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is it built in function or a structure ?

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This is from the matalb documentation of reconfigurable intelligent surfaces. helperRISSurface is function or a structure ? how can i pass parameters?
i tried to rum this and i am getting error here. i have uploaded the screenshots
kindly help me
thank you.
ris = helperRISSurface('Size',[Nr Nc],'ElementSpacing',[dr dc],...
ris =
helperRISSurface with properties:
ReflectorElement: [1x1 phased.IsotropicAntennaElement]
Size: [10 20]
ElementSpacing: [0.0054 0.0054]
OperatingFrequency: 2.8000e+10

Accepted Answer

Cris LaPierre
Cris LaPierre on 12 Feb 2024
It is a helper function that is included with this example. On the upper right corner of the example page, use the 'Open in MATLAB Online' or copy and run the 'Copy Command' in your MATLAB Command window to download the example and supporting files to your MATLAB Instance.
Cris LaPierre
Cris LaPierre on 4 Jun 2024 at 15:53
Please clarify what 'this ris' is.
Walter Roberson
Walter Roberson on 5 Jun 2024 at 0:40
I suspect that "this ris" refers to the variable "ris" returned from helperRISSurface()

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