How to put a label of type string in a matrix (KNN)

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siline
11 ●1 ●3

This line put a label for a trainData mat

train_labels.push_back(new Mat (1,1,CvType.CV_32FC1,new Scalar(i)))

I would put a string label instead of a float label .is it possible ?

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berak
32993 ●7 ●81 ●312

no, you cannot do this.

instead, use a lookup table of strings, and use the prediction / label value as index, maybe like this:

String lut [] = {"apples", "pears", "oranges"};
int predicted = knn.findNearest( testData, 3);
String fruit = lut[predicted];

(btw, you should use integer labels for KNearest, not float)

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Asked: Apr 15 '16

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Last updated: Apr 15 '16