nag_fit_dim2_spline_derivm (e02dhc) Example Program Results Spline fit used smoothing factor s = 1.0000e-01. Number of knots in each direction = 10, 13. Sum of squared residuals = 1.0004e-01. Derivative of spline has order nux, nuy = 1, 0. Spline evaluated on X-Y grid (X across, Y down): 0.00 1.00 2.00 3.00 4.00 5.00 0.00 0.992 2.043 3.029 4.014 5.021 5.997 1.00 0.541 1.088 1.607 2.142 2.705 3.239 2.00 -0.417 -0.829 -1.241 -1.665 -2.083 -2.485 3.00 -0.978 -1.975 -2.914 -3.913 -4.965 -5.924 4.00 -0.648 -1.363 -1.991 -2.606 -3.251 -3.933 Spline derivative evaluated on X-Y grid: 0.00 1.00 2.00 3.00 4.00 5.00 0.00 1.093 1.013 0.970 1.004 1.001 0.939 1.00 0.565 0.531 0.515 0.558 0.559 0.499 2.00 -0.429 -0.404 -0.421 -0.423 -0.412 -0.389 3.00 -1.060 -0.951 -0.949 -1.048 -1.031 -0.861 4.00 -0.779 -0.661 -0.608 -0.628 -0.663 -0.701