surface plot figure size with getframe

i want to make this simple animation as video, but with high resolution, so i saw that simply increasing size kinda worked. i first used fuigure('position') to get the correct number of pixels, but that always cropped a portion of the screen in the video. so i just need a way to increase image size, or increase the getframe resolution.

p.s. i just started matlab 5 days ago, and do not know much about complex functions, so plz explain in simple language or give more context.

Thanks

figure
[x,y]=meshgrid(-3:0.2:3);

for k=0:35
z=k*exp(-(x.^2+y.^2));
surf(z,'FaceAlpha',0.5);

colormap(winter)
axis([0 31 0 31 0 50])
view(45,30)
Ax.ZAxis.Visible = 'off';
Ax.ZGrid = 'off';
Ax.Color = 'none';
Ax = gca;
Ax.XAxis.Visible = 'off';
Ax.XGrid = 'off';
Ax = gca;
Ax.YAxis.Visible = 'off';
Ax.YGrid = 'off';

movieVector(k+1) = getframe;

end

myWriter = VideoWriter('curve');            
myWriter.FrameRate = 50;
open(myWriter);
writeVideo(myWriter, movieVector);
close(myWriter);
end

Answer 1

[darova]

Use print to save an image with high resolution

clc,clear
opengl software
x = 0:1:10;
y = sin(x);
h = plot(x(1),y(1),'or');
line(x,y)
mkdir('test')                       % create folder
obj = VideoWriter('test/test.avi'); % create video file
obj.FrameRate = 5;                  % set speed of movie
open(obj)                           % open object
for i = 1:length(x)
    set(h,'xdata',x(i),'ydata',y(i))% move marker
    fname = sprintf('test/image%d.png',i);  % file name
    print(fname,'-djpeg','-r200')   % save image with high resolution
    I = imread(fname);              % read high resolution image
    writeVideo(obj,I);              % write image to movie file
    pause(.2)
end  
close(obj);