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# ----- Define a function for plotting a matrix ----- #
matrixPlot <- function(x, fac=TRUE, ...){
#if matrix of factors convert to numeric
if(fac)
x<-apply(x,c(1,2),as.numeric)
min <- min(x)
max <- max(x)
yLabels <- rownames(x)
xLabels <- colnames(x)
title <-c()
# check for additional function arguments
if( length(list(...)) ){
Lst <- list(...)
if( !is.null(Lst$zlim) ){
min <- Lst$zlim[1]
max <- Lst$zlim[2]
}
if( !is.null(Lst$yLabels) ){
yLabels <- c(Lst$yLabels)
}
if( !is.null(Lst$xLabels) ){
xLabels <- c(Lst$xLabels)
}
if( !is.null(Lst$title) ){
title <- Lst$title
}
}
# check for null values
if( is.null(xLabels) ){
xLabels <- c(1:ncol(x))
}
if( is.null(yLabels) ){
yLabels <- c(1:nrow(x))
}
layout(matrix(data=c(1,2), nrow=1, ncol=2), widths=c(4,1), heights=c(1,1))
ColorLevels <- 0:6
# Reverse Y axis
reverse <- nrow(x) : 1
yLabels <- yLabels[reverse]
x <- x[reverse,]
mycol<-grey(seq(1, 0, length=7))
image(1:length(xLabels), 1:length(yLabels), t(x), col=mycol, xlab="", ylab="Subjects", axes=FALSE,main="CNVs")
if( !is.null(title) ){
title(main=title)
}
axis(BELOW<-1, at=1:length(xLabels), labels=FALSE, cex.axis=0.7)
axis(LEFT <-2, at=1:length(yLabels), labels=FALSE, las= HORIZONTAL<-1, cex.axis=0.7)
layout(1)
legend("topright", c("loss","normal", "gain"), col=mycol[c(1,3,7)], pch=15)
}
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