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

Created byPraveen Suvarna

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492 Solutions
182 Solvers

LastSolutionsubmitted on Oct 27, 2021

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Problem Comments

13 Comments

13 Comments

Show 10 older comments

J-G van der Toornon 22 Nov 2012

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.R.! Menzingeron 22 Nov 2012

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

Praveen Suvarnaon 22 Nov 2012

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

Andrei Bobrovon 22 Nov 2012

use 'isequaln'

Jameson 23 Nov 2012

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

Batman?

@bmtran (Bryant Tran)on 23 Nov 2012

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

Davidon 24 Nov 2012

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

nyancaton 26 Nov 2012

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.

Praveen Suvarnaon 26 Nov 2012

Is it fine now?

Davidon 26 Nov 2012

不完全是。你仍然需要使用“isequalwithequalnans" (or "isequaln" in newer versions) instead of "isequal".

Ned Gulleyon 27 Nov 2012

I updated the test suite with the suggestions made here. I believe it works now.

Jean-Marie Sainthillieron 29 Nov 2012

The particular number is 1

Andrew Newellon 19 Jun 2013

This problem would be much better if the "particular number" was one of the arguments to the function.

Solution Comments

Solution 168227

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1 Comment

Jameson 27 Nov 2012

I wrote this solution when there were multiple problems with the test suite. It's an ugly hack, and not a "real" solution. Now that the test suite is working, please ignore this solution.

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