Error in saveas, Invalid figure handle
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Daphne PARLIARI
il 16 Gen 2020
Commentato: Ivan Spector
il 5 Mag 2022
Hello!
I am writing a code (see attached) which is turning out to be a bit long... and when I try to produce many plots I get the error
Error using saveas (line 83)
Invalid figure handle.
I suppose this is happening because the system gets overwhelmed by the many plots, right?
Is there a way to fix it but still get all the graphs I need?
Thank you!
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Star Strider
il 16 Gen 2020
I cannot run your code because I do not have the necessary files.
However:
%% Let's plot T and RH timeseries
hf1 = figure;
idx = A.ToutoC <= 45 & A.ToutoC >= -10;
fig = plot(A.dec_time(idx), A.ToutoC(idx));
ylabel([vars{1},' (',varunits{1},')'],'fontsize',12,'fontweight','bold')
xlabel('Date')
title(['Measured ', vars{1},' for station ', namestr, ' 2015'])
out_file=[output_path,'\',namestr,'\',strrep(vars{1},' ','_'), '\T_plot_2015.jpg'];
saveas(fig,out_file)
(I added ‘hf1’ for this illustration.) Here, ‘fig’ is a handle to a line object, not a figure object, and ‘hf1’ is a handle to the figure object.
Consider the differences between ‘hf1’ and ‘fig’.
Yes, it¹s complicated. So is everything else you will ever encounter!
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Ivan Spector
il 5 Mag 2022
BOOM! Thanks. I was using 'imread' so I'm not sure why it didn't strike me to use this. Thank you very much.
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Geoff Hayes
il 16 Gen 2020
Daphne - from saveas, the first input parameter is a handle to the figure. You've named this fig in your code, but it seems to be the handle to the plot graphics object instead
for k = 1:365
index = doy == k; %An to doy isoutai me k, tote o index einai alithis (=1). Pseudis=0
B(k,1) = k;
B(k,2) = mean(A.ToutoC(index));
fig = plot(B(:,1),B(:,2)); % <------ fig is a handle to the plot graphics object
ylabel([vars{1},' (',varunits{1},')'],'fontsize',12,'fontweight','bold')
xlabel( 'Day of year')
title(['Mean daily ', vars{1},' for station ', namestr, ' 2015'])
out_file=[output_path,'\',namestr,'\',strrep(vars{1},' ','_'), '\Mean_Daily_T_2015.jpg'];
saveas(fig,out_file)
end
Try using
saveas(gcf,out_file)
Out of curiosity, do you mean to be creating a file on each iteration of the loop? Your file name seems to be the same on every iteration so you would just be overwriting the file each time you call saveas. Perhaps you want to just write to file after all 365 iterations have been completed? If so, see hold which will retain the current plot (if that is what you need or want to do).
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