[R] 1-pnorm values in a table

[Ben Bolker]

 <Richard.Cotton <at> hsl.gov.uk> writes:


[snip]

> Try:
> nrows <- 5
>  mm <- matrix(rnorm(30),nrow=nrows)
> sd.by.col <- apply(mm,2,sd)
> mean.by.col <- apply(mm,2,mean)
> values <- 1-mapply(pnorm, q=as.vector(mm), mean=rep(mean.by.col, nrows)), 
> sd=rep(sd.by.col, nrows)))
> values <- matrix(values, nrow=5)
> 
> >   p.s. I know I'm asking a lot, but ideally, I'd like to print out 
> > the table with those 1-pnorm values only if they are in the right 
> > hand tail (i.e. >= mean) and if not nothing or NA be written.
> 
> values[values<.5] <- NA
> 


I'm not sure, but I think that

nrows <- 5
mm <- matrix(rnorm(30),nrow=nrows)
pnorm(scale(mm),lower.tail=FALSE)
values[values<.5] <- NA

   will do the same thing.
lower.tail=FALSE is a little more accurate than 1-pnorm(...)

   cheers
    Ben Bolker