Error with family in geom_smooth

[Manuel Spínola]

Dear group members,

I am trying to use geom_smooth with a logistc regression and I got the following error:

library(ggplot2)

data(mtcars)

dat <- subset(mtcars, select=c(mpg, am, vs))

logr_vm <- glm(vs ~ mpg, data=dat, family=binomial(link="logit"))

ggplot(dat, aes(x=mpg, y=vs)) + geom_point() +

stat_smooth(method="glm", family="binomial", se=FALSE)

Error: Unknown parameters: family

Any idea what I am doing wrong?

Best,

Manuel

[Ben Bolker]

I'm guessing that you're using the development version of ggplot; try
using method.args=list(family="binomial") ?

[Manuel Spínola]

Thank you very much Ben.  That was the problem.

Manuel

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Manuel Spínola, Ph.D.
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspi...@una.ac.cr
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[u112...@tuks.co.za]

Hi, I still get an error when I use method.args. Perhaps I am using it wrong?

Here is my code:

g + geom_smooth(data = df, aes(x=a,y=s_bc), method = "glm", formula = s_bc~a, family = binomial(link="log"))

How would I use it with this line of script?

Thanks

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