Append current date to filename

Hello everyone,

I have a simulink code which writes a structure called 'state' to the workspace containing multiple outputs which I would like to save to a .mat file by running a post processing script, eventually through a callback function. I am currently trying to append the current time and date to the output file. I have gotten the file to save in the specified location but have been unable to append the current date/time to the file name. I have included the path because I would like to save the output files to their own folder, not simply the current folder.

This was my latest attempt..

Any help would be appreciated.

Cheers!

t = datetime('now', 'Format','yyyy_MM_dd,HH_mm');
DateString = datestr(t)
FileName=[DateString,' Output ','JohnSmith']
save('/Users/John/Desktop/Project1/Matlab Model/'FileName,'state')

[najusten]

UPDATE: I have gotten the file to save with the current date using the following code:

t = datetime('now','Format','yyyy-MM-dd''_T''HHmmss')
t2 = datevec(t)
DateString = datestr(t2)
FileName=[DateString,' Output ','JohnSmith']
save( fullfile('/Users/John/Desktop/Project1/Matlab Model/', FileName) )

My issue now is that I want the files to save in the format specified using datetime, namely 'yyyy-MM-dd', however whenever I convert the files using DataString, Matlab converts them to the format:

'30-Mar-2019 13:29:35 Output JohnSmith'

This messes up the file ordering. What is the best way to prevent this? I could not get the 'datenum' or 'datevec' commands to work as suggested by some of the threads I was reading.

Thanks!

[najusten]

Well would you look at that..

S = char(t);
FileName=[S,' Output ','JohnSmith']

Seems to solve my problems. Legitimately tried to get this to work for 2 hours last night.. In my defense it was late.