Hello,

Em 05-09-2012 07:26, David Winsemius escreveu:
On Sep 4, 2012, at 4:39 PM, s.s.m. fauzi wrote:

Hi,
I have two table matrix, and I would like to compare the different between
two matrix.
For example:

Matrix 1:
    A B C
A 0  1 0
B 0  0 1
C 0  0  0

Matrix 2:
   A B C
A 0  1  0
B 0  0  0
C 0  0  0

Each column which have value 1, should also return value 1. As in this
case/example, the result should appear like this (as below). The result of
this differentiation should also be in matrix table and should be write in .
csv file.

Result of the differences:
Differences? What differences?

In fact, this doesn't seem to be a differences problem, but a logical one:
- result is 1 iff both operands are 1.
So the solution could be

# multiply to return an integer, not T/F
1*(matrix1 & matrix2)

Rui Barradas


If you examined the matrix returned by:

matrix1 == matrix2 it would look exactly like your desired result:


   A B C
A 0  1  0
B 0  0  0
C 0  0  0

At the mean time, I'm able to load the .csv file and convert it to matrix
matrix1 <-read.table("matrix1.csv", header=T, sep=",")
matrix1 <- as.matrix(matrix1)
matrix2 <- read.table("matrix2.csv", header=T, sep=",")
matrix2 <- as.matrix(matrix2)

But, I can't find a suitable script to compare the differences between the
matrix and write it to file.

Appreciate any help from the expert

        [[alternative HTML version deleted]]

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David Winsemius, MD
Alameda, CA, USA

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and provide commented, minimal, self-contained, reproducible code.

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