Exporting data to excel every time a program is run
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I want to be able to write data to an excel spreadsheet after running a program. I know how to do this once, but I want to be able to run the program many times and add the data to excel each time, without overwriting the previous data in the spread sheet. For example:
a = x^2;
If I run this for x=1, I can get my answer and export it to excel ok. But if I run the exact same program again for x=2, I want it to write the answer to the same spreadsheet as the first one without overwriting the original data. My program is much more complex than this obviously but I want to get a general sense of how it's done.
I would prefer methods that don't involve any loops.