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#
# plot.traits.R
#
# copyright (c) 2010-2012 - GBIC, Danny Arends, Bruno Tesson and Ritsert C. Jansen
# last modified Apr, 2013
# first written Apr, 2013
#
# Trait vs Trait scatter plot routine for CTL analysis
#
plotTraits <- function(genotypes, phenotypes, phenocol = c(1, 2), marker = 1, doRank = FALSE){
t1 <- phenotypes[, phenocol[1]]
t2 <- phenotypes[, phenocol[2]]
if(doRank){ t1 <- rank(t1); t2 <- rank(t2) }
geno <- genotypes[,marker]
betas <- stdSlopeEstimate(t1,t2, geno)
inter <- stdSlopeIntercept(t1,t2, geno, betas)
t1name <- colnames(phenotypes)[phenocol[1]]
t2name <- colnames(phenotypes)[phenocol[2]]
plot(t1, t2, type = "n", main = "Trait-Trait scatterplot", xlab=t1name, ylab=t2name)
max1 <- max(t1*1.25, na.rm=TRUE); max2 <- max(t2*1.25, na.rm=TRUE)
min1 <- min(t1, na.rm=TRUE); min2 <- min(t2, na.rm=TRUE)
abline( v = seq(min1, max1, (max1 - min1) / 40), lty = 3, col = colors()[ 440 ] )
abline( h = seq(min2, max2, (max2 - min2) / 40), lty = 3, col = colors()[ 440 ] )
points(t1, t2, pch=19, cex=0.5, col = geno)
cors <- NULL
for(x in 1:length(unique(geno))){
idx <- which(geno == unique(geno)[x])
cors <- c(cors, cor(t1[idx], t2[idx],use="pair"))
abline(inter[x], betas[x], col = x, lwd=1.5)
}
legend("topright", title="Correlation", col=unique(geno), legend = round(cors, digits = 2), lwd=1, cex=0.7)
legend("topleft", title="Slope", col=unique(geno), legend = round(betas, digits = 2), lwd=1, cex=0.7)
}
# end of plot.traits.R
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