[R] Some more general questions
Thomas W Blackwell
tblackw at umich.edu
Wed Mar 19 21:23:27 CET 2003
For summary(), yes, you can alter the way things are displayed.
It's easiest to think of capturing the output from summary() in
a temporary variable, then displaying that variable's value, but
this could also all be done as inline code. For example,
temp <- summary(data[])
print(cbind(names(temp), format(as.numeric(temp))), quote=F)
Second question: calling hist() with a vector of character
strings doesn't work, and arguably, it shouldn't. There's no
intrinsic notion of "interval" for character strings, no sense
in which you want to discretize continuous data into a set of
contiguous, discrete "bins". Character strings are discrete
already. So use barplot(table(data[[ ? ]])). (Can't remember
which columns in your exampel would have string values.) Or
temp <- table(data) and print the result however you want.
- tom blackwell - u michigan medical school - ann arbor -
On Wed, 19 Mar 2003 laurent.duperval at microcell.ca wrote:
> Some general questions.
> - Can I control the output of a function? For example, if I do:
> > summary(data[])
> Min. 1st Qu. Median Mean 3rd Qu. Max.
> 0.0 0.0 120.0 193.3 310.0 10290.0
> can I control the output to be something like
> in order to parse with an external program?
> - Yet another question on histograms: can I produce them with character
> strings? I'm guessing I need to map each character value to a numerical
> one and use that instead.
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