Cody

# Problem 752. Is X a Fibonacci Matrix?

Solution 1726746

Submitted on 13 Feb 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
x = [0 1;1 1]; tf = true; assert(isequal(isFibMat(x),tf)) clear all;

Error using ^ 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 isFibMat (line 11) if ~isempty(n) && isequal(f^n,x) Error in Test1 (line 3) assert(isequal(isFibMat(x),tf))

2   Fail
x = [1 0;1 1]; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

Error using ^ 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 isFibMat (line 11) if ~isempty(n) && isequal(f^n,x) Error in Test2 (line 3) assert(isequal(isFibMat(x),tf))

3   Pass
x = [0 1;1 1]^40; tf = true; assert(isequal(isFibMat(x),tf)) clear all;

4   Pass
x = [0 1;1 1]^40+1; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

5   Pass
x = [0 1;1 1]^17; tf = true; assert(isequal(isFibMat(x),tf)) clear all;

6   Pass
x = [0 1;1 1]^17-5; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

7   Pass
x = [0 0 1;0 1 1;1 1 1]^3; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

8   Pass
x = [0 0 1;0 1 1]; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

9   Pass
x = [[0 1;1 1]^3 [5; 8]]; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

10   Pass
x = uint8([0 1; 1 1]^5); tf = true; assert(isequal(isFibMat(x),tf)) clear all;

11   Pass
x = -([0 1; 1 1]^5); tf = false; assert(isequal(isFibMat(x),tf)) clear all;

12   Pass
x = [0 1; 1 1]^5; x(2) = nan; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

13   Pass
x = [4 7;7 11]; tf = false; assert(isequal(isFibMat(x),tf)) clear all;

14   Fail
for ii = 1:55 assert(true==isFibMat([0 1;1 1]^ii)) end

Error using ^ 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 isFibMat (line 11) if ~isempty(n) && isequal(f^n,x) Error in Test14 (line 2) assert(true==isFibMat([0 1;1 1]^ii))