/**
* <p>
* Sets each element in the matrix to a value drawn from an Gaussian distribution with the specified mean and
* standard deviation
* </p>
*
* @param mat The matrix who is to be randomized. Modified.
* @param mean Mean value in the distribution
* @param stdev Standard deviation in the distribution
* @param rand Random number generator used to fill the matrix.
*/
public static void fillGaussian(DMatrixD1 mat, double mean, double stdev, IMersenneTwister rand)
{
double[] d = mat.getData();
int size = mat.getNumElements();
for (int i = 0; i < size; i++)
{
d[i] = mean + stdev * (double)rand.NextGaussian();
}
}
/**
* <p>
* Sets each element in the matrix to a value drawn from an Gaussian distribution with the specified mean and
* standard deviation
* </p>
*
* @param mat The matrix who is to be randomized. Modified.
* @param mean Mean value in the distribution
* @param stdev Standard deviation in the distribution
* @param randJava.Util.Random number generator used to fill the matrix.
*/
public static void fillGaussian(DMatrixD1 mat, double mean, double stdev, Java.Util.Random rand)
{
double[] d = mat.getData();
int size = mat.NumElements;
Java.Util.Random random2 = new Java.Util.Random();
for (int i = 0; i < size; i++)
{
d[i] = mean + stdev * (double)random2.NextGaussian();
}
}
/**
* <p>
* Sets each element in the matrix to a value drawn from an uniform distribution from 'min' to 'max' inclusive.
* </p>
*
* @param min The minimum value each element can be.
* @param max The maximum value each element can be.
* @param mat The matrix who is to be randomized. Modified.
* @param randJava.Util.Random number generator used to fill the matrix.
*/
public static void fillUniform(DMatrixD1 mat, double min, double max, Java.Util.Random rand)
{
double[] d = mat.getData();
int size = mat.NumElements;
double r = max - min;
for (int i = 0; i < size; i++)
{
d[i] = r * rand.NextDouble() + min;
}
}
/**
* <p>
* Sets each element in the matrix to a value drawn from an uniform distribution from 'min' to 'max' inclusive.
* </p>
*
* @param min The minimum value each element can be.
* @param max The maximum value each element can be.
* @param mat The matrix who is to be randomized. Modified.
* @param rand Random number generator used to fill the matrix.
*/
public static void fillUniform(DMatrixD1 mat, double min, double max, IMersenneTwister rand)
{
double[] d = mat.getData();
int size = mat.getNumElements();
double r = max - min;
for (int i = 0; i < size; i++)
{
d[i] = r * rand.NextDouble() + min;
}
}