search for: ginverse

...1 -1 -1 2 1 -1 -1 3 0 2 -1 4 0 0 3 The constraint vector is clearly v= (1,1,1,1), since the columns add to zero. In this case the columns are also mutually orthogonal, so the matrix (C'C^{-l} C' (the generalized inverse of C) has a similar form apart from a few row divisors: >fractions(ginverse(contr.helmert(4))) [,1] [,2] [,3] [,4] [1,] -1/2 1/2 0 0 [2,] -1/6 -1/6 1/3 0 [3,] -1/12 -1/12 -1/12 1/4 (ginverse() will be available in S+4.0 and fractions(), now available in the MASS2 library, simply displays numbers in fractional form so that patterns are more obvious). Thus the phi's ar...

Hi, I'm actually afraid that this is a RTFM question - I read the manual but didn't find anything yet... I'm looking for a way to document R sourcecode in my thesis. Does anyone know of a tool or function which can convert or export R sourcecode to Tex? Thanks for any hints! Best Regards, Daniel

Dear R community Have just recently got back into R after a long break and have been amazed at how much it has grown, and how active the list is! Thank you so much to all those who contribute to this amazing project. My question: I am trying to calculate Mahalanobis distances for a matrix called "fgmatrix" >dim(fgmatrix) [1] 76 15 >fg.cov <- cov.wt(fgmatrix)

Hi, I'm trying to use the solve() function in R to invert a matrix. I get the following error, "Lapack routine dgesv: system is exactly singular" However, My matrix doesn't appear to be singular. [,1] [,2] [,3] [,4] [1,] 0.99252358 0.93715047 0.7540535 0.4579895 [2,] 0.01607797 0.09616267 0.2452471 0.3088614 [3,] 0.09772828 0.58451468 1.4907090