gusucode.com > symbolic工具箱matlab源码程序 > symbolic/@sym/isVariable.m
function B = isVariable(x) % isVariable(x) % % Static hidden sym method to check if the argument is a symbolic variable % Copyright 2015 The MathWorks, Inc. B = isa(x, 'sym') && ~isa(x, 'symfun') && feval(symengine, 'testtype', x, 'Type::Indeterminate'); end