Solve Eror Saveas nome

Question

MartinM 2023-2-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1915630-solve-eror-saveas-nome

评论： Rik 2023-2-21

在 MATLAB Online 中打开

Hello

I try to save figure gcf, in different folder.

Each loop a figure, in a new folder.

name = [ "Pedestal_AC"
"Pc_Ecart"
"ratioE2FWHM"
"ratioDT_AC"
"lim75E_AC"
"RatioI"]
kk=1;
    for zz=1:6%length(name)
        folder = convertStringsToChars(name(zz));
if ~isdir(folder)
    mkdir(folder);
end
cd (folder)
    
        frame = getframe(zz);
        im = frame2im(frame);
        [imind,cm] = rgb2ind(im,256);
        figure(zz)
%          saveas(gcf,[convertStringsToChars(name(zz)) '\'  strcat(num2str(kk),'.png')])
                 saveas(gcf,[  num2str(kk)  '.png'])
    end
    

If I run [ num2str(kk) '.png'] , it provides me : '1.png'

but if I run the code :

Error using matlab.graphics.internal.name (line 112)
Cannot create output file '.\1.png'.

Can not understand

If you have solution I will take it

regards

1 个评论
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Walter Roberson 2023-2-20

note that you never cd back.

You should avoid using cd. Use fullfile(folder, kk+".png")

Also you are assuming that if the folder already exists that you have permission to write into it, which might not be true

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Answer 1

Rik 2023-2-20

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1915630-solve-eror-saveas-nome#answer_1175625

Perhaps you meant saveas(gcf,[num2str(zz) '.png']) instead, since you never define kk in your code.

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MartinM 2023-2-20

I have try

saveas(gcf,[sprintf('%1d',kk),'.png'])

saveas(gcf,[convertStringsToChars(name(zz)) '\' strcat(num2str(kk),'.png')])

Rik 2023-2-21

在 MATLAB Online 中打开

Neither of those should result in the error you posted. Perhaps you want something like the code below.

Do you see how the indentation already cleans up your post? Now you only need to write comments explaining why you're using this code.

name = [ "Pedestal_AC"
    "Pc_Ecart"
    "ratioE2FWHM"
    "ratioDT_AC"
    "lim75E_AC"
    "RatioI"];
if numel(unique(name))~=numel(name) % check for duplicates
    error('this will result in overwritten files')
end
kk=1;
for zz=1:numel(name)
    folder = convertStringsToChars(name(zz));
    if ~isdir(folder)
        mkdir(folder);
    end
    filename = fullfile(folder,strcat(num2str(kk),'.png'));
    
    f = figure(zz);
    if zz==numel(name) % since these all get overwritten, we only need to do the last
        frame = getframe(f);
        im = frame2im(frame);
        [imind,cm] = rgb2ind(im,256);
    end
    saveas(f,filename)
end
this call to saveas will write the file Pedestal_AC/1.png
this call to saveas will write the file Pc_Ecart/1.png
this call to saveas will write the file ratioE2FWHM/1.png
this call to saveas will write the file ratioDT_AC/1.png
this call to saveas will write the file lim75E_AC/1.png
this call to saveas will write the file RatioI/1.png
function saveas(f,fn)
% Overload saveas to show what would happen
if exist(fileparts(fn),'dir')
    fprintf('this call to saveas will write the file %s\n',fn);
else
    fprintf('an error will occur')
end
% close the figure to avoid cluttering the post with empty images
close(f);
end