Re: [R] inverse of matrix made by low.tri function

You missed one very important line: > library(Matrix) This is not R, it is package Matrix, and the error is in that package, as traceback() shows: > traceback() 6: sprintf(gettext(fmt, domain = domain), ...) 5: gettextf("not-yet-implemented method for %s(<%s>, <%s>).\n ->> Ask the package aut

[R] inverse of matrix made by low.tri function

Hi all, I am using R trying to get a inverse matrix of (X^T)X , but I keep getting the error message like: no b argument and no default value for sprintf(gettext(fmt, domain = domain), ...) . # my code