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  /external/apache-commons-math/src/main/java/org/apache/commons/math/analysis/interpolation/
LoessInterpolator.java 169 * @param xval the arguments for the interpolation points
180 final double[] xval, final double[] yval) throws MathException {
181 return new SplineInterpolator().interpolate(xval, smooth(xval, yval));
187 * @param xval the arguments for the interpolation points
199 public final double[] smooth(final double[] xval, final double[] yval, final double[] weights)
201 if (xval.length != yval.length) {
203 xval.length, yval.length);
206 final int n = xval.length;
212 checkAllFiniteReal(xval, LocalizedFormats.NON_REAL_FINITE_ABSCISSA)
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SmoothingPolynomialBicubicSplineInterpolator.java 74 public BicubicSplineInterpolatingFunction interpolate(final double[] xval,
78 if (xval.length == 0 || yval.length == 0 || fval.length == 0) {
81 if (xval.length != fval.length) {
82 throw new DimensionMismatchException(xval.length, fval.length);
85 final int xLen = xval.length;
94 MathUtils.checkOrder(xval);
103 xFitter.addObservedPoint(1, xval[i], fval[i][j]);
109 // For every knot (xval[i], yval[j]) of the grid, calculate corrected
115 fval_1[i][j] = f.value(xval[i]);
131 // For every knot (xval[i], yval[j]) of the grid, calculate correcte
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SmoothingBicubicSplineInterpolator.java 50 public BivariateRealFunction interpolate(final double[] xval,
54 if (xval.length == 0 || yval.length == 0 || zval.length == 0) {
57 if (xval.length != zval.length) {
58 throw new DimensionMismatchException(xval.length, zval.length);
61 MathUtils.checkOrder(xval, OrderDirection.INCREASING, true);
64 final int xLen = xval.length;
68 // 0 <= i < xval.length
70 // zX[j][i] = f(xval[i], yval[j])
88 ySplineX[j] = spInterpolator.interpolate(xval, zX[j]);
91 // For every knot (xval[i], yval[j]) of the grid, calculate correcte
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BicubicSplineInterpolator.java 37 public BicubicSplineInterpolatingFunction interpolate(final double[] xval,
41 if (xval.length == 0 || yval.length == 0 || fval.length == 0) {
44 if (xval.length != fval.length) {
45 throw new DimensionMismatchException(xval.length, fval.length);
48 MathUtils.checkOrder(xval);
51 final int xLen = xval.length;
55 // 0 <= i < xval.length
57 // fX[j][i] = f(xval[i], yval[j])
75 ySplineX[j] = spInterpolator.interpolate(xval, fX[j]);
90 dFdX[i][j] = f.value(xval[i])
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