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Merged Mathematics class

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This commit is contained in:
Marcel Kronfeld 2010-01-08 09:31:46 +00:00
parent 00ddb505ac
commit bb67e727bb
1 changed files with 39 additions and 3 deletions
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42
src/eva2/tools/math/Mathematics.java
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@ -446,10 +446,21 @@ public class Mathematics {
*/
public static double[] svAdd (double s, double[] v) {
double[] res = new double[v.length];
svAdd(s, v, res);
return res;
}
/**
* Add each entry of a vector with a scalar in a result vector.
*
* @param s
* @param v
* @return
*/
public static void svAdd(double s, double[] v, double[] res) {
for (int i = 0; i < v.length; i++) {
res[i] = v[i] + s;
}
return res;
}
/**
@ -862,7 +873,7 @@ public class Mathematics {
* @param range
* @return
*/
public static double[] shiftRange(double[][] range) {
public static double[] getAbsRange(double[][] range) {
double[] ret = new double[range.length];
for (int i = 0; i < ret.length; i++) {
ret[i]=range[i][1]-range[i][0];
@ -870,6 +881,31 @@ public class Mathematics {
return ret;
}
/**
* Shift bounds by a constant value in every dimension.
*
* @param range
* @return
*/
public static void shiftRange(double[][] range, double dist) {
for (int i = 0; i < range.length; i++) {
svAdd(dist, range[i]);
}
}
/**
* Shift bounds by a constant value in every dimension. The dists
* must be of dimensions as the range.
*
* @param range
* @return
*/
public static void shiftRange(double[][] range, double[] dists) {
for (int i = 0; i < range.length; i++) {
svAdd(dists[i], range[i]);
}
}
/**
* Project the values in x to the range given. The range must be an vector of 2d-arrays
* each of which containing lower and upper bound in the i-th dimension.
@ -905,7 +941,7 @@ public class Mathematics {
* @param range
*/
public static void scaleRange(double rangeScaleFact, double[][] range) {
double[] intervalLengths=Mathematics.shiftRange(range);
double[] intervalLengths=Mathematics.getAbsRange(range);
double[] tmpInts=Mathematics.svMult(rangeScaleFact, intervalLengths);
Mathematics.vvSub(tmpInts, intervalLengths, tmpInts); // this is what must be added to range interval
for (int i=0; i<range.length; i++) {