how do I save a double array in matlab to file as full precision double numbers?

Question

mahaju 2013-9-10

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https://ww2.mathworks.cn/matlabcentral/answers/86750-how-do-i-save-a-double-array-in-matlab-to-file-as-full-precision-double-numbers

评论： Mohamad Mossad 2020-2-9

在 MATLAB Online 中打开

I have an array of double variables which I save into a file using the command

save windparam.dat awindow -ascii

The array contains these values (using format long):

005000000000000
005008727005636
005034902724414
005078511265159
005139526153297
However, they are saved in the file as shown below:
0000000e-003
0087270e-003
0349027e-003
0785113e-003
1395262e-003

How can I get to save in the file in the same format as is shown in Matlab?

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Answer 1

Walter Roberson 2013-9-10

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https://ww2.mathworks.cn/matlabcentral/answers/86750-how-do-i-save-a-double-array-in-matlab-to-file-as-full-precision-double-numbers#answer_96279

在 MATLAB Online 中打开

save windparam.dat awindow -ascii -double

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Mohamad Mossad 2020-2-9

only one that worked, 7 years later xD

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Answer 2

Azzi Abdelmalek 2013-9-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/86750-how-do-i-save-a-double-array-in-matlab-to-file-as-full-precision-double-numbers#answer_96273

编辑：Azzi Abdelmalek 2013-9-10

在 MATLAB Online 中打开

a=[0.005000000000000
   0.005008727005636
   0.005034902724414
   0.005078511265159
   0.005139526153297]
b=sprintf('%.15f\n',a)

If you want to save in a text file

fid=fopen('file1.txt','w');
b=fprintf(fid,'%.15f\n',a)
fclose(fid)

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Jan 2013-9-10

编辑：Jan 2013-9-10

+1, While the -double flag solves the problem for the save command, I'd prefer this approach based on fprintf, because it offers full control of the format.

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