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From Daniel Price <danprice...@gmail.com>
Subject Re: Apache Commons Math and Groovy -- Argument Type?
Date Sun, 03 Jan 2016 21:29:04 GMT
That did it, thanks!  Thought I tried primitives earlier, but apparently
not...
On Jan 3, 2016 4:01 PM, "Schalk Cronjé" <ysb33r@gmail.com> wrote:

> Change to double[] instead of Double[].
>
>
> On 03/01/2016 20:50, Daniel Price wrote:
>
> Sorry, code sample:
>
> import org.apache.commons.math3.stat.correlation.Covariance
> import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics
> import org.apache.commons.math3.util.*
>
> Double[] dblArray1 =
> [0.00995630918100443,0.00425329233495364,-0.01227651365617033,0.015574186166315451]
> as Double[]
> Double[] dblArray2 =
> [0.004630842339633734,0.003451971610807014,-0.008004809261582091,0.04068026756946197]
> as Double[]
> def cov = new Covariance().covariance(dblArray1, dblArray2)
> println "cov: $cov"
>
> Result:
> Exception in thread "main" groovy.lang.MissingMethodException: No
> signature of method:
> org.apache.commons.math3.stat.correlation.Covariance.covariance() is
> applicable for argument types: ([Ljava.lang.Double;, [Ljava.lang.Double;)
> values: [[0.00995630918100443, 0.00425329233495364,...
> Possible solutions: covariance([D, [D), covariance([D, [D, boolean)
>
> So, how would I create the proper array argument: [D,[D ?  Some Apache
> Commons Math type I need to cast my java.lang.Double to?
>
> Any suggestions much appreciated!
> D
>
> On Sun, Jan 3, 2016 at 10:43 AM, Eric MacAdie <emacadie@gmail.com> wrote:
>
>> Could you give a code sample?
>>
>> = Eric MacAdie
>>
>>
>> On Sun, Jan 3, 2016 at 11:37 AM, Daniel Price <danprice303@gmail.com>
>> wrote:
>>
>>> Got this 2.4.5 Groovy error trying to perform a covariance calc:
>>>
>>> groovy.lang.MissingMethodException: No signature of method:
>>> org.apache.commons.math3.stat.correlation.Covariance.covariance() is
>>> applicable for argument types: ([Ljava.lang.Double;, [Ljava.lang.Double;)
>>>
>>> covariance() requires two double arrays, and that's what I provided, so
>>> what gives?
>>>
>>> Do I need to cast the Groovy/Java array into another type?
>>>
>>> Any advice is much appreciated!
>>>
>>> D
>>>
>>>
>>>
>>
>
>
> --
> Schalk W. Cronjé
> Twitter / Ello / Toeter : @ysb33r
>
>

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