On 21.02.2017 18:29, C W wrote:
Dear R list,
I am having a little trouble understanding the R code. I want to compute
expectation of normal pdf.
I did the following:
integrate(x*dnorm(x, rate=1), -Inf, Inf)
integrate needs a function as first argument, hence:
integrate(function(x) x*dnorm(x, rate=1), -Inf, Inf)
and then you have the next error that is more obvious to fix...
Error in match.fun(f) : object 'x' not found
If I did this, I get,
integrate(dexp(x, rate=1), -Inf, Inf)
Error in dexp(x, rate = 1) : object 'x' not found
same here.
How should I fix this? I remember when I did it for curve(), it was fine.
curve(pexp(x, rate = 1/2), from = 0, to = 5)
curve() is an exception in that it can use an unevaluated function call.
Best,
Uwe Ligges
What am I not getting here? Thank you so much!
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