On 21/11/12 22:26, Rehena Sultana wrote:
Dear R - Experts,
I am trying to integrate lognormal distribution (mu = -0.3 and sigma2 =
0.00041.. ) based on the some hypothetical data. But I am getting 0 as the
result. I have checked that my R-code is correct as code is giving me result
for some other data.
As I understand, when I am integrating some pdf with in the range of (0, Inf),
I should not get 0. How to handle this kind of problem?
Please help. Looking forward for your reply.
Reproducible example?
When I do
integrate(function(x){dlnorm(x,meanlog=-0.3,sdlog=sqrt(0.00041))},0,Inf)
I get
1 with absolute error < 3.5e-06
No problema.
Why do you want to integrate it anyhow? You know the answer is 1.
Or if you want the integral from 0 to x for some x < infinity, just use
plnorm(). (???)
cheers,
Rolf Turner
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