Diary file with current date and time as time stamp

Question

superkevin2009 2016-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/302949-diary-file-with-current-date-and-time-as-time-stamp

评论： Futurist4Science 2017-10-10

I've used the diary command for years, but would now like to make the filename time specific depending on the current date and current time. How can I do that? I tried searching for this answer but couldn't seem to find anything.

Something like 9-13-2016-1529.txt

When I try to make a string out of the date (and call it say dfile) and type in diary dfile, it just creates a file called dfile.

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Answer 1

Fangjun Jiang 2016-9-13

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编辑：Fangjun Jiang 2016-9-13

在 MATLAB Online 中打开

dfile=[datestr(now,'mm-dd-yyyy'),'-1529.txt'];
diary(dfile);

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superkevin2009 2016-9-13

This is a start, but how can I get the time in there as well? 15-29 was supposed to correspond to 3:29 pm (I figure colons won't work in filenames).

Steven Lord 2016-9-13

在 MATLAB Online 中打开

N = datetime('now')
N.Format = 'MM-dd-yyyy-HHmm'
s = char(N)

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Answer 2

Futurist4Science 2017-9-26

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编辑：Futurist4Science 2017-10-10

在 MATLAB Online 中打开

I required the same functionality so I wrote a shortcut script.

% Turn On Diary Logging
diary off 
% first turn off diary, so as not to log this script
diary_filename=['CommandWindowLog',datestr(now,30)];
% setup temp variable with filename + timestamp, echo off
set(0,'DiaryFile',diary_filename)
% set the objectproperty DiaryFile of hObject 0 to the temp variable filename
clear diary_filename
% clean up temp variable
diary on
% turn on diary logging

I tested it and it works!

example file name output: CommandWindowLog20170926T134629

You can also change the format of the desired timestamp per the arguments for >>datestr in the help file.

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Jan 2017-9-26

编辑：Jan 2017-9-26

在 MATLAB Online 中打开

This works as expected in R2016:

diary off 
filename = ['CommandWindowLog', datestr(now,30)];
diary(filename);

The wanted file is created and the diary is written to it. What do you mean by

>>diary(filename) will not pass
variables for the timestamp to work as of Matlab R2014b"

? What do you expect to passed where?

Futurist4Science 2017-10-10

Jan,

Thanks for the comment, I tested it again and it must have been a syntax entry issue that precipitated the comment note. I removed it.

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Answer 3

Steven Lord 2016-9-13

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在 MATLAB Online 中打开

Use the function form of diary. For demonstration purposes I'll use help instead of diary but the idea is the same.

fun = 'sin';
help(fun) % function form, displays help for the function whose name is stored in the variable fun
help fun % command form, displays help for the function named fun (if it exists)
help sin % command form, displays help for the function named sin