Cody

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

Solution 489584

Submitted on 22 Aug 2014 by goc3
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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))

y = 4.5000 3.3300 3.0000 2.0000 1.0000 idx = 1

2   Pass
%% x = [2 4.5 3 1 3.33]; n = 5; y_correct = 4; assert(isequal(findMaxIndex(x,n),y_correct))

y = 4.5000 3.3300 3.0000 2.0000 1.0000 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))

y = Inf 4.5000 3.3300 3.0000 2.0000 1.0000 0.0100 0.0000 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))

y = Inf 4.5000 3.3300 3.0000 2.0000 1.0000 0.0100 0.0000 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))

y = 1.0e+308 * Columns 1 through 9 Inf 1.7977 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Column 10 0.0000 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 y = 1.0e+308 * Inf 0.0000 0.0000 0 0 -0.0000 -0.0000 -1.7977 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))

y = 4.5000 3.3300 3.3300 3.0000 2.0000 1.0000 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))

y = 6.0000 4.5000 3.1416 3.1416 3.1416 2.0000 0.0000 0.0000 0 idx = 3 6 8