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Problem 1991. Find the index of nth maximum of a row vector of real numbers

Solution 2097949

Submitted on 19 Jan 2020 by Asif Newaz
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Test Suite

Test Status Code Input and Output
1   Pass
x = [2 4.5 3 1 3.33]; n = 4; y_correct = 1; assert(isequal(findMaxIndex(x,n),y_correct))

a = 4.5000 3.3300 3.0000 2.0000 y = 2 idx = 1
2   Pass
x = [2 4.5 3 1 3.33]; n = 5; y_correct = 4; assert(isequal(findMaxIndex(x,n),y_correct))

a = 4.5000 3.3300 3.0000 2.0000 1.0000 y = 1 idx = 4
3   Pass
x = [2 4.5 3 1 3.33 eps inf 0.01]; n = 1; y_correct = 7; assert(isequal(findMaxIndex(x,n),y_correct))

a = Inf y = Inf idx = 7
4   Pass
x = [2 4.5 3 1 3.33 eps inf 0.01]; n = 8; y_correct = 6; assert(isequal(findMaxIndex(x,n),y_correct))

a = Inf 4.5000 3.3300 3.0000 2.0000 1.0000 0.0100 0.0000 y = 2.2204e-16 idx = 6
5   Pass
x = [2 4.5 3 1 3.33 eps inf 0.01 realmax realmin]; n = 2; y_correct = 9; assert(isequal(findMaxIndex(x,n),y_correct))

a = 1.0e+308 * Inf 1.7977 y = 1.7977e+308 idx = 9
6   Pass
x = [-2.23 1 0 -6.65 2.63 -realmax inf 0]; n = 8 y_correct = 6; assert(isequal(findMaxIndex(x,n),y_correct))

n = 8 a = 1.0e+308 * Inf 0.0000 0.0000 0 0 -0.0000 -0.0000 -1.7977 y = -1.7977e+308 idx = 6
7   Pass
x = [2 4.5 3.33 3 1 3.33]; n = 2; y_correct = [3 6]; assert(isequal(findMaxIndex(x,n),y_correct))

a = 4.5000 3.3300 y = 3.3300 idx = 3 6
8   Pass
x = [2 4.5 pi eps eps pi 0 pi 6]; n = 3; y_correct = [3 6 8]; assert(isequal(findMaxIndex(x,n),y_correct))

a = 6.0000 4.5000 3.1416 y = 3.1416 idx = 3 6 8

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