Lines Matching refs:xval
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 corrected
97 zY_1[i][j] = f.value(xval[i]);
108 // For every knot (xval[i], yval[j]) of the grid, calculate corrected
123 dZdX[i][j] = f.value(xval[i]);
146 ((xval[nI] - xval[pI]) * (yval[nJ] - yval[pJ]));
151 return new BicubicSplineInterpolatingFunction(xval, yval, zY_2,
