CODEWITHSUNDEEP
r
osimer pothe
osimer pothe

Reputation: 2897

how to read a matrix from text file in R

I have a text file name "A.txt" . In there , I have the following data: 

1 3 4 
2 3 4 
5 6 7

I want to read it and save as A vector in R software . How can I do that ?

Update :

I have tried by the following code : 

R> dat <- as.numeric(readLines('D:/Simplex/SimplexInitialTheoryWithRsoftware/src/A.txt'))
R>  dat.matrix <- matrix(dat, nrow=??)

But I have the following error .

Eror: unexpected ')' in "dat.matrix <- matrix(dat, nrow=??)"

I am very new in this software . Please help me

Upvotes: 2

Views: 40523

Answers (3)

MAZ
MAZ

Reputation: 161

The post is a bit old, but the answers are valid until today.

aa <- as.matrix(read.table("A.txt", sep=" "))

Upvotes: 3

Momin
Momin

Reputation: 868

Do it like this Define matrix with column header:

Col1 Col2 Col3 
1 3 4 
2 3 4 
5 6 7 
d<-read.table("/home/shad/Desktop/A.txt",header=TRUE,sep=" ")

then access it like:

d[1,1]
d[1,2]

For numeric conversion see documentation Hope it helps

Upvotes: 3

John
John

Reputation: 23758

From the way you've started out it looks like you're searching for the scan function.

mat <- scan('A.txt')
mat <- matrix(mat, ncol = 3, byrow = TRUE)

Upvotes: 12

Related Questions