Cody

# Problem 1227. Generate a random matrix A of (1,-1)

Solution 1878651

Submitted on 19 Jul 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
x = 5; assert(isequal(unique(rand_plusminus1(x)),[-1;1]))

Output argument "y" (and maybe others) not assigned during call to "rand_plusminus1". Error in Test1 (line 2) assert(isequal(unique(rand_plusminus1(x)),[-1;1]))

2   Fail
x = 1; assert(isequal(abs(rand_plusminus1(x)),1))

Output argument "y" (and maybe others) not assigned during call to "rand_plusminus1". Error in Test2 (line 2) assert(isequal(abs(rand_plusminus1(x)),1))

3   Fail
x = 0; assert(isequal(rand_plusminus1(x),[]))

Error using randi First input must be a positive scalar integer value IMAX, or two integer values [IMIN IMAX] with IMIN less than or equal to IMAX. Error in rand_plusminus1 (line 5) sign(randi(x,1)-1); Error in Test3 (line 2) assert(isequal(rand_plusminus1(x),[]))

4   Fail
x = 999; assert(isequal(unique(rand_plusminus1(x)),[-1;1]))

Output argument "y" (and maybe others) not assigned during call to "rand_plusminus1". Error in Test4 (line 2) assert(isequal(unique(rand_plusminus1(x)),[-1;1]))