Input Argument type double

Hi,

I am running the "clusterDBSCAN" algorithm from the Phased Array Toolbox.

I try to get this example to run.

[___] = clusterer(X,update)

here the link to the help page: https://de.mathworks.com/help/phased/ref/clusterdbscan-system-object.html

My code is:

clusterer = clusterDBSCAN('EpsilonSource','Auto','MaxNumPoints',15, ...
    'MinNumPoints', 5);

update= 1;

idx = clusterer(X,update);

X is a 100 x 2 matrix in type double.

But the output error is:

"Error using phased.internal.AbstractClusterDBSCAN/validateInputsImpl (line 274)

Expected input UPDATE data type to be double."

Thank you for your help.

Answer 1

[Adam Danz]

The update variable in your code is equal to 1 and is entered as the 2nd input to the clusterer but it doesn't fulfill the requirements for the 2nd input.

[___] = clusterer(X,amblims)

The 2nd input specifies ambiguity limits which should either be a real-valued 1-by-2 vector or real-valued 2-by-2 matrix. For more info, see the link.

[___] = clusterer(X,update)

The 2nd input specifies the automatic update of epsilon where update is a logical value (true|false). In your case, update is 1, not true. To enable this syntax, set the EpsilonSource property to 'Auto', optionally set the MaxNumPoints property, and also optionally set the EpsilonHistoryLength property.

[Christian Metz]

I understood it like that when EnableDisambiguation property is set to false. Then the the second input is update.

Further, I do not want to use abiguities, that means I want to ignore that input or make it not influence the result.

[Adam Danz]

Thanks, I now see which syntax you are using. I updated my answer. Change the 1 to true.

idx = clusterer(X,true)

[Christian Metz]

Thanks that works. Weird I tried this before and it did not.

Thank you.

[Adam Danz]

Glad I could help.