how to convert a numeric variable into categorical variable in matlab

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pavan sunder
pavan sunder 2016-10-12
编辑： Guillaume 2016-10-12
i have a normalized numeric vector which ranges between -1 and +1. i want to use this as a response variable in my classification learner which requires conversion into a categorical variable. i would like to have 3 categories - < 0, 0-0.5, > 0.5. Kindly help me with a matlab code.

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Guillaume
Guillaume 2016-10-12
编辑：Guillaume 2016-10-12
The first line of the documentation of categorical says: "To group numeric data into categories, use discretize." So:
x = rand(1, 20) * 2 - 1; %random numbers between -1 and 1
y = discretize(x, [-1 0 0.5 1], 'categorical')

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