Problem by saveas plot

Hi everyone, I do not understand what I'am doing woring in saving my plot.

My code:

Temp=[num2str(vaiable), 'Myplotnumber' ,num2str(n) ,'-dpng']; 
saveas(gcf,Temp);

it save the figure always with Var1Myplotnumber2.png.fig

why put matlab .fig at the end?

Thank you?

[Ive J]

Use print.

doc print

[CSCh]

If I use print(gca, Temp)

I got:

Error using alternatePrintPath

Invalid or unsupported printer '' specified.

Error in print (line 83)

pj = alternatePrintPath(pj);

[Ive J]

Pass gcf and not axes

print(gcf, 'test', '-dpng', '-r400')

Answer 1

[CSCh]

Thank you all so much for your help. In my case the '-dpng' ending did not work.

if I change to:

Temp=['%MyName%' ,'.png'];

saveas(gcf, Temp)

it saves png format.

BR

Answer 2

[Image Analyst]

Use exportgraphics() instead if you have R2020a or later.

[CSCh]

If I use

exportgraphics(f,Temp)

i got this error

Error using exportgraphics

When exporting to file specify both a file name and extension.

Hoewever Temp = "Var1Myplotnumber2.png" is working in the command line.

If I use:

hgexport it works without error, but I got:

Var1Myplotnumber2.png.eps

[CSCh]

With f= figure(1)

[Image Analyst]

How about if you do this:

g = gcf; % Or gca, whatever you want.
exportgraphics(g, Temp);

[CSCh]

Got the same error message

[Image Analyst]

Try this code in a simple script or in the command window.

plot(1:11, 'b-', 'LineWidth', 2);
fullFileName = fullfile(pwd, 'Delete me.png');
exportgraphics(gcf, fullFileName);

Does it create the file? For me it does.

[CSCh]

Yes that works for me, but why does not my code work? Maybe something with my loop (num2str (n)), I have to check..

[Image Analyst]

I don't know. You never showed me your exportgraphics() code that didn't work. You only showed it where it worked in the command window with a hard-coded filename string. Please post the non-working code from your m-file. Apparently it thinks your Temp did not have an extension on it. Are you sure Temp ends in '.png'?

Answer 3

[Walter Roberson]

Temp = {sprintf('%dMyplotnumber%d.png', vaiable, n),'-dpng'};
saveas(gcf, Temp{:})

Answer 4

[Image Analyst]

You can do

baseFileName = sprintf('%d Myplotnumber %d.png', variable, n); % Name without folder.
fullFileName = fullfile(yourFolder, baseFileName); % Prepend folder.
saveas(gcf, fullFileName);