gusucode.com > symbolic工具箱matlab源码程序 > symbolic/@sym/isnan.m
function y = isnan(x) %ISNAN True for Not-a-Number for symbolic arrays. % ISNAN(X) returns an array that contains 1's where % the elements of X are symbolic NaN's and 0's where they are not. % For example, ISNAN(sym([pi NaN Inf -Inf])) is [0 1 0 0]. % % For any X, exactly one of ISFINITE(X), ISINF(X), or ISNAN(X) % is 1 for each element. % % See also SYM/ISFINITE, SYM/ISINF. x = privResolveArgs(x); y = logical(feval(symengine, 'symobj::map', x{1}, 'stdlib::isnan')); end