Doug's MATLAB Video Tutorials

February 14th, 2012

Highlighting solutions to Project Euler problems 001-005

I’ve been excited by the great response to the Project Euler problems that I’ve posted on Cody. This video takes a look at my favorite submission for each of the first five problems. Take a look at how other people have solved these problems, you might see some MATLAB techniques that are new to you.

By Doug Hull

Doug first used MATLAB in 1994, could not figure it out until he got some help in 1995. He is now dedicated to making sure that no one else wastes a year of their life not knowing MATLAB like he did.

12:29 UTC | Posted in Format: Video, Level: Basic | Permalink | 2 Comments »

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2 Responses to “Highlighting solutions to Project Euler problems 001-005”

Alex replied on February 15th, 2012 at 10:22 UTC :

Hi Doug,

Thanks for the ideas. I like how Problem 1 was solved, but I think it should be modified slightly as follows:

function y = euler001(x)
y = sum(union(3:3:x,5:5:x))
end

Otherwise, I get y = 4+7+10… instead of y = 3+5+6+…

I may have overlooked something, but thought I’d point this out just in case.

Thanks!
Ahmed Abdullah replied on April 8th, 2012 at 04:15 UTC :

hi Alex,
No the code for the first problem is okay
union(1:3:10,1:5:10)= 1 4 6 7 10;
and union(1:3:10,1:5:10)-1 = 0 3 5 6 9;

so sum(union(1:3:10,1:5:10)-1)=0+3+5+6+9 =23