/**
* Transform:
*
* <p>MDs Values<br>
* (0, 1)<br>
* (10, 1)<br>
* (15, 2)<br>
* (20, 3)<br>
* (30, 3)<br>
* (50, 3)<br>
*
* <p>to
*
* <p>([0, 15], 1)<br>
* ([15, 20], 2)<br>
* ([20, 50], 3)
*/
public static IntervalFilteredHolder filter(
final double[][] intervals, final int begin, final int length) {
int size = length;
int start = begin + size;
int endIndex = 0;
// Look for the first value which is not a novalue
for (int i = 0; i < size; i++) {
if (NoValues.isDoubleNoValue(intervals[2][i]) == false) {
start = i;
break;
}
}
// Only no values?
if (start == size) {
return new IntervalFilteredHolder(new double[3][0], 0, -1);
}
int end = 0;
// Look for the last value which is not a novalue
for (int i = size - 1; i >= 0; i--) {
if (NoValues.isDoubleNoValue(intervals[2][i]) == false) {
end = i;
break;
}
}
// Only one value?
if (start == end) {
endIndex = 0;
intervals[0][endIndex] = intervals[0][start];
intervals[1][endIndex] = intervals[1][start];
intervals[2][endIndex] = intervals[2][start];
return new IntervalFilteredHolder(intervals, 0, 0);
}
endIndex = -1;
boolean out = false;
int idx1 = start;
int idx2 = start + 1;
while (true) {
while (idx2 <= end
&& NoValues.isDoubleNoValue(intervals[2][idx2]) == false
&& MathUtils.isApproximatelyEqual(intervals[2][idx1], intervals[2][idx2])) {
idx2++;
}
if (idx2 > end) {
out = true;
}
endIndex++;
intervals[0][endIndex] = intervals[0][idx1];
intervals[1][endIndex] = intervals[1][idx2 - 1];
intervals[2][endIndex] = intervals[2][idx1];
idx1 = idx2;
// skip novalues
while (idx1 <= end && NoValues.isDoubleNoValue(intervals[2][idx1]) == true) {
idx1++;
}
idx2 = idx1 + 1;
if (idx2 > end) {
if (out == false) { // one more time
endIndex++;
intervals[0][endIndex] = intervals[0][idx1];
intervals[1][endIndex] = intervals[1][idx2 - 1];
intervals[2][endIndex] = intervals[2][idx1];
}
break;
}
}
if (endIndex == -1) {
return new IntervalFilteredHolder(new double[3][0], 0, -1);
}
return new IntervalFilteredHolder(intervals, 0, endIndex);
}
/**
* Transform:
*
* <p>([0,15], 100)<br>
* ([15,20], 150)<br>
* ([30,38], 200)<br>
* ([40,50], 173)<br>
*
* <p>to
*
* <p>MDs Values<br>
* 0 100<br>
* 15 150<br>
* 20 NonValeur<br>
* 30 200<br>
* 38 NonValeur<br>
* 40 173<br>
* 50 NonValeur<br>
*/
public static double[][] buildSimpleArray(
final double[] tops, double[] bottoms, double[]... vals) {
int intervalCount = Math.min(tops.length, bottoms.length);
for (int i = 0; i < vals.length; i++) {
intervalCount = Math.min(intervalCount, vals[i].length);
}
int size = intervalCount * 2;
double[] mds = new double[size];
double[][] values = new double[vals.length][size];
double prev = 0.0;
int idx = 0;
for (int i = 0; i < intervalCount; i++) {
double top = tops[i];
double bot = bottoms[i];
if (i == 0) {
mds[idx] = top;
mds[idx + 1] = bot;
for (int n = 0; n < vals.length; n++) {
values[n][idx] = vals[n][i];
}
idx++;
prev = bot;
continue;
}
if (MathUtils.isApproximatelyEqual(top, prev) == false) {
mds[idx] = prev;
mds[idx + 1] = top;
for (int j = 0; j < vals.length; j++) {
values[j][idx] = NoValues.DOUBLE_NOVALUE;
}
idx++;
}
mds[idx] = top;
mds[idx + 1] = bot;
for (int n = 0; n < vals.length; n++) {
values[n][idx] = vals[n][i];
}
idx++;
prev = bot;
}
// Fill last one
for (int n = 0; n < vals.length; n++) {
values[n][idx] = NoValues.DOUBLE_NOVALUE;
}
// resize
double[] newMds = ArrayUtils.subarray(mds, 0, idx + 1);
double[][] newValues = new double[vals.length][];
for (int j = 0; j < vals.length; j++) {
newValues[j] = ArrayUtils.subarray(values[j], 0, idx + 1);
}
double[][] results = new double[vals.length + 1][];
results[0] = newMds;
for (int n = 1; n < results.length; n++) {
results[n] = newValues[n - 1];
}
return results;
}