在矩阵中将NA的矩阵转换为0并将连续变量转换为1

Question

I have a matrix populated with NAs and continuous values. I need to convert NAs to 0s and continuous values to 1s. How can I do this in R?

Answer 1

Assuming m is as in the Note at the end:

1 - is.na(m)
##      [,1] [,2]
## [1,]    0    1
## [2,]    1    0

Note

m <- matrix(c(NA, 2, 3, NA), 2)
m
##      [,1] [,2]
## [1,]   NA    3
## [2,]    2   NA

Answer 2

Use the ifelse function:

your_matrix <- matrix(c(NA,NA,NA,3.5,2.5,5.0), nrow=2)
your_matrix <- ifelse(is.na(your_matrix), 0, 1)

Answer 3

If you have some values in a vector (d) and you have a matrix (m), then converting the numeric values to 1's and the NA values to 0's can be done with two lines of code.

d <- c(NA, NA, 2, 5, NA, 6, NA, 1,  6)
m <- matrix(data = d, nrow = 3, ncol = 3 )


m[is.na(d)] <- 0
m[d > 0 ] <- 1
m


#A matrix:
3 × 3 of 
type dbl
0 1 0
0 0 1
1 1 1