Question

_______________ returns TRUE then X can be termed as a matrix data object. (a) is.”matrix(X”) (b) is.matrix(X) (c) is.notamatrix(X ) (d) is.matrix(“X”) I have been asked this question in unit test. I'd like to ask this question from Functions in section Control Structures, Functions, Scoping Rules, Loop Functions and Debugging of R Programming Select the correct answer from above options

Answer 1

Right option is (b) is.matrix(X) For explanation: The function call is.matrix(X ) returns TRUE then X can be termed as a matrix data object. R has a large number of in-built functions and also the user can create their own functions.