[otb-users] Re: Generate variable importance plot from random forests classifier

2017-11-14 Thread Bambang Trisasongko
Hi Preethi, I have managed to get it through R, using raster, caret and randomForest packages. Simply extract raw statistics and ingest them into R. After that, use OTB for actual RF classification and accuracy assessment. HTH, Bambang On Wednesday, November 8, 2017 at 11:10:20 PM UTC+11, pree

Re: [otb-users] classification speed-up parameter

2016-05-29 Thread Bambang Trisasongko
Hello.. To add Jordi's comment, modern data mining methods (SVM, RF, GBT, ...) have been designed to adapt small amount of sample sets. So, as Jordi has said, small polygons would be enough. It is however advisable to use remaining data (polygon) to validate the model (ComputeConfusionMatrix) t

[otb-users] Re: Construction of a covariance matrix from a sinclair matrix to analyze entropy-alpha algorithm

2016-09-20 Thread Bambang Trisasongko
Hello, Relation of covariance and scattering matrix is given in the book. Please read section 6.1, then see chapter 7. HTH, Bambang On Tuesday, September 20, 2016 at 10:13:20 PM UTC+10, Pavan A wrote: > > Hello all, > > I am an independent researcher currently carrying out research on the > to