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## Re: Find egual number

**From**: |
Przemek Klosowski |

**Subject**: |
Re: Find egual number |

**Date**: |
Mon, 11 Feb 2019 14:38:46 -0500 |

**User-agent**: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 |

On 2/9/19 5:58 AM, LucaLuca wrote:

f=[1 2 3 4 4 7 7 6 8 5]
it's possible to find >1 egual element? i want to know this position
f(4)=4 f(5)=4
f(6)=7 f(7)=7
Ans=4,5
6,7

`I am genuinely curious---there's what looks like to be a group of
``Italian gentlemen:
`
address@hidden
address@hidden
address@hidden

`that regularly ask about Octave problems that, to me, share some common
``characteristics, in that they explore the intricacies of syntax, in ways
``that don't seem to be connected to actual practical problems. To me, it
``looks like either someone's exploration of intricacies of Matlab, or a
``series of homework etudes. It actually occurred to me that it could be a
``Google algorithm similar to Alpha Zero
``http://science.sciencemag.org/content/362/6419/1140 , trying to learn
``mathematical computing :), especially since when I tried to answer one
``of them (the last one) directly the email address bounced.
`

`But, hey, let's play along. I am not sure that I understand the problem
``as stated above but maybe something along the lines of
`
k=1:length(f)
find(f(k)==k)
or
find(f(k)!=k)
would be a solution.