How does Fortran90 saves matrices and how does Matlab reads them?

Hi,

I try to understand the following three lines of Fortran code, as I am trying to recalculate a paper from Christina Arellano without using Fortran as I don't have access to it at our university.

"open (unit=9, file="C:\Arellano\default\sav.f90", position="rewind")

write (9, *) sav

close (unit=9)"

I get that it is used to save the matrix "sav" to the file "sav.f90".

But how is it saved exactly?

"sav" is a 21 times 200 matrix.

Are the numbers of the matrix still in matrix from or are the numbers saved in one big vector?

She then uses this data for a Matlab code.

She introduces the data with the following line:

"sav=dlmread('c:\Arellano\default\sav.f90','');"

How does now "sav" look like in Matlab?

Thanks for your help.

Best regards, Frédérique