Problem 1048. Detect a number and replace with two NaN's

The test-suite is incorrectly programmed. Isequal does not work for nan's:
isequal(nan,nan) is never true.

Furthermore, the line "if n=1" is an incorrect statement.

J.G. is right!! please correct it!

Dear all,
You can make use of 'isnan'
Try.
It can be solved...

use 'isequaln'

NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN...

Batman?

the other commenters are right. see: http://www.mathworks.com/help/matlab/ref/isequalwithequalnans.html

Still, the open "if" statement in the test suite will not pass any solutions. Consider making "n" an argument?

the problem can be solved, but the test suite has bugs like everyone else commented. please fix the open "if" and isequal on NaN's i.e. assert(isequal(y_correct, y_correct)) does not pass in the second test.

Is it fine now?

Not quite. You will still need to use "isequalwithequalnans" (or "isequaln" in newer versions) instead of "isequal".