delete

This example shows how to delete an annotation in the vdp model programmatically.

Open the example. Then, open the vdp model.

open_system('vdp')

To get the handles for the annotations in the model, use the find_system function.

h = find_system(gcs,'FindAll','on','Type','annotation');

To identify the annotations, query the text inside the annotations.

get_param(h,'PlainText')

ans = 3x1 cell
    {'Copyright 2004-2022 The MathWorks, Inc.'}
    {'Van der Pol Equation'                   }
    {'x'' - µ(1-x^2) x' + x = 0'              }

To delete the title of the model, 'Van der Pol Equation', get the Simulink.Annotation object that corresponds to the second handle.

an = get_param(h(2),'Object');

Delete the annotation from the model.

delete(an)

Get the handles for the annotations in the model. Then, query the text inside the annotations.

h1 = find_system(gcs,'FindAll','on','Type','annotation');
get_param(h1,'PlainText')

ans = 2x1 cell
    {'Copyright 2004-2022 The MathWorks, Inc.'}
    {'x'' - µ(1-x^2) x' + x = 0'              }

The model no longer has an annotation with 'Van der Pol Equation' as text.