Cody

# Problem 635. Angle between Two Vectors

Solution 1849613

Submitted on 15 Jun 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
a = [1 0]; b = [0 1]; expected=pi/2; theta = solve_included_vector_angle(a,b) assert(0.99*expected-.001<=theta && theta<=expected*1.01+.001 ) % Is there a better way to allow tolerances?

Error using cross A and B must be of length 3 in the dimension in which the cross product is taken. Error in solve_included_vector_angle (line 2) atan2d(norm(cross(a,b)),dot(a,b)) Error in Test1 (line 4) theta = solve_included_vector_angle(a,b)

2   Fail
a = [1 1 0]; b = [1 1 2^0.5]; expected=pi/4; theta = solve_included_vector_angle(a,b) assert(0.99*expected-.001<=theta && theta<=expected*1.01+.001 )

ans = 45 theta = 45

Assertion failed.

3   Fail
a = [2 2]; b = [0 1]; expected=pi/4; theta = solve_included_vector_angle(a,b) assert(0.99*expected-.001<=theta && theta<=expected*1.01+.001 )

Error using cross A and B must be of length 3 in the dimension in which the cross product is taken. Error in solve_included_vector_angle (line 2) atan2d(norm(cross(a,b)),dot(a,b)) Error in Test3 (line 4) theta = solve_included_vector_angle(a,b)

4   Fail
a = [-1 1]; b = [4 0]; expected=0.75*pi; theta = solve_included_vector_angle(a,b) assert(0.99*expected-.001<=theta && theta<=expected*1.01+.001 )

Error using cross A and B must be of length 3 in the dimension in which the cross product is taken. Error in solve_included_vector_angle (line 2) atan2d(norm(cross(a,b)),dot(a,b)) Error in Test4 (line 4) theta = solve_included_vector_angle(a,b)

5   Fail
a = [-1 2 3]; b = [1 2 4]; expected=0.161*pi; theta = solve_included_vector_angle(a,b) assert(0.99*expected-.001<=theta && theta<=expected*1.01+.001 )

ans = 28.9766 theta = 28.9766

Assertion failed.