search for: urweibull

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2010 Sep 19
1
Weibull- Random Censoring
I generate random vector from Weibull distribution sampWB <-urweibull(sampleSize, shape=shape.true, scale=scale.true, lb=0, ub=Inf) how can I create subvector containing 30% of samplesize of sampWB which should be assigned as Censored data? The probability for each value in sampWB can be uniform to be included in the subvector.
2010 Sep 16
1
Weibull simulation- number of items to replace is not a multiple of replacement length
...define metrix for the variables still I got this message: number of items to replace is not a multiple of replacement length Any suggestion > est=matrix (NA, 2,2) > se=matrix (NA, 2,2) > for ( p in 1:2) { + sampleSize <- 20 + shape.true <- 1.82 + scale.true <- 987 + sampWB <- urweibull(sampleSize, shape=shape.true, scale=scale.true, lb=0, ub=Inf) + sampWBmleWB <- weibullMLE(sampWB) + est[p]= sampWBmleWB$estimate + se [p]= sampWBmleWB$s + } Warning messages: 1: In est[p] = sampWBmleWB$estimate : number of items to replace is not a multiple of replacement length 2: In se[p] =...