[R] Help needed

[Sascha Vieweg]

On 11-01-27 15:12, Sascha Vieweg wrote:

> On 11-01-27 13:16, Ben Boyadjian wrote:
>
>>  Hello I am trying to solve these problems and I am not allowed to use
>>  loops or ifs.
>>
>>  1st Question
>>  My first question is that I have generated 100 random numbers from the
>>  uniform distribution then
>>  A)add only the negative integers.
>
> x <- c(1, 1.3)
> x==round(x, 0)

Oh, wrong, sorry! This code belongs to your question about finding 
the integers!

>>  B)add elements until the first appearance of a negative element.
>
> y <- c(1, 3, 7, -2, 3, -7)
> sum(y[1:which(y<0)[1]-1])
>
>>  I know how to choose the negative elements for A but how to find integers?
>>  And I dont know what to do for B.
>>
>>  2nd Question Simulate 1000 observations from the student-t distribution
>>  with 3 degrees of freedom and then calculate the truncated mean by
>>  excluding bottom 5% and top 5%.
>
> Dono. Ideas?
>
>>  Thank yoou
>> 
>>
>>   [[alternative HTML version deleted]]
>>
>>  ______________________________________________
>>  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.
>> 
>
>

-- 
Sascha Vieweg, saschaview at gmail.com