Re: [R] Uniroot error message with in intergration

Many thanks Ellison I have modified it as you suggested but I have this error message <<>> I am not sure which arguments I have missed? *y <- function(t,n){ diff <- 0.5 df1 <- 2*n-2 ncp1 <- sqrt((diff^2*n)/2) p <- 1- pt(t,df=df1) test <- qt((1-p),df=df1,ncp=ncp1)*(1/sqrt(2)) return(test) }

Re: [R] Uniroot error message with in intergration

> Error in uniroot(integ, lower = 0, upper = 1000, n) : > 'interval' must be a vector of length 2 >>> > Please would you be able to give me an indication on why I am having this > error message. Because uniroot has a second parameter called 'interval' which overrides lower and upper and you

Re: [R] Uniroot error message with in intergration

I have defined t at the beginning of my query. I have added n on uniroot below and still getting the same error message uniroot(integ,lower=0,upper=1000,n) -- View this message in context: http://r.789695.n4.nabble.com/Uniroot-error-message-with-in-intergration-tp4634247p4634264.html Sent

Re: [R] Uniroot error message with in intergration

On Fri, Jun 22, 2012 at 4:00 PM, jeka12386 wrote: > Dear all > > I am trying to calculate the value of n using uniroot.  Here is the message > I am having: > > <<< > Error in uniroot(integ, lower = 0, upper = 1000, n) : >  'interval' must be a vector of length 2 >>> > > Please  would you be able t

[R] Uniroot error message with in intergration

Dear all I am trying to calculate the value of n using uniroot. Here is the message I am having: <<< Error in uniroot(integ, lower = 0, upper = 1000, n) : 'interval' must be a vector of length 2 >>> Please would you be able to give me an indication on why I am having this error message.