[R] equal

2005-10-28 Thread Sam R. Smith
using the same a and b, why solve(a,b) get a 1 by n matrix while solve(a)%*%b get a n by 1 matrix. I thought they should be equal to each other... __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the

[R] solve error

2005-10-28 Thread Sam R. Smith
w [,1] [,2] [,3] [,4] 1:1 0.0 0.5 0.5 0.0 2:1 0.5 0.0 0.0 0.5 1:2 0.5 0.0 0.0 0.5 2:2 0.0 0.5 0.5 0.0 solve(w) Error in solve.default(w) : Lapack routine dgesv: system is exactly singular what does the error mean? __

[R] inverse matrix

2005-10-27 Thread Sam R. Smith
if solve(a,b) means to calculate an inverse matrix of a with b, and i wonder why solve(a)%%b will get different result? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide!

[R] Fortran?

2005-10-14 Thread Sam R. Smith
In a package, i type a function name and got the following message: ... tmp - .Fortran(master, x = as.double(x), y = as.double(y), sort = as.logical(sort), rw = as.double(rw), npd = as.integer(npd), ntot = as.integer(ntot), nadj = integer(tadj), madj = as.integer(madj),

[R] function

2005-10-13 Thread Sam R. Smith
In a package, i type a function name and got the following message: ... tmp - .Fortran(master, x = as.double(x), y = as.double(y), sort = as.logical(sort), rw = as.double(rw), npd = as.integer(npd), ntot = as.integer(ntot), nadj = integer(tadj), madj = as.integer(madj),

[R] plot

2005-10-09 Thread Sam R. Smith
After I made a new plot, the old plot can not be found. How can I check all the plots I have made? - [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list

[R] line

2005-10-09 Thread Sam R. Smith
There are four points with coordinates: 2,3;4,9;1,6;3,10. How to use Python to draw one perpendicular bisector between (2,3) and (4,9); the other perpendicular bisector between (1,6)ºÍ(3,10); then, makes the output like: l1 a b c l2 a b c (Note: l indicates the perpendicular bisector with equation

Re: [R] line

2005-10-09 Thread Sam R. Smith
Sorry for the typo, ask for R code. Sam R. Smith [EMAIL PROTECTED] wrote:There are four points with coordinates: 2,3;4,9;1,6;3,10. How to use Python to draw one perpendicular bisector between (2,3) and (4,9); the other perpendicular bisector between (1,6)ºÍ(3,10); then, makes the output like: l1

[R] color for points

2005-10-08 Thread Sam R. Smith
Hi, I have the following code to randomly generate the points: csr -function(n=60){ x=runif(n) y=runif(n) f=cbind(x,y) } plot(csr()) I wonder how to code to make the first twenty points to be BLUE; second twenty points to be RED; the last twenty points to be GREEN? Thanks, Sam

[R] square and points on the same figure

2005-10-08 Thread Sam R. Smith
Hi, I have the following code to randomly generate the points: csr -function(n=60){ x=runif(n) y=runif(n) f=cbind(x,y) } plot(csr()) I wonder how to code to draw a square centering on 0.5,0.5; with the length of each side to be 0.3 on the same figure with these plotted points? Thanks, Sam

[R] square and points on the same figure

2005-10-08 Thread Sam R. Smith
Hi, I have the following code to randomly generate the points: csr -function(n=60){ x=runif(n) y=runif(n) f=cbind(x,y) } plot(csr()) I wonder how to code to draw a square centering on 0.5,0.5; with the length of each side to be 0.3 on the same figure with these plotted points? Thanks, Sam

Re: [R] square and points on the same figure

2005-10-08 Thread Sam R. Smith
after typing symbols(x=0.5, y=0.5, squares=c(0.3), add=TRUE) it works. I want to add one more using different length such as symbols(x=0.5, y=0.5, squares=c(0.15), add=TRUE) but this square did not show. Chuck Cleland [EMAIL PROTECTED] wrote: Sam R. Smith wrote: Hi, I have the following code