Plot size varies even when plotting in a loop

Hello all,

I wrote a loop that reads a set of data files, makes a plot using the data in each file, exports the plot to a png file, and continues.

Since this is done in a loop using a counter, I expect the images saved in png format to be the same size and resolution. However, the images seem to be of different sizes/positions, so when I try to assemble the png files to produce a movie, the movie appears to flicker or jerk.

Here is the body of the loop. Any thoughts would be appreciated.

Thanks.

for it = 1: nt
    data = dlmread([pathName0 timeList{it} '/' var '_planeXY.raw'], '', 2, 0);
    x = data(:, 1);
    y = data(:, 2);
    z = data(:, 4);
    t1 = num2str(t(it, 1)*1.0e03);    
    xlin = linspace(0, max(x), 300);
    ylin = linspace(min(y), max(y), 300);
    [X, Y] = meshgrid(xlin, ylin);
    Z = griddata(x, y, z, X, Y, 'cubic');
    h = figure();
    colormap(jet);
    grid off;
    surf(xlin/1e-03, ylin/1e-03, Z, 'Edgecolor', 'none');
    shading interp;
    view(2);
    cb = colorbar();
    set(cb, 'ytick', [0 0.05 0.1 0.15 0.2]);
    cbTitle = get(cb, 'Title');
    set(cbTitle ,'String', varName);
    caxis([0 0.2]);
    ylabel('$r$ [mm]', 'Interpreter', 'latex', 'Fontname', 'Times', 'Fontsize', 40);
    xlabel('$z$ [mm]', 'Interpreter', 'latex', 'Fontname', 'Times', 'Fontsize', 40);
    title(['Time: ' t1 ' [ms]'], 'Fontname', 'Times', 'Fontsize', 40);
    yticks([-30 -20 -10 0 10 20 30]);
    xticks([0 10 20 30 40 50 60 70 80]);
    ax = gca();
    set(ax, 'Fontname', 'Times', 'Fontsize', 24);
    axis([0 80 -35 35]);
    
    print(h, '-dpng', [caseLES '/' timeList{it} '.png']);
    close all;
    
end

[dpb]

If you want a specific resolution, use the key -r on the command line followed by the desired resolution.

Answer 1

[Prabhan Purwar]

Hi,

Following links may help:

• https://in.mathworks.com/help/matlab/creating_plots/save-figure-at-specific-size-and-resolution.html (Save Figure at Specific Size and Resolution)

• https://in.mathworks.com/matlabcentral/answers/384848-get-figures-and-use-them-to-build-a-video-avi (Get figures and use them to build a video)

• https://in.mathworks.com/matlabcentral/answers/280635-make-video-from-images (Make video from images)

Hope it helps!!