Question

How to check if object is a matrix in R

Answer 1

vec <- c(5, 9, 0, 1, 8, 4)

m <- matrix(vec, nrow = 3, byrow = TRUE) # TRUE = matrix is filled by rows

if (is.matrix(m)) {
  print("Is matrix")
} else {
  print("Is not matrix")
}
 

 
 
# run:
#
# [1] "Is matrix"
# 

 

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