Two dimensional interpolation of sin(x1)exp(x2) x1 x2 f(x) interpolated error 0.314159 0.100000 0.341517 0.340284 0.041937 0.314159 0.300000 0.417129 0.415569 0.051215 0.314159 0.500000 0.509483 0.507585 0.062555 0.314159 0.700000 0.622284 0.619961 0.076405 *********************************** 0.942478 0.100000 0.894102 0.894644 -0.005991 0.942478 0.300000 1.092059 1.092576 -0.007316 0.942478 0.500000 1.333843 1.334496 -0.008936 0.942478 0.700000 1.629160 1.629945 -0.010915 *********************************** 1.570796 0.100000 1.105171 1.104992 0.003595 1.570796 0.300000 1.349859 1.349462 0.004390 1.570796 0.500000 1.648721 1.648263 0.005362 1.570796 0.700000 2.013753 2.013177 0.006549 *********************************** 2.199115 0.100000 0.894102 0.894644 -0.005991 2.199115 0.300000 1.092059 1.092576 -0.007316 2.199115 0.500000 1.333844 1.334496 -0.008936 2.199115 0.700000 1.629160 1.629945 -0.010915 ***********************************