mkdir and simulations problems

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Giuseppe Pintori
Giuseppe Pintori 2019-9-10
编辑： Stephen23 2020-1-1
Hi guys, I have a problem.
What I need is to create a code which is able, for every simulation, to:
  • create a "numbered" folder (like Try_1, Try_2, ecc)
  • inside the folder save two plots and a variable
  • every time I press the run button should go to next folder and do it again
Also, it will be simple without for loops because I need to put all in a really heavy code.
Thank you!
PS : sorry for my bad english.
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Stephen23
Stephen23 2019-9-10
编辑：Stephen23 2019-9-10
"the problem comes whe I try to add the figure and save it"
What exactly is the problem? What happens when you try your code?
Note that you should use fullfile rather than concatenating strings (it takes care of the path separators for you).
Giuseppe Pintori
Giuseppe Pintori 2019-9-10
编辑：Giuseppe Pintori 2019-9-10
Guys, mine was just a request for help and I don't want it to be taken as a claim or something; if I did imply this, I apologize.
However, the error in question is the following:
Error using saveas
Invalid or missing path: C:\Users\nator\Desktop\aaa\foldername15\15\1
Error in Untitled
saveas (gcf, picturename, 'jpg')
Unfortunately I don't have a lot of expertise with Matlab, so I don't really know how to act
" followed by two lines of code that create a different folder in an arbitrary location"
Not using the two lines of code does not create the "numbered" folders

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Stephen23
Stephen23 2019-9-11
编辑：Stephen23 2020-1-1
You can download my FEX submission nextname:
https://www.mathworks.com/matlabcentral/fileexchange/64108-next-available-filename
And simply use it like this:
D = nextname('prova','1','');
mkdir(D)
plot(rand(10,1))
saveas(gcf,fullfile(D,'1.jpg'));
plot(rand(10,1))
saveas(gcf,fullfile(D,'2.jpg'));

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Guillaume
Guillaume 2019-9-10
编辑：Guillaume 2019-9-10
As far as I can see the problem has nothing to do with matlab expertise but is a failure in your logic.
You create a folder name, which would be better achieved with:
k = ...
path = 'C:\Users\...\'; %note that path is also a matlab function. Another name would be better
foldername = fullfil(path, sprintf('prova%02', k));
Then you create another name with different formatting in the variable named prova. The above code will generate the name c:\Users\....\Prova01 for k = 1, whereas prova will be Prova1. Note the missing 0. You then forget about that foldername and mkdir that Prova1. Since prova is not a full path, it will be created in the current folder, whatever that is, most likely not path.
So, in addition to creating a folder with the different name you intended, you also create it in a different location. So, it's not surprise that when saving your figure, matlab tells you: sorry, that folder doesn't exist.
mkdir(foldername);
would probably solve the problem. There's never any need for that prova variable.
While we're at it, it would be clearer if you created picturename as:
picturename = fullfile(foldername, '1.jpg'); %explicitly add the extension
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Giuseppe Pintori
Giuseppe Pintori 2019-9-11
%clear
% k = 1
foldername = fullfile(pwd, sprintf('prova',k));
if exist(foldername, 'dir')
mkdir("prova"+k);
provab = "prova" +k;
cd(provab)
else
mkdir ( foldername );
end
figure('visible','off')
plot(rand(10,1))
saveas(gcf,'1','jpg');
%
figure('visible','off')
plot(rand(10,1))
saveas(gcf,'2','jpg');
%
save('k','k')
k=k+1
cd ../
I am currently using this code; in this case, however, it is not efficient. In fact, after the first simulation, it is necessary to comment k = 1
Guillaume
Guillaume 2019-9-11
What are you trying to achieve with this:
if exist(foldername, 'dir')
mkdir("prova"+k);
provab = "prova" +k;
cd(provab)
else
mkdir ( foldername );
end
In particular, why have you got two different variables for the folder name, foldername and provab.

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