Count of elements in coulmns of a matrix

It depends: what's in those "empty" space?

Some combination of apply() and something else, depending on what your
matrix *actually* looks like, and here dput() would be vastly
preferable to copy and paste of something that didn't even come from
an R session.

The something else might involve length() or is.na() or, well, other
possibilities but my telepathy is on the fritz today.

Sarah

Could you please tell me what is the function or method to get count of
elements in all the columns in a matrix ?

for eg :-

ABC      XYZ    PQR
------      -----     ------
2            3            4
               4           5
5            4           3
              2

Result will be like
ABC      XYZ    PQR
------      -----     ------
2             4            3

Could you please help me ?

Sarah Goslee
http://www.functionaldiversity.org

Hi,

Try this:

list1<-list(ABC=c(2,5),XYZ=c(3,4,4,2),PQR=c(4,5,3))

lapply(list1,function(x) length(x))

$ABC
[1] 2

$XYZ
[1] 4

$PQR
[1] 3

?list2<-lapply(list1,function(x) length(x))
?dat2<-data.frame(list2)
?dat2
? ABC XYZ PQR
1?? 2?? 4?? 3
A.K.



----- Original Message -----
From: Rantony <antony.akkara at ge.com>
To: r-help at r-project.org
Cc: 
Sent: Tuesday, July 10, 2012 8:31 AM
Subject: [R] Count of elements in coulmns of a matrix

Could you please tell me what is the function or method to get count of
elements in all the columns in a matrix ?

for eg :-

ABC? ? ? XYZ? ? PQR
------? ? ? -----? ?  ------
2? ? ? ? ? ? 3? ? ? ? ? ? 4
? ? ? ? ? ? ?  4? ? ? ? ?  5
5? ? ? ? ? ? 4? ? ? ? ?  3
? ? ? ? ? ? ? 2

Result will be like
ABC? ? ? XYZ? ? PQR
------? ? ? -----? ?  ------
2? ? ? ? ? ?  4? ? ? ? ? ? 3

Could you please help me ?

--
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Sent from the R help mailing list archive at Nabble.com.

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