isa not recognizing Line or Figure class

I wanted to test whether input data of a function is a Line object using something like:

>>

   x=-2*pi:.01:2*pi;HLine=plot(sin(2*x));

However, now isa(HLine,'Line') returns false! So far, isa has faithfully recognized my self-made classes. Why doesn't it recognize Line?

Answer 1

[Guillaume]

>> x=-2*pi:.01:2*pi;HLine=plot(sin(2*x));
>> class(HLine)
ans =
    'matlab.graphics.chart.primitive.Line'

>> isa(HLine, 'matlab.graphics.chart.primitive.Line')
ans =
  logical
   1

You need to use the fully qualified name of the class

[Mikael Agopov]

Thank you, that explains it.

Answer 2

[KSSV]

x=-2*pi:.01:2*pi;
HLine=plot(sin(2*x));

strcmp(HLine.Type,'line')

[Guillaume]

Note that the Type property of a graphics object is not relevant for isa.

[KSSV]

Yes....thats why I used strcmp to check is it a Line type.