Problem 42480. Go back n times

Mehmet OZC

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You will be given a column vector (such as x = [1; 2; 3; 4; 5; 6]). If (n=3) you will return following;

 [ 1 NaN NaN NaN
   2   1 NaN NaN
   3   2   1 NaN
   4   3   2   1
   5   4   3   2 
   6   5   4   3 ]

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Solution Stats

Last Solution submitted on Mar 02, 2026

4 Comments

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Alfonso Nieto-Castanon on 31 Jul 2015

I imagine you are going to need to use "isequalwithequalnans" in your testsuite instead of "isequal" for this problem

Mehmet OZC on 1 Aug 2015

Now, I have changed the assert statement

Massimo Zanetti on 26 Oct 2016

Example is wrong. Input vector x must be

x = [1; 2; 3; 4; 5; 6]

not

x = [1; 2; 3; 4; 5; 6; 7; 8]

Aditya Jain on 26 Oct 2016

Thanks Massimo. Changed it

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