Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-07 Thread Gilles Sadowski
Hello. 2020-03-07 14:50 UTC+01:00, chentao...@qq.com : > Hi, > >>> > [...] >>> Solution 3 is "ClusterRanking". >>> In cases where the reference algorithm would assume the >>> other convention (i.e. "lower is better"), the implementation >>> is required to apply a conversion (e.g. return the oppo

Re: Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-07 Thread chentao...@qq.com
Hi, >> >  [...] >> Solution 3  is "ClusterRanking". >> In cases where the reference algorithm would assume the >> other convention (i.e. "lower is better"), the implementation >> is required to apply a conversion (e.g. return the opposite). > >s/opposite/inverse/ > >[We should probably enforce tha

Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-07 Thread chentao...@qq.com
Hi, >Hello. > [...] >> For machine learning centroid cluster algorithm, we often use is >> Calinsk-iHarabasz score to evaluate which algorithm or how many >> centers is >> best for a dataset. >> The python lib sklearn implements Calinsk-iHarabasz as >> sk

Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-07 Thread Gilles Sadowski
> > [...] > Solution 3 is "ClusterRanking". > In cases where the reference algorithm would assume the > other convention (i.e. "lower is better"), the implementation > is required to apply a conversion (e.g. return the opposite). s/opposite/inverse/ [We should probably enforce that ranking is p

Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-07 Thread Gilles Sadowski
Hello. >>> [...] >>> >> For machine learning centroid cluster algorithm, we often use is >>> >> Calinsk-iHarabasz score to evaluate which algorithm or how many >>> >> centers is >>> >> best for a dataset. >>> >> The python lib sklearn implements Calinsk-iHarabasz as >>> >> sklearn.metrics.

Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-06 Thread chentao...@qq.com
Hi, >Le ven. 6 mars 2020 à 14:35, chentao...@qq.com a écrit : >> >> Hi, >> >> >Hello. >> > >> >2020-03-06 9:48 UTC+01:00, chentao...@qq.com : >> >> Hi, >> >> For machine learning centroid cluster algorithm, we often use is >> >> Calinsk-iHarabasz score to evaluate which algorithm or how many

Re: Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-06 Thread Gilles Sadowski
Le ven. 6 mars 2020 à 14:35, chentao...@qq.com a écrit : > > Hi, > > >Hello. > > > >2020-03-06 9:48 UTC+01:00, chentao...@qq.com : > >> Hi, > >> For machine learning centroid cluster algorithm, we often use is > >> Calinsk-iHarabasz score to evaluate which algorithm or how many centers is > >>

Re: Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-06 Thread chentao...@qq.com
Hi, >Hello. > >2020-03-06 9:48 UTC+01:00, chentao...@qq.com : >> Hi, >> For machine learning centroid cluster algorithm, we often use is >> Calinsk-iHarabasz score to evaluate which algorithm or how many centers is >> best for a dataset. >> The python lib sklearn implements Calinsk-iHaraba

Re: [math]Discuss: There should be a CalinskiHarabaszClusterEvaluator in ml package

2020-03-06 Thread Gilles Sadowski
Hello. 2020-03-06 9:48 UTC+01:00, chentao...@qq.com : > Hi, > For machine learning centroid cluster algorithm, we often use is > Calinsk-iHarabasz score to evaluate which algorithm or how many centers is > best for a dataset. > The python lib sklearn implements Calinsk-iHarabasz as > sklea