Test  Status  Code Input and Output 

1  Pass 
% !/bin/cp fib.m safe
% !/bin/rm *.*
% !/bin/mv safe fib.m
% Clean user's function from some known jailbreaking mechanisms
functions={'!','feval','eval','str2func','str2num','regex','system','dos','unix','perl','assert','fopen','write','save','setenv','path','please','for','if','while','switch','round','roundn','fix','ceil','char','floor','\.','^','power'};
fid = fopen('fib.m');
st = char(fread(fid)');
for n = 1:numel(functions)
st = regexprep(st, functions{n}, 'error(''No fancy functions!''); %','ignorecase');
end
st = regexprep(st, 'function', 'error(''No fancy functions!''); %','ignorecase',2);
fclose(fid);
fid = fopen('fib.m' , 'w');
fwrite(fid,st);
fclose(fid);

2  Fail 
n = 1:5;
f = [1 1 2 3 5];
assert(isequal(fib(n),f))
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint2 (line 3)
In solutionTest (line 5)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint2 (line 3)
In solutionTest (line 5)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint2 (line 3)
In solutionTest (line 5)]
1.0000 1.0000 1.0000 1.0000 2.0000

3  Fail 
n = 7 : 10;
f = [13 21 34 55];
assert(isequal(fib(n),f))
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint3 (line 3)
In solutionTest (line 7)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint3 (line 3)
In solutionTest (line 7)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint3 (line 3)
In solutionTest (line 7)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint3 (line 3)
In solutionTest (line 7)]
3.0000 5.0000 8.0000 13.0000

4  Fail 
n = 20 : 22;
f = [ 6765 10946 17711];
assert(isequal(fib(n),f))
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A nonprincipal matrix logarithm is returned.]
[> In logm (line 50)
In fib>@(x)expm((x1)*logm(g)) (line 3)
In fib (line 3)
In ScoringEngineTestPoint4 (line 3)
In solutionTest (line 9)]
1.0e+03 *
0.9870 0.9870 1.5970

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