where does the null come from?

out <-   apply(m, 1, cat, '\n')

1 3
2 4

out

NULL

Or, more explicitly, from ?cat :

  Value:
       None (invisible 'NULL').

Ted.

On Wed, May 13, 2009 at 5:23 AM, Wacek Kusnierczyk
<Waclaw.Marcin.Kusnierczyk at idi.ntnu.no> wrote:

_ _m = matrix(1:4, 2)

_ _apply(m, 1, cat, '\n')
_ _# 1 2
_ _# 3 4
_ _# NULL

why the null?

vQ

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______________________________________________
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Date: 13-May-09                                       Time: 15:56:04
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