[R] Q-Q Plot for loglogistic, lognormal and 2 parameter exponential distributions

[peter dalgaard]

A basic approach is

x <- rchisq(1000, 4)
qqplot(qchisq(ppoints(x), 4), x) 
abline(0,1)

Substitute whatever distribution and parameters that might apply. Notice that if you don't have a location-scale family of distributions, you need to compare to the identity line, not just look for linearity.

-pd

On 12 Oct 2014, at 11:58 , Jomy Jose <infojomy at gmail.com> wrote:

> Is there any R package that can plot Q-Q plot for loglogistic,lognormal and
> 2 parameter exponential distributions or is there a way to check the model
> fit for these distributions in R ?
> 
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-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
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Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com