> -----Original Message-----
> [mailto:r-help-boun...@r-project.org] On Behalf Of francisco.ahued
> Subject: [R] Return invisible list
>
> x=read.table("data.txt",header=T)
> goa=(x[,3])
> meplot(goa)
>
> I can see the plot, but I would like to see the values of the
> x and y axis.
>
Something returned as invisible is returned but not printed.
You just need to catch it in a suitable variable. That's what you do with any
other function where you want to keep the value:
x=read.table("data.txt",header=T)
goa=(x[,3])
mplist <- meplot(goa) #assigns the output to a variable called mplist
mplist #calls the default print method for that object.
If you don't need to keep the values for re-use, putting something in
parentheses evaluates the expression and returns the result, effectively
removing the invisibility cloak without explicit assignment.
Example
z<-rnorm(100)
hist( z ) #returns invisible list
but
( hist( z ) ) #additionally displays the output.
S Ellison*******************************************************************
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