[R] distance matrix

[WCD]

Wow, thank you all for advice, I'll have to get more familiar with R. The
dist() fuction is probably the right way.
Filip Kral.


Erin Hodgess-2 wrote:
> 
> Suppose you have:
> 
>> x <- runif(25)
>> y <- rnorm(25)
>> x.df <- data.frame(x,y)
>> dist(x.df)
> 
> 
> The default is euclidean distance.
> 
> Hope this helps!
> 
> Sincerely,
> Erin
> 
> 
> On Jan 20, 2008 2:41 PM, WCD <vydramail at quick.cz> wrote:
>>
>> Hello, I want do get the point to point distance matrix.
>> Suppose, I have a data frame where the first column is X and second
>> column
>> is Y coordinate of points.
>> I define a function dst(x1,y1,x2,y2) to claculate distance between two
>> points. But I don't know how to tell R to calculate dst for every two
>> points
>> and create a matrix of these distances.
>>
>> Can you give me a little guidance, please? I am quite new to R and
>> programming.
>> Thanks for every advice. Filip Kral.
>>
>> --
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>>
>> ______________________________________________
>> R-help at r-project.org mailing list
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>> PLEASE do read the posting guide
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>> and provide commented, minimal, self-contained, reproducible code.
>>
> 
> 
> 
> -- 
> Erin Hodgess
> Associate Professor
> Department of Computer and Mathematical Sciences
> University of Houston - Downtown
> mailto: erinm.hodgess at gmail.com
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

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