Hi All,
If you could help me with this problem I would greatly appreciate it.
Suppose I have a matrix A:
1 1 1 1 0 1 1 1 1
1 1 1 0 1 0 1 0 0
1 0 1 0 0 1 0 0 0
1 1 0 0 0 0 1 0 0
I would like, for each row, to sum the number of times a 0 appears in
front of a 1. So what I would like is to have
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Guenther, Cameron
Sent: Tuesday, November 28, 2006 4:20 PM
To: r-help@stat.math.ethz.ch
Subject: [R] Counting zeros in a matrix
Hi All,
If you could help me with this problem I would greatly appreciate it.
Suppose I have a matrix A:
1 1
On Tue, 2006-11-28 at 16:20 -0500, Guenther, Cameron wrote:
Hi All,
If you could help me with this problem I would greatly appreciate it.
Suppose I have a matrix A:
1 1 1 1 0 1 1 1 1
1 1 1 0 1 0 1 0 0
1 0 1 0 0 1 0 0 0
1 1 0 0 0 0 1 0 0
I would like, for each row, to sum the number
A - matrix(c(
1,1,1,1,0,1,1,1,1,
1,1,1,0,1,0,1,0,0,
1,0,1,0,0,1,0,0,0,
1,1,0,0,0,0,1,0,0),
4, 9, byrow=TRUE)
apply(A, 1, function(x) sum(diff(x)==1))
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read
countZerosBeforeOnes - function(v)
sum(v[1:max(which(v == 1))] == 0)
apply(A, 1, countZerosBeforeOnes)
cheers,
b
On Nov 28, 2006, at 4:20 PM, Guenther, Cameron wrote:
Hi All,
If you could help me with this problem I would greatly appreciate it.
Suppose I have a matrix A:
1 1 1 1 0 1
] Counting zeros in a matrix
Hi All,
If you could help me with this problem I would greatly appreciate it.
Suppose I have a matrix A:
1 1 1 1 0 1 1 1 1
1 1 1 0 1 0 1 0 0
1 0 1 0 0 1 0 0 0
1 1 0 0 0 0 1 0 0
I would like, for each row, to sum the number of times a 0 appears in
front of a 1. So
