implementation of t.test

On Mon, 11 Dec 2006, Weiwei Shi wrote:

Hi, there:

for some reason, I need to look at t.test at coding level. Can anyone
here suggest a place to start with?

You mean how to read the code??

Like this:

t.test # print the function

function (x, ...)
UseMethod("t.test")
<environment: namespace:stats>

# that told me 't.test' has S3 methods
methods(t.test)

[1] t.test.default* t.test.formula*

    Non-visible functions are asterisked

# that told me what they were
# and that I need ':::' to see them
page(stats:::t.test.default,"print")
page(stats:::t.test.formula,"print")
# looks like you want to study t.test.default

see
        ?methods
        ?":::"

HTH

[...]

Charles C. Berry                        (858) 534-2098
                                          Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu            UC San Diego
http://biostat.ucsd.edu/~cberry/         La Jolla, San Diego 92093-0717