[R] wire.frame tick labels from matrix

[Deepayan Sarkar]

On 2/15/08, Sundar Dorai-Raj <sundar.dorai-raj at pdf.com> wrote:
>
>
>  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))

A shortcut is

wireframe(mat.x, drape = TRUE, scales = list(arrows = FALSE),
          xlim = rownames(mat.x), ylim = colnames(mat.x))

It probably makes sense to do this automatically for the matrix method.

-Deepayan