Cody

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

Solution 197863

Submitted on 28 Jan 2013
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### Test Suite

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

```[Warning: This is an obsolete function and may be removed in the future. Please use RANDI instead.] [> In randint at 41 In rand_plusminus1 at 3 In verifyCode>evaluateCode at 227 In verifyCode at 40 In fevalJSON at 14] ```

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

```[Warning: This is an obsolete function and may be removed in the future. Please use RANDI instead.] [> In randint at 41 In rand_plusminus1 at 3 In verifyCode>evaluateCode at 227 In verifyCode at 40 In fevalJSON at 14] ```

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/msssystem15/rand_plusminus1.m>rand_plusminus1". ```

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

```[Warning: This is an obsolete function and may be removed in the future. Please use RANDI instead.] [> In randint at 41 In rand_plusminus1 at 3 In verifyCode>evaluateCode at 227 In verifyCode at 40 In fevalJSON at 14] ```