Re: [R] wire.frame tick labels from matrix

From: Sundar Dorai-Raj <sundar.dorai-raj_at_pdf.com>
Date: Fri, 15 Feb 2008 11:53:52 -0800

Marlin Keith Cox said the following on 2/15/2008 11:39 AM:
> Dear R Users, close to the end of this I used wireframe to create a 3D plot
> from a matrix. The x and y axis tick labels (1-6) for each were created
> from the matrix being a 6X6 matrix. I need the axis tick labels to be the
> row and column headings which you can see in the output (mat.x). I have
> tried several work arounds, but they have not been successful.
>
> Thanks in advance. keith
>
>
> rm(list=ls())
> sen<-read.csv("brooktroutsort.csv")
>
> #Resistance
> R=c(660, 548, 676, 763, 768, 692, 657, 630, 748, 680, 786, 645, 710, 677,
> 692, 732, 737, 651, 396,
> 601, 640, 448, 464, 472, 434, 487, 495, 426, 429, 456)
>
> #Detector length
> Lend=c(37.0, 39.0, 39.0, 39.0, 40.0, 41.5, 44.0, 45.0, 46.0, 47.0,
> 47.0, 48.0,
> 48.5, 49.0, 51.0, 53.0, 53.0, 60.0, 89.0, 103.0, 108.5, 118.0, 118.0,
> 123.0,
> 126.0, 138.0, 139.0, 141.0, 141.0, 151.0)
>
> #Errors to be multiplied by Restistance
> x=c(0,.05,.10,.15,.20,.25)
>
> #Errors to be multiplied by Detector length
> y=c(0,.01,.02,.03,.04,.05)
>
> #equation to predict water weight in grams
> a=3.453*((Lend^2)/R)+1.994
>
> X=(R%o%x+R)
>
> Y=((Lend%o%y+Lend)^2)
>
> num.x.col <- length(X[1,])
> num.y.col <- length(Y[1,])
> num.rows <- length(X[,1])
>
> Z <- matrix(nrow=num.rows, ncol=num.x.col*num.y.col)
>
> for( i in 1:num.rows) {
> Z[i,] <- as.vector( Y[i,] %*% t(X[i,])^-1 )
> }
>
> pred.est <- 3.453*Z+1.994
> z=(pred.est-a)/a
>
> colnames(z)<- rep(c("X1","X2","X3","X4","X5","X6"),6)
>
> meanz=colMeans(z)
> mat.x <- matrix(meanz, nrow=6, ncol=6, byrow=TRUE)
>
> colnames(mat.x)<- c(0,1,2,3,4,5)
> rownames(mat.x)<-c(0,5,10,15,20,25)
> mat.x
>
>
> library(lattice)
> wireframe(mat.x,drape=TRUE,zlab=list("Proportion Error of Estimate",
> rot=90), xlab="Resistance Error (%) ",ylab="Length Error
> (%)",scale=list(arrows=FALSE))
> detach(z)
> detach(sen)
>
>

Try:

mat.df <- data.frame(z = as.vector(mat.x))
mat.df$x <- rep(c(0,5,10,15,20,25), each = 6)
mat.df$y <- rep(c(0,1,2,3,4,5), times = 6)

library(lattice)
wireframe(z ~ x * y, mat.df,

           drape = TRUE,
           zlab = list("Proportion Error of Estimate", rot=90),
           xlab = "Resistance Error (%) ",
           ylab = "Length Error (%)",
           scales = list(arrows = FALSE))

HTH, --sundar



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