[R] help filtering points from a scatterplot
Dallas
tad.dallas at drakeresearchlab.com
Fri Feb 24 19:13:25 CET 2012
Okay. I think I understand now. You would just like nothing to be plotted for
the points below a certain threshold but there will still be that space
indexing where the point would've gone. I hope I have this right.
So what you could do to fix that is to make a new matrix (still including
all the data) and then make values above a certain threshold NA.
#Make up some data
> a=seq(1,100,by=1)
> b=runif(100,0,0.5)
#Make a matrix
> matrix=cbind(a,b)
#Make values above a threshold = NA
> newmatrix=matrix
> newmatrix[,2][which(newmatrix[,2]<0.1)]<-NA
#Plot values
> plot(newmatrix[,2]~newmatrix[,1], ylim=c(0,1), las=1, ylab='Explan',
> xlab='Window')
Okay. You just solved it. I'll still post this if you would like to use it.
Tad
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