Re: [R] functions for polynomial and rational interplation?

Bill, Thank you for the correction; yes, Nevilles' is an algorithm to produce the same Lagrange interpolating polynomial. And thank you for the polynomF package! Don Slowik -- View this message in context: http://r.789695.n4.nabble.com/functions-for-polynomial-and-rational-interplation-tp359533

[R] functions for polynomial and rational interplation?

Are there implementations of, e.g. Neville's algorithm, for interpolating polynomials through some data points? Nevilles' is an improvement on Lagrange interpolation. And how about interpolating rational functions? I could not find anything at rseek.org or at crantastic.org. thanks -- View this me

Re: [R] Finding solution set of system of linear equations.

Thanks Robert. That all seems to work. I also found the MASS::Null() function that gives the null space for the matrix(transpose) given as argument. I am still trying to appreciate the math behind the Moore-Penrose inverse matrix. If you have any suggestions for understanding how to use R to solve

Re: [R] nls package

nls is part of the stats 'package'. -- View this message in context: http://r.789695.n4.nabble.com/nls-package-tp3541485p3541502.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mai

[R] Finding solution set of system of linear equations.

I have a simple system of linear equations to solve for X, aX=b: > a [,1] [,2] [,3] [,4] [1,]1211 [2,]3004 [3,]1 -4 -2 -2 [4,]0000 > b [,1] [1,]0 [2,]2 [3,]2 [4,]0 (This is ex Ch1, 2.2 of Artin, Algebra). So, 3 eqs