On May 7, 2011, at 4:16 AM, Dan Abner wrote:
Hello everyone,
What is the best way to have R print a title and then skip a line
(both
without the [1] line preffix) when writing a function that prints an
object
(to the console)? Simplified example:
fn3<-function(x,y){
c1<-cov(x,y)
print(c1)}
?cat
fn3<-function(x,y){
cat("Please examine this beautiful title\n")
c1<-cov(x,y)
cat(" ... here is your covariance ... \n", c1)}
data1<-data.frame(age=rnorm(50),weight=rnorm(50))
#### attach(data1)
# Do not use attach, especially with objects named 'data1' and
columns named 'weight'
# Here is what I saw on my system
#> attach(data1)
#The following object(s) are masked _by_ '.GlobalEnv':
#
# weight
# there was already a weight object in the workspace and the
# interpreter did not know which one to use
# and it was telling me it had 'decided' to use the other one
# So .... instead use with() as below:
> with(data1, fn3(age,weight) )
# output ...
Please examine this beautiful title
... here is your covariance ...
0.03096163
fn3(age,weight)
=====
How do I have R print a nicely formatted title when printing c1 to the
console?
(And Dan, if you are a member of this list, then be advised that
putting 'XXXX' in your subject line is going to get you email held by
the spambot that 'thinks' you are advertising something more
interesting than statistics.)
David Winsemius, MD
West Hartford, CT
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