Cody

Problem 589. Matrix indexing with two vectors of indices

Solution 2083142

Submitted on 7 Jan 2020
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Test Suite

Test Status Code Input and Output
1   Fail
M = rand(4); a = [4 3 2 1]; b = [1 2 3 4]; v_correct = M([4 7 10 13]); assert(isequal(twoIndex(M,a,b),v_correct))

v = 0.0814 0.1997 0.2958 0.8670 0.1116 0.2133 0.1380 0.9442 0.5554 0.5663 0.0626 0.4769 0.9800 0.3961 0.6789 0.1101 v = 0.0814 0.2133 0.0626 0.1101

Assertion failed.

2   Fail
M = rand(4); a = [3 3 1 3]; b = [1 1 3 1]; v_correct = M([3 3 9 3]); assert(isequal(twoIndex(M,a,b),v_correct))

v = 0.9522 0.9522 0.8495 0.9522 0.9522 0.9522 0.8495 0.9522 0.8317 0.8317 0.2117 0.8317 0.9522 0.9522 0.8495 0.9522 v = 0.9522 0.9522 0.2117 0.9522

Assertion failed.

3   Pass
M = rand(100); [a,b] = size(M); v_correct = M(end); assert(isequal(twoIndex(M,a,b),v_correct))

v = 0.0560 v = 0.0560

4   Pass
M = rand(100); a = []; b = []; assert(isempty(twoIndex(M,a,b)))

v = [] v = []

5   Fail
M = 1; a = [1 1 1 1 1]; b = [1 1 1 1 1]; v_correct = [1 1 1 1 1]; assert(isequal(twoIndex(M,a,b),v_correct))

v = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 v = 1 1 1 1 1

Assertion failed.