MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

# Solution 276600

Submitted on 9 Jul 2013 by Matt Eicholtz

Correct

34Size
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### Test Suite

Test
Code Input and Output
1
Pass

```%%
x(:,:,1) = [1 2 3;4 5 6;7 8 9];
x(:,:,2) = [1 4 7;2 5 8;3 6 9];
x(:,:,3) = [1 2 3;1 2 3;1 2 3];
y_correct(:,:,1) = [1 0 0;4 5 0;7 8 9];
y_correct(:,:,2) = [1 0 0;2 5 0;3 6 9];
y_correct(:,:,3) = [1 0 0;1 2 0;1 2 3];
assert(isequal(tril3(x),y_correct))
```

2
Pass

```%%
x = cumsum(ones(3,3,50));
y_correct = repmat([1 0 0;2 2 0; 3 3 3],[1,1,50]);
assert(isequal(tril3(x),y_correct))
```

3
Pass

```%%
x = cumsum(ones(5,5,100),2);
y_correct = repmat(tril(cumsum(ones(5,5),2)),[1,1,100]);
assert(isequal(tril3(x),y_correct))
```

4
Pass

```%%
x = rand([1 1 400]);
y_correct = x;
assert(isequal(tril3(x),y_correct))
```

5
Pass

```%%
x = reshape(1:40,[2,2,10]);
y_correct(:,:,1) = [1 0;2 4];
y_correct(:,:,2) = [5 0;6 8];
y_correct(:,:,3) = [9 0;10 12];
y_correct(:,:,4) = [13 0;14 16];
y_correct(:,:,5) = [17 0;18 20];
y_correct(:,:,6) = [21 0;22 24];
y_correct(:,:,7) = [25 0;26 28];
y_correct(:,:,8) = [29 0;30 32];
y_correct(:,:,9) = [33 0;34 36];
y_correct(:,:,10) = [37 0;38 40];
assert(isequal(tril3(x),y_correct))
```

6
Pass

```%%
x = randi([0 1],[4,4,5]);
y_correct(:,:,1) = tril(x(:,:,1));
y_correct(:,:,2) = tril(x(:,:,2));
y_correct(:,:,3) = tril(x(:,:,3));
y_correct(:,:,4) = tril(x(:,:,4));
y_correct(:,:,5) = tril(x(:,:,5));
assert(isequal(tril3(x),y_correct))
```