Search found 2 matches

by sumankundu
Fri Oct 26, 2012 10:39 am
Forum: GenABEL
Topic: Is it possible to obtain Youden's Index from PredictABEL?
Replies: 1
Views: 1068

Re: Is it possible to obtain Youden's Index from PredictABEL

Hi, If definition of Youden index is (Sensitivity + Specificity − 1), then you only need to calculate sensitivity and specificity at every cut-off values along ROC plots. These can be obtained from the function ‘performance’ in ROCR package. The same function was used in PredictABEL package to calcu...
by sumankundu
Mon May 23, 2011 1:47 pm
Forum: Journal Club on Statistical Genomics
Topic: [Solved] Methodology for prediction equations of phenotypic
Replies: 3
Views: 4870

Re: Methodology for prediction equations of phenotypic data

Dear Nicolas, I am currently associated with comparing different simulation methods which have been used in (geneic) risk prediction studies and working with Cecile Janssens group in Erasmus MC, Rotterdam. Following links may be usefull in your project. 1. PredictABEL: an R package for the assessmen...

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