Top "Classification" questions

In machine learning and statistics, classification is the problem of identifying which of a set of categories a new observation belongs to, on the basis of a training set of data containing observations whose category membership (label) is known.

weka.core.UnassignedDatasetException when creating an unlabeled instance

I trained an IBK classifier with some training data that I created manually as following: ArrayList<Attribute> atts = …

java machine-learning classification weka
basic help using hmm to clasify a sequence

I am very new to matlab, hidden markov model and machine learning, and am trying to classify a given sequence …

matlab machine-learning classification hidden-markov-models
text classification methods? SVM and decision tree

i have a training set and i want to use a classification method for classifying other documents according to my …

classification svm
How to use the output from OneHotEncoder in sklearn?

I have a Pandas Dataframe with 2 categorical variables, and ID variable and a target variable (for classification). I managed to …

python pandas scikit-learn classification one-hot-encoding
Boosting classification tree in R

I'm trying to boost a classification tree using the gbm package in R and I'm a little bit confused about …

r classification boosting
Determine whether the two classes are linearly separable (algorithmically in 2D)

There are two classes, let's call them X and O. A number of elements belonging to these classes are spread …

algorithm math machine-learning classification
Weka error "cannot handle numeric class" in Java code using LibSVM

I'm trying to use a classifier LibSVM-based using Weka, but i got this error: Exception in thread "main" weka.core.…

java classification weka libsvm
What is the difference between cross-entropy and log loss error?

What is the difference between cross-entropy and log loss error? The formulae for both seem to be very similar.

machine-learning classification cross-entropy
SVM Classification - minimum number of input sets for each class

I'm trying to build an app to detect images which are advertisements from the webpages. Once I detect those I`…

machine-learning classification svm training-data
J48 tree in R - train and test classification

I want to use train and test in J48 decision-tree on R. here is my code: library("RWeka") data <…

r classification weka decision-tree j48