[R] Weibull Distribution

2012-02-09 Thread Yogendra
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

Re: [R] Weibull Distribution

2012-02-09 Thread 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

Re: [R] Weibull distribution

2008-10-01 Thread Terry Therneau
I would like to calculate and plot a Weibull distribution (Weibull best-fit line, accuracy curves left and right beside the best-fit line) for a simple set of data points. I need the shape and the scale parameter for the best-fit and values like B5, B10, B50, B90, B95. You can use the survreg

Re: [R] Weibull distribution

2008-09-30 Thread Hoeks, Luis
Hello r-project team, I am new (test) user of R and I need some help. Sorry to wrote in German before, I am just a newbee to this mailing list. I would like to calculate and plot a Weibull distribution (Weibull best-fit line, accuracy curves left and right beside the best-fit line) for a

Re: [R] Weibull distribution

2008-09-30 Thread David Winsemius
Doing a search on: weibull and probability plot along with... r-help in Google produced this reply which I think gives a worked example that fits some of your hopes. http://tolstoy.newcastle.edu.au/R/help/03b/1714.html I am not sure what the BN's are however. If they are quantiles. I