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R function: is.vector

is.vector(obj) returns true of if the tested object (obj) is a vector or expression that has either no attributes or only the names attribute set.

In order to check if an object is an atomic vector, is.atomic() should be used. To test if the object is a list, is.list() should be used

vec <- c('one', 'two', 'three');
is.vector(vec);
#
#  TRUE

names(vec) <- c('A', 'B', 'C');
is.vector(vec);
#
#  TRUE

attr(vec, 'foo') <- 'bar';
is.vector(vec);
#
#  FALSE

lst <- list('e_1', 'e_2', 'e_3');
is.vector(lst);
#
#  TRUE

exp <- expression( 4 + 2:5 );
is.vector(exp);
#
#  TRUE

Github repository about-r, path: /functions/is.vector.R

R function: is.vector

See also