MATLAB: How to combine features

Question

I write a code that detect people in crowed and I tray to use SURF , MSERF and HOG Features my quistion how can i combine this features ???

points1 = detectSURFFeatures(grayI)

[feature, valid_points] = extractFeatures(grayI, points1);

[regions,dd] = detectMSERFeatures(grayI);

[features2, valid_points] = extractFeatures(grayI,regions);

[featureVector,hogVisualization] = extractHOGFeatures(grayI);

Answer 1

To get the combined feature vector use

combinedVector = [feature( : ), features2 ( : ), featureVector( : )];