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Problem 1011. Newton Interpolation

Solution 436081

Submitted on 29 Apr 2014 by Celestino
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Test Suite

Test Status Code Input and Output
1   Pass
%% Check linear interpolation X = [4800; 5100]; Y = [7.5247; 7.2851]*1e-1; x = 5000; y = Newton_Interp(X,Y,x) y_correct = 0.73650; assert(abs(y-y_correct)<1e-4)

y = 0.7365

2   Pass
%% Check Newton polynomial coefficients X = [4800; 5100]; Y = [7.5247; 7.2851]; x = 5000; y_correct = 7.3650; b_correct = [7.5247, -0.00079867]; [y,b] = Newton_Interp(X,Y,x) assert(abs(y-y_correct)<1e-4) assert(norm(b-b_correct)<1e-3)

y = 7.3650 b = 7.5247 -0.0008

3   Pass
%% Check quadratic interpolation X = [300, 400, 500]; Y = [0.616, 0.525, 0.457]; x = 350; [y,b] = Newton_Interp(X,Y,x) y_correct = 0.567625; b_correct = [0.616, -0.00091, 0.00000115]; assert(abs(y-y_correct)<1e-4) assert(norm(b-b_correct)<1e-3)

y = 0.5676 b = 0.6160 -0.0009 0.0000

4   Pass
%% Check quadratic interpolation for log X = [1, 4 6]; Y = log(X); x = 2; [y,b] = Newton_Interp(X,Y,x) y_correct = 0.5658; b_correct = [0, 0.4620981, -0.0518731]; assert(abs(y-y_correct)<1e-4) assert(norm(b-b_correct)<1e-3)

y = 0.5658 b = 0 0.4621 -0.0519

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