Hi all,

In Excel, i'd usually use power query to unpivot columns and then copy the data into stata, however, i'm working with daily stock return data over a 25 year period, so Excel is unable to unpivot this much data. I understand that I could potentially do this on stata by using the reshape command to convert the data from wide to long, but i'm unsure how?

Apologies that i'm not really sure how to use dataex, but my data has company names in the top row, and the left hand column is a list of dates. My aim is to go from something like:

Company A Company B
31/12/2019 0.05 0.04
30/12/2019 0.05 0.04
…

To

Company A 31/12/2019 0.05
Company A 30/12/2019 0.05
Company B 31/12/2019 0.04
Company B 30/12/2019 0.04

I have to do this for a large number of dates and company names, so any advice would be greatly appreciated!