size-methods | R Documentation |
Determine if an expression is a scalar, vector, or matrix.
is_scalar(object) is_vector(object) is_matrix(object)
object |
An Expression object. |
A logical value.
x <- Variable() y <- Variable(3) z <- Variable(3,2) is_scalar(x) is_scalar(y) is_scalar(x + y) is_vector(x) is_vector(y) is_vector(2*z) is_matrix(x) is_matrix(y) is_matrix(z) is_matrix(z - x)
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