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package com.github.chen0040.rl.utils;

import java.util.List;


/**
 * Created by xschen on 10/11/2015 0011.
 */
public class MatrixUtils {
    /**
    * Convert a list of column vectors into a matrix
    */
    public static Matrix matrixFromColumnVectors(List R)
    {
        int n = R.size();
        int m = R.get(0).getDimension();

        Matrix T = new Matrix(m, n);
        for (int c = 0; c < n; ++c)
        {
            Vec Rcol = R.get(c);
            for (int r : Rcol.getData().keySet())
            {
                T.set(r, c, Rcol.get(r));
            }
        }
        return T;
    }
}