Why does ggplot stat_function print out only one value with dpois but not with dnorm?

Asked Jun 12 '16 at 11:03

Active Jun 12 '16 at 12:08

Viewed 183 times

ggplot()+aes(X)+geom_density()+ 
  stat_function(fun = dpois, colour = "red", args = list(lambda=parms$estimate))+
  xlab( "confirmation time [s]") + ggtitle("Shape of curve");

leads to:

but if args = list(mean = mean(X),sd = sd(X))) we get a nice normal distribution:

How can you explain this strange behavior?

edited Jun 12 '16 at 12:08

Mike Wise

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asked Jun 12 '16 at 11:03

Roland Kofler

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Have a look at http://stackoverflow.com/questions/28073783/ggplot-poisson-density-curve-why-zigzag-lines. Also, add a reproducible example to your question. – Divi Jun 12 '16 at 18:14

Why does ggplot stat_function print out only one value with dpois but not with dnorm?

0 Answers0