Cody

Problem 85. Remove the polynomials that have positive real elements of their roots.

Solution 2615281

Submitted on 26 Jun 2020 by 春樹 内糸
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Test Suite

Test Status Code Input and Output
1   Pass
in = {[1 2 1],[1 -1],[1 1],[1 53 6]}; out_correct = {[1 2 1],[1 1],[1 53 6]}; assert(isequal(find_stable(in),out_correct))

polyOut = 0×0 empty cell array p = 1 2 1 rs = -1 -1 polyOut = 1×1 cell array {1×3 double} p = 1 -1 rs = 1 p = 1 1 rs = -1 polyOut = 1×2 cell array {1×3 double} {1×2 double} p = 1 53 6 rs = -52.8865 -0.1135 polyOut = 1×3 cell array {1×3 double} {1×2 double} {1×3 double}

2   Pass
in = {[1 1],[1 -1]}; out_correct = {[1 1]}; assert(isequal(find_stable(in),out_correct))

polyOut = 0×0 empty cell array p = 1 1 rs = -1 polyOut = 1×1 cell array {1×2 double} p = 1 -1 rs = 1

3   Pass
in = {[1 0 1],[2 -5 2],[2 5 2]}; out_correct = {[1 0 1],[2 5 2]}; assert(isequal(find_stable(in),out_correct))

polyOut = 0×0 empty cell array p = 1 0 1 rs = 0.0000 + 1.0000i 0.0000 - 1.0000i polyOut = 1×1 cell array {1×3 double} p = 2 -5 2 rs = 2.0000 0.5000 p = 2 5 2 rs = -2.0000 -0.5000 polyOut = 1×2 cell array {1×3 double} {1×3 double}

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