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

Solution 1190118

Submitted on 16 May 2017 by Chong Zhang

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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 = 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 = cell [1×2 double]
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 = 1×2 cell array [1×3 double] [1×3 double]

Test

Status

Code Input and Output

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 = 1×3 cell array [1×3 double] [1×2 double] [1×3 double]

Pass

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

polyOut = cell [1×2 double]

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 = 1×2 cell array [1×3 double] [1×3 double]