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date into double then back to date in loop

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I imported dates from an Excel file called original as below:
date =table2array(original(:,1));
datedouble= datenum(date);
I have a for-lop with a for loop variable j such that:
a(j+1,1)= datedouble(j+1,1);
My question: this for loop stores serial number of the date, and I want to conver this back to the dates. I tried datestr(datedouble(j+1,1)), but it says the dimension doesn't matach as it is some sort of 1x10 on the right hand side and left hand side is 1x1.
How can I resolve this?
Thanks!

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Accepted Answer

Sean de Wolski
Sean de Wolski on 25 Nov 2019
Edited: Sean de Wolski on 25 Nov 2019
You should really look at creating a datetime and using its various properties and methods instead of datenum or datestr.
Can you provide a small data set of what you have and what you want?

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Tatte Berklee
Tatte Berklee on 25 Nov 2019
The issue I am having is a is K by L doubles.
I am running a for-loop in each row, so I store the date.
The issue is I am storing as serial numbers and as in double.
But I want this to change to the actual dates for ease of display when I plot.
So I tried datestr() function to convert back to characters.
When I try to store this into the entry in my for-loop, I get the following error:
Unable to perform assignment because the size of the left
side is 1-by-1 and the size of the right side is 1-by-20.
Help?

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