search for: polymonial

...y idea please? Thanks, --- On Wed, 13/10/10, Ron_M <ron_michael70@yahoo.com> wrote: From: Ron_M <ron_michael70@yahoo.com> Subject: [R] Problem to create a matrix polynomial To: r-help@r-project.org Date: Wednesday, 13 October, 2010, 4:31 PM Dear all R users, I was trying to create a polymonial using the polynom() of "PolynomF" package. My problem is, if I pass coefficients as simple numerical values, it is working, but for matrix coefficient it is not. Here is my try: library(PolynomF) z <- polynom() ## following is working p1 <- 1- 4.5*z ## However following is not gi...

Hi, I have a question about derivatives of functions. if i have the following function, f <- function(x) x^3-2*x^2+3*x-5 i need a simple function for the derivative of this with respect to 'x', so that i can then sub in values to the the derivative function, and use Newtons method of finding a root for this. Please help. Regards, Kon Knafelman

...02:31:54 -0700 (PDT) From: Ron_M <ron_michael70 at yahoo.com> To: r-help at r-project.org Subject: [R] Problem to create a matrix polynomial Message-ID: <1286962314278-2993411.post at n4.nabble.com> Content-Type: text/plain; charset=us-ascii Dear all R users, I was trying to create a polymonial using the polynom() of "PolynomF" package. My problem is, if I pass coefficients as simple numerical values, it is working, but for matrix coefficient it is not. Here is my try: library(PolynomF) z <- polynom() ## following is working p1 <- 1- 4.5*z ## However following is not gi...