I am trying to write a function that will graph a variable of a dataset or
a variable from a subset of the data. My function is as follows:
graphics<-function(dat, var, graph, varname, val, subset){
if(subset==1) {
data<-mySubset(dat=dat,varname=varname,val=val)
}else if(subset!=1){
data<-(dat)
}
if(graph==1) {
with(data, boxplot(var), main = paste("Vertical box plot of",
myfunc(dat), "variable", myfunc(var), xlab = myfunc(var)))
}else if(graph==2){
with(data, boxplot(var), horizontal=TRUE, main = paste("Horizontal
box plot of", myfunc(dat), "variable", myfunc(var), xlab =
myfunc(var)))
}else if(graph==3){
hist(var, main="Histogram of", myfunc(var))
}}
I included "subset" as a parameter for the function, so that subset=1 would
tell the function to subset, and any other value will use the full dataset.
However, when I run the function with the following expression (bolts is
the dataset, SPEED1 is the variable, value=3)
graphics(bolts, bolts$SPEED1, graph=3, bolts$SPEED1, 3, 1)
I receive this error message: Error in eval(substitute(expr), data, enclos
= parent.frame()) : invalid 'envir' argument of type 'logical'
Does anyone know why this is, or if there is something wrong with my code?
Thanks!
--
*Alexandra Hua *
Yale University | MPH Candidate Class of 2016
Chronic Disease Epidemiology
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