem is that when you run from command line, when it ends, the plot windows disappear with it.
#! /usr/bin/octave -qf
f = figure;
set(f, "visible", "off")
t=0:0.001:5*pi;
plot(t, sin(5*t)), grid
print("MyPNG.png", "-dpng")
This saves output to MyPNG.png in the directory where it is run.
Then you might open it with a visualization program.
Another option is to add
pause
at the end of the program so it waits for user input to terminate, therefore to close the plot window.
Cheers :)
Also can try wait for key.
while (waitforbuttonpress ()==0) pause(1) end
