Export mata from stata to txt

[Clara Etcheverry]

Hi everyone!
Do you know how to export a matrix that I did in stata with mata into a txt file? Thank you !
Best,
Clara

[Niels Henrik Bruun]

Dear Clara
Could you elaborate on your problem? Eg create some example code showing what you have?

[Clara Etcheverry]

I have create a matrix (called S, explained in the last post here https://www.statalist.org/forums/for...se-of-matrix); I would like to export it in a text document in order to inverse this matrix in another software (it does not work with stata as I explained in the last post).
Clara

[Niels Henrik Bruun]

Dear Clara
Your does not work.

[Clara Etcheverry]

Oh Sorry! https://www.statalist.org/forums/for...erse-of-matrix

[Mike Lacy]

To save any other responders needing to get the context from other posts, I'm answering this question as: "I have a Mata matrix. How do I save it to a text file?"

While there's doubtless a direct Mata way to do this, an easier solution for me is to get the Mata matrix into a Stata data set, and then export the Stata data set. Note that -export delimited- gives you control over formatting and the like of the text file you create. I've chosen to delimit the file with spaces (rather than tabs, commas, etc.), and to use the variables' default display format. This could be done as a Mata call to a Stata command, but I'm presuming that this export will likely be wanted after the Mata code is done, so I figured doing the export directly from Stata would be ok:

clear
// Example matrix
mata: S = runiform(200,200)
//
// preserve Stata data here if desired
clear
getmata SS* = S
export delimited SS* using "c:/temp/mymatrix.txt", ///
   delimiter(" ") novarnames nolabel datafmt replace
// restore Stata data here if necessary

[Clara Etcheverry]

Thank you very much !