why The name 'Parent' is not an accessible property for an instance of class 'matlab.gr​aphics.Gra​phicsPlace​holder'?

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I try to use hgtransform like this tutorial(Create transform object - MATLAB hgtransform (mathworks.com) but my matlab doesn't run properly. It's always tell me that The name 'Parent' is not an accessible property for an instance of class 'matlab.graphics.GraphicsPlaceholder'.

Accepted Answer

Walter Roberson
Walter Roberson on 30 Nov 2021
Put a breakpoint in at the begining of the sequence of statements where h() is assigned to, the series
h(1) = surface(x,y,z,'FaceColor','red');
h(2) = surface(x,y,-z,'FaceColor','green');
h(3) = surface(z,x,y,'FaceColor','blue');
h(4) = surface(-z,x,y,'FaceColor','cyan');
h(5) = surface(y,z,x,'FaceColor','magenta');
h(6) = surface(y,-z,x,'FaceColor','yellow');
Use the debugger to dbstep to execute one of the lines at a time. Examine the h vector afterwards. Do all of the entries in h show up as GraphicsPlaceholder ? Do some of the entries in h show up as GraphicsPlaceholder ? If so, after the h(6) assignment, which entries in h are GraphicsPlaceholder ?
What shows up for the command
which -all surface
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