[R] for cycle with uncontinuous numbers

[Marcio Resende]

Dear John,
What I am trying to do is a genetic analysis and the "i" in my cycle are the
numbers of markers I am testing.
I know the code is not right, but what i wanted to do was to fill this 6 row
matrix with the numbers in x
So basically I wanted the cycle to loop only with the values on x
(50,100,200,300,900,2343) and not the the rest of the values
Do you know how to do it?

In the example I wanted my final test matrix to be
[50
100
200
300
900
2343]
dim(test) <- still 6x1

Thanks for the help




jholtman wrote:
> 
> It is unclear exactly what you are trying to do.  Since your 'test'
> matrix is only 6 rows in length, then when you extend it by trying to
> store into 50 for example, it will fill in the rest of the new values
> with NA.  Can you explain what you think the code is supposed to do?
> It is doing exactly what you are asking it to do with the script you
> provided.
> 
> On Sun, Sep 27, 2009 at 10:09 AM, Marcio Resende
> <mresendeufv at yahoo.com.br> wrote:
>>
>> Hi Tobias, thanks for the help,
>> the code I am using is quite long, but basically what I tried to do was
>>
>> test <- matrix(0,6,1)
>> x <- matrix( c(50,100,200,300,900,2343) ,ncol = 1)
>> for (i in x){
>> test [i] <- (i)
>> }
>>
>> but this code returns NA for all the elements which are not x
>>
>>
>>
>>
>> Tobias Verbeke-2 wrote:
>>>
>>>> Hi nice people,
>>>
>>> :-)
>>>
>>>> I would like to do a for cycle but i wish it to assume only the numers
>>>> 50,
>>>> 100, 200, 300, 900 and 2343
>>>> I tried to do something like
>>>>
>>>> x <- c(50,100,200,300,900,2343)
>>>> for (i in x){
>>>> #.....
>>>> }
>>>>
>>>> But it didn´t work
>>>
>>> If you would use a reproducible code example we
>>> could point out where the error comes from;
>>> otherwise we can only tell this should work;
>>> try
>>>
>>> x <- c(50,100,200,300,900,2343)
>>> for (i in x){
>>>    cat(i^2, "\n")
>>> }
>>> # 2500
>>> # 10000
>>> # 40000
>>> # 90000
>>> # 810000
>>> # 5489649
>>>
>>> HTH,
>>> Tobias
>>>
>>> ______________________________________________
>>> 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.
>>>
>>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/for-cycle-with-uncontinuous-numbers-tp25630831p25633906.html
>> Sent from the R help mailing list archive at Nabble.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.
>>
> 
> 
> 
> -- 
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
> 
> What is the problem that you are trying to solve?
> 
> ______________________________________________
> 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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