[General] compare matrix to vector higher/lower
1
0
Entering edit mode
BenAbflack • 0
@benabflack-8435
Last seen 8.8 years ago
Zurich/Switzerland

Hey everyone,

I have a bit more of a general R question which I cant really figure out. I have a matrix of the type

   [A] [B] [C]
[1] 3   5   2
[2] 1   3   6
[3] 1   6   2

and a vector in the form

   [A] [B] [C]
[1] 2   4   7

What I am trying to get out is in this case 3 new columns attached to the initial matrix which would lets say go through all rows in column A and compare it to the value for [A] in the vector. If its higher than I would like to have a 1 in the new column, if lower a 0. And then for B and so on. In this example:

   [A] [B] [C] [A.2][B.2][C.2]
[1] 3   5   2    1    1    0 
[2] 1   3   6    0    0    0 
[3] 1   6   2    0    1    0

 

Anyone knows a good way to do this? I think I am getting too confused with multiple loops.

Thank you so much,

Ben

 

matrix • 919 views
ADD COMMENT
0
Entering edit mode
@andrewjskelton73-7074
Last seen 4 months ago
United Kingdom

This isn't the place to ask that question, you should probably try stack overflow for this sort of thing. However, it's early and I fancied a go...

foo           <- matrix(sample(1:20, 9),3,3)
baa           <- c(8,5,12)
out           <- baa < t(foo)
out[out == F] <- 0
out[out == T] <- 1
ADD COMMENT

Login before adding your answer.

Traffic: 546 users visited in the last hour
Help About
FAQ
Access RSS
API
Stats

Use of this site constitutes acceptance of our User Agreement and Privacy Policy.

Powered by the version 2.3.6