31 lines
425 B
R
31 lines
425 B
R
## a quick check on vcov for fitdistr (from 7.3-6/7)
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library(MASS)
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options(digits=4)
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set.seed(1)
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x <- rnorm(100)
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fit <- fitdistr(x, "normal")
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fit
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vcov(fit)
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x <- rlnorm(100)
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fit <- fitdistr(x, "lognormal")
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fit
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vcov(fit)
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x <- rpois(100, 4.5)
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fit <- fitdistr(x, "poisson")
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fit
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vcov(fit)
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x <- rexp(100, 13)
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fit <- fitdistr(x, "exponential")
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fit
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vcov(fit)
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x <- rgeom(100, 0.25)
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fit <- fitdistr(x, "geometric")
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fit
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vcov(fit)
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