How to make filename that message + date&time using [imwrite function].

2018 6 5
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更新时间：2018 6 5
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The MATLAB code is {imwrite(red, datestr(now,'yyyy-mm-dd HH-MM-SS-FFF'),'png');}
I want to make file name "test_yyyy-mm-dd HH-MM-SS-FFF".png
Please, Let me know the method.
Thanks.

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Kodavati Mahendra
编辑：Kodavati Mahendra 2018-6-5

1 个投票

filename = strcat(datestr(now,'yyyy-mm-dd HH-MM-SS-FFF'),'.png');
imwrite(red, filename);
Solved? Problem was with the syntax for imwrite :-)
Edit 1:
filename = strcat('Test_',datestr(now,'yyyy-mm-dd HH-MM-SS-FFF'),'.png');
imwrite(red, filename);
Now?

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Junwon Park
Junwon Park 2018-6-5
Not yet. I need file name that is "message(such as Test_)" + "Date & Time".
File name is: Test_2018-06-05 10-01-40-954.png
Thank you for your reply.
You can just add your message string to the strcat function
Stephen23
Stephen23 2018-6-5
编辑：Stephen23 2018-6-5
@Junwon Park: using sprintf is often clearer than concatenating strings:
filename = sprintf('Test_%s.png',datestr(now,'yyyy-mm-dd HH-MM-SS-FFF'));

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