Problem 1035. Generate a vector like 1,2,2,3,3,3,4,4,4,4

Created by Binbin Qi

Solve Later

Generate a vector like 1,2,2,3,3,3,4,4,4,4

So if n = 3, then return

 [1 2 2 3 3 3]

And if n = 5, then return

 [1 2 2 3 3 3 4 4 4 4 5 5 5 5 5]

Solve

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6802 Solutions
1877 Solvers

Last Solution submitted on Apr 01, 2020

Last 200 Solutions

Problem Comments

8 Comments

8 Comments

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Dariusz on 23 Dec 2012

function ans = GenerateVector(n)
ans = 1;
for n = 2:n
ans = [ans n*ones(1, n)];
end

could sb explain me why this code is flagged a as a bad one ?? it works !! and another thign in problem definition it is not clearly stated that the solutions must be straight code without writing a function. I wrote a function and it works well to the definition of the problem. then I am getting incorrect information after submission. dear cody team: please write more specific requirements of the problem. you will miss many misunderstandings then.

Ned Gulley on 24 Dec 2012

Your function has to use exactly the same name that is provided in the function template. In this case, the function must be called "you_fcn_name". You wrote a function called "GenerateVector". Change the name of your function and it should pass.

goc3 on 18 Nov 2016

The test suite has been expanded.

Thibault Vlieghe on 23 Jun 2019

Good problem.

Is there any way to avoid the for loop? I really want to but I don't see how right now.

Ashish Kaushik on 25 Jun 2019

Good one! took some time but finally did it.

Simon on 1 Nov 2019

Can it be done without a for loop?

Andrea Gasparri on 19 Dec 2019

Good problem.

HINT:

use command "repelem"

Solution:

A=1:n
B=repelem(A,1:n)

Stefanos Charkoutsis on 8 Feb 2020

great problem. Interesting for beginners like me.

Solution Comments

Solution 2112738

1 Comment

1 Comment

Neil Sommerville on 31 Jan 2020

It would be nice to know how the leading solution was do to be so small.

Solution 1885341

1 Comment

1 Comment

Ashish Khulbey on 27 Jul 2019

My solution size is at least 6 times than the leading solution. I would like to be enlightened...

Solution 1855317

1 Comment

1 Comment

Chris Breshike on 21 Jun 2019

what's wrong with my answer? it gives exactly the right answer just not in []
also the test suite says it gives you x but when you use x in the function it doesn't recognize x you have to use n

Solution 1744990

1 Comment

1 Comment

Jason Casey on 7 Mar 2019

Great problem

Solution 358262

1 Comment

1 Comment

Jonathan on 22 Nov 2013

Funny, I just tested you SO post too, and it has 2 nodes lest without the assignment to ans. I don't get this yet...

Solution 170884

2 Comments

2 Comments

Dariusz on 30 Nov 2012

could sb please explain me politely why this code has been rated as an incorrect one ? if you paste this in m-file it works !!!

Peng Liu on 26 Mar 2015

Function name should be your_fcn_name

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Problem 1035. Generate a vector like 1,2,2,3,3,3,4,4,4,4

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Problem 1035. Generate a vector like 1,2,2,3,3,3,4,4,4,4

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