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Test

Code Input and Output

1

Fail

%% positive integers x = 5; assert(isequal(unique(rand_plusminus1(x)),[-1;1]))

Error: Output argument "y" (and maybe others) not assigned during call to "/users/msssystem1/rand_plusminus1.m>rand_plusminus1".

2

Fail

%% one element x = 1; assert(isequal(abs(rand_plusminus1(x)),1))

Error: Output argument "y" (and maybe others) not assigned during call to "/users/msssystem1/rand_plusminus1.m>rand_plusminus1".

3

Fail

%% zero => empty matrix x = 0; assert(isequal(rand_plusminus1(x),[]))

Error: Output argument "y" (and maybe others) not assigned during call to "/users/msssystem1/rand_plusminus1.m>rand_plusminus1".

4

Fail

%% positive integers x = 999; assert(isequal(unique(rand_plusminus1(x)),[-1;1]))