ron-r
1/22/2014 - 11:30 AM

R Creating a correlation heatmap for multi columns

R Creating a correlation heatmap for multi columns

CorrelationHeatmap
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set.seed(1)
x <- matrix(rnorm(20), nrow=5, ncol=4)
y <- matrix(rnorm(15), nrow=5, ncol=3)
COR <- cor(x,y)
COR
image(x=seq(dim(x)[2]), y=seq(dim(y)[2]), z=COR, xlab="x column", ylab="y column")
text(expand.grid(x=seq(dim(x)[2]), y=seq(dim(y)[2])), labels=round(c(COR),2))

from:http://stackoverflow.com/questions/10680658/correlation-matrix-in-r