How to make polardb finction work

I want to draw a beam, but I refer to the example in this article.

Code source

https://www.mathworks.com/matlabcentral/fileexchange/55924-array-signal-processing-demos?focused=c9810cf5-69cf-593b-a2ae-7f48c60ae3ba&tab=example

I want to draw the beam as shown below

figure('NumberTitle','off','Name','Figure 11.9 in Polar','Position',[0 0 600 850]);

subplot(2,1,1);
polardb(angle*pi/180,10*log10(abs(C1).^2),-60,'b');
title('Beampattern Using Definition');
grid on;

Will show the following error

Where is polardb defined?

How to correct it?

Thx.

[Jia-Hong Lai]

How can you even spell the word wrong in the title?

Answer 1

[Gnaneswar Nadh satapathi]

pls go through the link

https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/47750/versions/7/previews/Utilities/polardb.m/index.html

[ZY G]

thx