Cody

# Problem 2909. Approximation of Pi (vector inputs)

Solution 1941574

Submitted on 18 Sep 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
n = 1:5; y_correct = [-0.858407346410207 0.474925986923126 -0.325074013076874 0.246354558351698 -0.198089886092747]; answers = pi_approx(n); for i = 1:numel(n) assert(abs(answers(i)-y_correct(i))<(100*eps)) end

Error using ^ (line 51) Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'. Error in pi_approx (line 4) s=s+(-1)^(2*n+1)/(2*n+1); Error in Test1 (line 3) answers = pi_approx(n);

2   Fail
n = 2:2:10; y_correct = [0.474925986923126 0.246354558351698 0.165546477543617 0.124520836517975 0.099753034660390]; answers = pi_approx(n); for i = 1:numel(n) assert(abs(answers(i)-y_correct(i))<(100*eps)) end

Error using ^ (line 51) Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'. Error in pi_approx (line 4) s=s+(-1)^(2*n+1)/(2*n+1); Error in Test2 (line 3) answers = pi_approx(n);

3   Fail
n = 5:5:25; y_correct = [-0.198089886092747 0.099753034660390 -0.066592998672151 0.049968846921953 -0.039984031845239]; answers = pi_approx(n); for i = 1:numel(n) assert(abs(answers(i)-y_correct(i))<(100*eps)) end

Error using ^ (line 51) Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'. Error in pi_approx (line 4) s=s+(-1)^(2*n+1)/(2*n+1); Error in Test3 (line 3) answers = pi_approx(n);

4   Fail
n = 10:10:100; y_correct = [0.099753034660390 0.049968846921953 0.033324086890846 0.024996096795960 0.019998000998782 0.016665509660796 0.014284985608559 0.012499511814072 0.011110768228485 0.009999750031239]; answers = pi_approx(n); for i = 1:numel(n) assert(abs(answers(i)-y_correct(i))<(100*eps)) end

Error using ^ (line 51) Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'. Error in pi_approx (line 4) s=s+(-1)^(2*n+1)/(2*n+1); Error in Test4 (line 3) answers = pi_approx(n);