Question

Matlab中遇到了关于ezplot的问题，总是报错，急求解决！！！

>> ezplot(abs(X),[-9*pi,9*pi]);
??? Error using ==> inlineeval at 15
Error in inline expression ==> exp(Im(t.*w)).*abs(1./t.*(heaviside(t)-heaviside(t-1)))
??? Error using ==> eval
Undefined function or method 'Im' for input arguments of type 'double'.

Error in ==> inline.feval at 36
INLINE_OUT_ = inlineeval(INLINE_INPUTS_, INLINE_OBJ_.inputExpr, INLINE_OBJ_.expr);

Error in ==> ezplotfeval at 56
z = feval(f,x(1),y(1));

Error in ==> ezplot>ezimplicit at 253
u = ezplotfeval(f,X,Y);

Error in ==> ezplot at 153
hp = ezimplicit(cax,f{1},vars,labels,args{:});

Error in ==> sym.ezplot at 60
h = ezplot(f.s,varargin{:});

Answer 1

函数应该为字符串，得加单引号： ezplot('abs(X)',[-9*pi,9*pi]);