Clear Filters
Clear Filters

Error in saving plot as PNG?

34 views (last 30 days)
for i = 3386:5100
%mkdir 8PSK
x = load(['frame_snr016QAM' num2str(i) '.mat']);
sps = 8;
eyediagram( x.frame , sps)
set(get(gcf, 'Children'), 'Visible', 'off')
cd 16QAM
pause(0.5)
saveas(gcf,['frame_snr016QAM' num2str(i) '.png']);
cd ..
close
end
error
Error using print (line 83)
PNG library failed: Write Error.
Error in saveas (line 181)
print( h, name, ['-d' dev{i}] )
I want to save the plot of eyediagram in a folder. but it was working correctly now i am facing png library failed issue. Please assist

Accepted Answer

Image Analyst
Image Analyst on 7 Oct 2021
If you have R2020, try exportgraphics() instead of saveas().
And you can also use isfolder(). Replace
if ~exist(outdir, 'dir'); mkdir(outdir); end
with
if ~isfolder(outdir)
mkdir(outdir);
end
  2 Comments
john karli
john karli on 8 Oct 2021
it works but how can i save it ?
Walter Roberson
Walter Roberson on 8 Oct 2021
exportgraphics() saves directly to file -- it is a new routine intended to replace print() and saveas()

Sign in to comment.

More Answers (1)

Walter Roberson
Walter Roberson on 7 Oct 2021
Edited: Walter Roberson on 7 Oct 2021
outdir = '16QAM';
if ~exist(outdir, 'dir'); mkdir(outdir); end
for i = 3386:5100
in_filename = sprintf('frame_snr016QAM%d.mat', i);
out_filename = fullfile(outdir, sprintf('frame_snr016QAM%d.png', i));
x = load(in_filename);
sps = 8;
eyediagram(x.frame, sps)
set(get(gcf, 'Children'), 'Visible', 'off')
pause(0.5)
saveas(gcf, out_filename);
close
end
  6 Comments
john karli
john karli on 7 Oct 2021
I am using windows. the error is same
Walter Roberson
Walter Roberson on 7 Oct 2021
You might be able to use Process Explorer to find out whether your process is accumulating open files;

Sign in to comment.

Categories

Find more on Printing and Saving in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!