Re: [chemclipse-dev] Overflowing problem of Calculations.getSum(int[] va

[Philip Wenig <philip.wenig@xxxxxxxxxxxxx>]

We should also discuss to replace the methods of the numeric library by using Apache Math:
http://commons.apache.org/proper/commons-math


Best,
Philip

Am 30.09.2016 um 10:52 schrieb Alexander Kerner:

.. For desciptive statistics and regression calculations and... ok, for all kinds of statistics I would also recommend Apache commons math:

http://commons.apache.org/proper/commons-math/userguide/stat.html

Best,

Alex

~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Alexander Kerner » Software developer » alexander.kerner@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~

On 09/30/2016 10:50 AM, Alexander Kerner wrote:

Hi all,

definitely agree. Summing up intensity values can easily overflow int.

MSqBAT even uses BigInteger for such cases, since number overflows are impossible with this type.

Best

Alex

~~~~~~~~~~~~~~~~~~~~~~~~
OpenChrom - the open source alternative for chromatography / mass spectrometry
Dr. Alexander Kerner » Software developer » alexander.kerner@xxxxxxxxxxxxx » http://www.openchrom.net
~~~~~~~~~~~~~~~~~~~~~~~~

On 09/30/2016 09:20 AM, Trig Chen wrote:

In org.eclipse.chemclipse.numeric.statistics.Calculations, the getSum(int[] values) method returns a integer. 

public static int getSum(int[] values)

In some cases, such as a 10000 points scan with 10000 times accumulation. the summation of this scan's total signal might overflow.

How about does this method return a double value? The callers can cast it to float or int as they need.

Best regards,

Trig

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OpenChrom - the open source alternative for chromatography / mass spectrometry
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