Convert an object containing binary (integer
) fields (columns) into a
integer
vector
indicating the column index where each row is
1
.
category_vector(x) # S3 method for data.frame category_vector(x) # S3 method for sf category_vector(x) # S3 method for Spatial category_vector(x) # S3 method for matrix category_vector(x)
x |
|
---|
integer
vector
This function is conceptually similar to base::max.col()
except that rows with no values equal to 1
values are assigned a
value of zero. Also, note that in the argument to x
, each row must
contain only a single value equal to 1
.
# create matrix with logical fields x <- matrix(c(1, 0, 0, NA, 0, 1, 0, NA, 0, 0, 0, NA), ncol = 3) # print matrix print(x)#> [,1] [,2] [,3] #> [1,] 1 0 0 #> [2,] 0 1 0 #> [3,] 0 0 0 #> [4,] NA NA NA#> [1] 1 2 0 NA