does matlab 2015 support svm multiclass??
显示 更早的评论
I use matlab 2013b for programmation but this version does not support svm multiclass. my question there is another version that support svm for multi classification?
采纳的回答
Walter Roberson
2015-5-22
编辑：Walter Roberson
2015-5-22
1 个投票
"ClassificationECOC is an error-correcting output codes (ECOC) classifier for multiclass learning by reduction to multiple, binary classifiers such as support vector machines (SVMs). Train a ClassificationECOC classifier using fitcecoc and the training data."
Real multiclass SVM is really slow and needs a lot of memory, and is considered "feasible" (under a loose sense of the word) for at most 3 classes, and "possible if you are willing to wait several days" for 4 classes, but a matter for supercomputer clusters for 5 or more classes.
2 个评论
Sahar abdalah
2015-5-22
Walter Roberson
2015-5-23
It looks to me as if it can handle a large number of classes, but the computation is going to involve a decision matrix which is potentially large; see <http://www.mathworks.com/help/stats/classificationecoc-class.html#bue4w15 Coding Design" for how many rows the matrix would have.
I have not investigated how to interpret the various kinds of decision outputs.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Classification Ensembles 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
