Have you reviewed Bora Beran's post regarding Logistic Regression with R and Tableau -Logistic Regression in Tableau using R « Bora Beran
There are a number of R posts in the forums and only a few members of our community have strong R skills.. maybe you will become one of them?? :0 Reviewing posts from Bora and Jonathan Drummey related to R make for a great starting place.
Did you try doing something like this?
paste0("admitstatus = ", round(coefficients(fit),2), "",
paste(sprintf(" %+.2f*%s ",