[R] how to evaluate character vector within pnorm()

[Bill.Venables at csiro.au]

Here is one way:


x <- c(2,3)
names(x) <- c("mean", "sd")

do.call(pnorm, c(list(0), as.list(x)))

 


Bill Venables
http://www.cmis.csiro.au/bill.venables/ 


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Thomas Roth (geb. Kaliwe)
Sent: Friday, 17 July 2009 6:03 PM
To: 'r-help at r-project.org'
Subject: [R] how to evaluate character vector within pnorm()

Hi,

I'm trying to evaluate a character vector within pnorm. I have a vector 
with values and names

x = c(2,3)
names(x) = c("mean", "sd")

so that i tried the following

temp = paste(names(x), x, sep = "=")

#gives
#> temp
#[1] "mean=2" "sd=3"

#Problem is that both values 2 and 3 are taken as values for the mean 
argument in pnorm
pnorm(0, eval(parse(text = temp)) )

#but not as
pnorm(0, mean = 2, sd = 3 )


#How can i get

pnorm(0, eval(parse(text = temp)) )

#to do

pnorm(0, mean = 2, sd = 3 )



Thank you for your time

Thomas Roth

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