Auto generate variable name and save to file?

Question

Huseyin 2014-5-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/130238-auto-generate-variable-name-and-save-to-file

评论： Alvindra Pratama 2016-6-13

Hi,

I'am working on GUI and have a file named 'work.mid' .I made some applications on it and want to save it as 'work1.mid' when I click the save button automatically to 'c:\saved_datas\. And when I click that button second time, I want to save it as 'work2.mid', on the third time 'work3.mid' etc. The function must work like that on the background. Simple the code is,

 nmat=readmidi_java('work.mid');
 Name = fullfile('c:\saved_datas\', '?????' );
 writemidi_java(nmat,Name);

At '?????', there should be a variable like N, so 'workN.mid' will be saved like work1.mid, work2.mid...

Thanks

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Answer 1

Image Analyst 2014-5-20

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/130238-auto-generate-variable-name-and-save-to-file#answer_137481

在 MATLAB Online 中打开

Just make a global variable called datasetNumber or something. Then create the file name

global datasetNumber;
baseFileName = sprintf('work%d.mid', datasetNumber);
fullFileName = fullfile('c:\saved_datas\', baseFileName);
datasetNumber = datasetNumber +1; % Increment for next time.

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

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Alvindra Pratama 2016-6-13

在 MATLAB Online 中打开

i have code like this :

    global datasetNumber;
    img = getframe(gca);
    baseFileName = sprintf('%d.jpg', datasetNumber);
    filename = fullfile(fullfile('H:\SKRIPSI\Citra Latih 2\', baseFileName));
    imwrite(rgb2gray(img.cdata),filename,'jpg');
    datasetNumber = datasetNumber +1; % Increment for next time.

I want to save an image from an axes, when I save by using the code above, each of the image does not have a file name. I want to save the image that have a file name like 1.jpg, 2.jpg, 3.jpg, and so on without any restrictions in the store a lot of images. how can I make that?

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