[R] Using apply for two datasets

[Gang Chen]

Thanks a lot for the quick help!

mapply() seems promising. However, mapply(t.test, myData1, myData2)
would not work, so how can I specify the margin in mapply() which
function t.test() will be applied over? For example, I specify the 2nd
dimension (column) in apply(myData1, 2, t.test) to run one-sample
t-test. Is there a way I can achieve the same with mapply()?

Thanks again,
Gang


On Tue, Jan 6, 2009 at 12:34 PM, Henrique Dallazuanna <wwwhsd at gmail.com> wrote:
> I think that you can use mapply for this.
>
> On Tue, Jan 6, 2009 at 3:24 PM, Gang Chen <gangchen6 at gmail.com> wrote:
>>
>> I can run one-sample t-test on an array, for example a matrix myData1,
>> with the following
>>
>> apply(myData1, 2, t.test)
>>
>> Is there a similar fashion using apply() or something else to run
>> 2-sample t-test with datasets from two groups, myData1 and myData2,
>> without looping?
>>
>> TIA,
>> Gang