Hi, I want to estimate parameter of weibull distribution using mle for below density function, The PDF is, f(x) = b a^-b x^(b-1) exp -(x/a)^b In R ,density of the weibull distribution is, f(x) = (a/b) (x/b)^(a-1) exp(- (x/b)^a) which is different from my density, I trying to estimate mle parmeter from R using fitdistr and fitdist functions. Can anyone tell me whatever parameter estimated from R are correct for my density function or not? Thanks Yogendra -- View this message in context: http://r.789695.n4.nabble.com/Weibull-Distribution-tp4373016p4373016.html Sent from the R help mailing list archive at Nabble.com.
Weibull Distribution
2 messages · Yogendra, Rui Barradas
Hello,
I want to estimate parameter of weibull distribution using mle for below density function, The PDF is, f(x) = b a^-b x^(b-1) exp -(x/a)^b In R ,density of the weibull distribution is, f(x) = (a/b) (x/b)^(a-1) exp(- (x/b)^a) which is different from my density,
Is this homework? It seems you need to learn (portuguese) 8th grade math: your 'a' in R is 'b' and your 'b' in R, 'a'. Mathematically, they are exactly the same... Rui Barradas -- View this message in context: http://r.789695.n4.nabble.com/Weibull-Distribution-tp4373016p4373198.html Sent from the R help mailing list archive at Nabble.com.