| stopifnot {base} | R Documentation |
If any of the expressions in ... are not all
TRUE, stop is called, producing an error message
indicating the first element of ... which was not
true.
stopifnot(...)
... |
any number of (logical) R expressions
which should evaluate to TRUE. |
stopifnot(A, B) is conceptually equivalent to
{ if(!all(A)) stop(...) ; if(!all(B)) stop(...) }.
(NULL if all statements in ... are TRUE.)
stopifnot(1 == 1, all.equal(pi, 3.14159265), 1 < 2) # all TRUE m <- matrix(c(1,3,3,1), 2,2) stopifnot(m == t(m), diag(m) == rep(1,2)) # all(.) |=> TRUE op <- options(error = expression(NULL)) # "disable stop(.)" << Use with CARE! >> stopifnot(all.equal(pi, 3.141593), 2 < 2, all(1:10 < 12), "a" < "b") stopifnot(all.equal(pi, 3.1415927), 2 < 2, all(1:10 < 12), "a" < "b") options(op)# revert to previous error handler