abbreviate function using 'with'
On 13/02/2014, Rolf Turner <r.turner at auckland.ac.nz> wrote:
What you've written is simply not (anything like!) R syntax. You should learn to speak R if you are going to use R.
Agree; was reviewing the help text examples invoked by '?with'.
In this particular instance
testsum <- sum(testcsv[2,2:4])
should give what you want. The use of with() is uncalled for in this
context. The with() function allows you to refer to (e.g.) columns of
a data frame by name, as if these columns were objects in your workspace
("global environment"). That is *not* what you are doing, or need to do
here.
Forgive the example. The objective is to use the function 'with' to refer to specific indices of a dataframe. In retrospect, the example given was poor because actually, I want to understand the syntax to specify particular indices within a single dataframe, without having to state the dataframe repeatedly.
P. S.: Please read fortune("people who don't exist") and change your
modus operandi.
Never heard of fortune, but understand the latin: http://www.michaeleisen.org/blog/?p=1554