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Suppose the user inserts an integer n and a date string '1/1/2015' (stands for Jan 1 2015), then how do I find the date that is n days before Jan 1 2015?

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Shawn Miller
Shawn Miller 2015-12-17
关闭： MATLAB Answer Bot 2021-8-20
It seems minus sign doesn't work. Any date function can help?
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jgg
jgg 2015-12-17
A string does not work with the minus sign, as you'd expect. You need to convert the string to a number, subtract your n, then convert it back to a date string to output. Take a look at Matlab's date functions to see how to do this.

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Walter Roberson
Walter Roberson 2015-12-18
d = datetime('1/1/2015', 'InputFormat', 'M/d/Y');
d - days(n)

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