isinf

Arguments

x

matrix of real or complex numbers

r

matrix of booleans of the same size as x

Description

isinf(x) returns the matrix r of booleans such that, for each element x(i), r(i) is set to %T if and only if x(i) is infinite.

When x is complex-encoded, x(i) is considered infinite if its real part or its imaginary part (or both) are infinite.

Examples

[i, inf, nan] = (%i, %inf, %nan);
isinf([-1  0.01 -inf  inf  nan])
isinf([2+i, -10-inf, inf+i])
isinf([nan-i, inf-nan*i, nan+i*inf])

See also

• isnan — check for "Not a Number" entries
• isreal — check if a variable is stored as a complex matrix
• isnum — tests if a string represents a number
• type — returns the type of a variable