Octave crashes when printing a plot

问题

Solution: As suggested by user Andy in the comments, an update to the newest version of Octave (at the moment: octave-4.0.1-rc4) fixed the problem and the plot could be saved as PNG.

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I have a large-ish amount of data that I plot in Octave. But when I try to save the image, the program crashes without any explanation or real error message. My Octave is version 4.0 and it's running on Win 8.1, the graphics_toolkit is qt.

Saving smaller amounts of data has worked so far, but somehow I seem to have reached a size where the plot can be drawn but not saved.

First, I load the data from several files listed in the vector inputs:

data = [];
for i = 1:length(inputs)
  data = [data; load(inputs{i})];
endfor

The result is a 955.524 x 7 matrix containing numbers. Loading alone takes a while on my system (several minutes), but eventually succeeds. I then proceed to plot the data:

hold on;
for j = 1:length(data(1,:))
  curenntColumn = normalize(data(:,j)); % make sure all data is in the same range
  plot(1:length(curenntColumn), curenntColumn, colours{j}); % plot column with distinct colour
endfor
hold off;

This results in a plot being drawn as Figure 1 that shows all 955.524 entries of each of the seven columns correctly in a distinct colour. If the program ends here, it exits properly. However, if I add

print("data.png");

Octave will keep running after opening the plot window and eventually crash with a simple "program does not work anymore" error message. The same happens if I try to save manually from the File->Save menu (which offers saving as PDF). Even just touching and moving the plot window takes a few seconds.

I tried using gnuplot and fltk as graphics_toolkit, but the latter does not even open a plot window, and the former seems to be broken (crashes on the attempt of plotting even simple data like plot(1:10,1:10);).

Now, I could screenshot the plot and try to work with that, but I'd really rather have it be saved automatically. Also, I find it weird that displaying the curves is possible, but not saving said display. As it works for smaller amounts of data, maybe I just need to somehow allocate more resources to Octave?

来源：https://stackoverflow.com/questions/36014056/octave-crashes-when-printing-a-plot