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hello all, thank you for taking the time I have a matrix A that have column names (let say n columns), I want to reduce the matrix to have just a few of those column (p colums, this is trivial), but for the lines I want only the lines such that A(i,J) is part of a list (J is fixed and known) I am sure it is very easy but I don't find it (I tryed which but it doesn't seem to work) Surely

Hello Folks, I want to install new version of samba but have already old version of samba which came with Linux 8.0. Please advise, I want to install new version of samba ... How would I un-install old version which came with Linux8.0 ? Do i really need to do so, in order to install new version of samba ? Do i reallly need to remove any files or pkgs before i install new version ? which ?