[R] Help on apply() function

Mark Lyman mark.lyman at gmail.com
Wed Aug 30 06:42:08 CEST 2006

Anusha <anu1978 <at> hotmail.com> writes:

> Respected Sir/Madam,
> I have a problem with apply function. I have to two matrices of dimension of
> one column but n rows. I have to check whether one matrix is greater than
> other by going thru each row (ie) using if condition to check one matrix
> with another matrix. 
> I like to use apply() function to this approach. That is apply function
> between two matrices. I searched for examples online but I couldn't find
> any.
> I don't know how to loop thru the matrices.
> Please help with this problem.
> Any help is appreciated.
> My mailid is monkponu <at> yahoo.com.
> Thanks,
> Anusha.

You can use the functions all.equal with the function isTRUE (see ?all.equal) to
check if two objects are nearly equal (within a certain tolerance). Or you can
use identical (see ?identical) to check if they are exactly the same. See the
examples in the help for identical.

Mark Lyman

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