Input Argument type double

Question

Christian Metz 2020-3-31

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/514382-input-argument-type-double

编辑： Adam Danz 2020-3-31

采纳的回答： Adam Danz

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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.

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Answer 1

Adam Danz 2020-3-31

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/514382-input-argument-type-double#answer_423160

编辑：Adam Danz 2020-3-31

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.