On Tue, 2011-08-09 at 22:57 +1000, Andrew Halford wrote:
> Hi Listers,
>
> I am trying to reflect a PCA biplot in the x-axis (i.e. PC1) but am not
> having much success. In theory I believe all I need to do is multiply the
> site and species scores for the PC1 by -1, which would effectively flip t
Something like
opar<- par(mfcol = c(1, 2))
z<- prcomp(USArrests, scale = TRUE)
biplot(z, cex = 0.5)
z$x[,1]<- -z$x[,1]
z$rotation[,1]<- -z$rotation[,1]
biplot(z, cex = 0.5, xlab = "-PC1")
par(opar)
perhaps?
Allan
On 09/08/11 13:57, Andrew Halford wrote:
Hi Listers,
I am trying to reflect a
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