Matlab,Problemas con vectores y matrices,que puedo hacer ante este error...

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Warning: Function behaves unexpectedly on array inputs. To improve performance, properly vectorize your function to return an output
with the same size and shape as the input arguments.
> In matlab.graphics.function.FunctionLine>getFunction
In matlab.graphics.function.FunctionLine/updateFunction
In matlab.graphics.function.FunctionLine/set.Function_I
In matlab.graphics.function.FunctionLine/set.Function
In matlab.graphics.function.FunctionLine
In fplot>singleFplot (line 241)
In fplot>@(f)singleFplot(cax,{f},limits,extraOpts,args) (line 196)
In fplot>vectorizeFplot (line 196)
In fplot (line 166)
In dibujo2>pushbutton1_Callback (line 111)
In gui_mainfcn (line 95)
In dibujo2 (line 17)
In matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)dibujo2('pushbutton1_Callback',hObject,eventdata,guidata(hObject))