I am a newbie to R and Bio emails and
It is clear that newbies make "mistakes", I made several which were pointed
out and I am trying to fix them, and as I fix one I make another, in time
perhaps I will "know it all", but if it is like surgery, I will make
mistakes until I retire
But the response of the "old-timers" to these mistakes seems arrogant and
cruel and "off putting" and does NOT encourage more participation. In fact
it takes "real stuff" to continue after this putdown and that putdown.
There are 3,783 links to posting guidelines, which took 1.5 hours to find
and read and understand.
Why not a link on how the mistakes of the newbies will be dealt with?
Or a kindly response from the moderator personal to the newbie rather than
to the entire world?
Or a kindly general response as from Ben Bolker to my last infraction which
was "You might have better luck with this on the Bioconductor mailing list
..."
Rather than to the universe...
"Using the wrong list: this is for R-sig-mac, and the topic occcurred
there recently."
All in an effort to encourage promote useful and increasing exchange
participation
Or not....
Loren Engrav, MD
Univ Washington
> From: Julian Burgos <[EMAIL PROTECTED]>
> Date: Mon, 19 Nov 2007 10:44:49 -0800
> To: Epselon <[EMAIL PROTECTED]>
> Cc: <r-help@r-project.org>
> Subject: Re: [R] Trying to get around R
>
> Hello Epselon (if that is your name),
This sounds like homework questions.
> From the R-help posting guide:
"Basic statistics and classroom homework:
> R-help is not intended for
these."
If you have a specific question on R
> coding, do ask it (and provide
reproducible code). But you should not expect
> for people on the list to
do your homework for you. That is a big
> no-no.
Cheers,
Julian
>
>> Epselon wrote:
> I have three problems I am trying to
>> simulate, that I am having difficulty
> getting around with.
>
> Problem 1.
>>
> I want to determine the 85 percentile (the x value for which the sum of
>
>> probabilities becomes 0.85) of the following distributions (two binomials
>
>> and a Poisson with rate Lmbda= np of the two binomials): X ~B(10, 0.3),
>
>> Y~P(3) ,
> Z~B(30, 0.1). I want to show that that Y is a good approximation
>> for Z but
> not for X...(by examining these distributions for few
> different
>> percentiles)
>
> Problem 2:
> For a binomial distribution X ~ B(20, 0.4), I
>> want to use R to calculate
> P{|X - μ| < 2} and verify that it is near or
>> larger than 0.95. (Hint from
> the text book: Since μ = 8 and 2.3 then
>> you
>> may want to read the
> weights, or probabilities, of the values 6:10, into a
>> vector v and then use
> the command sum(v) to
> calculate the sum.) Repeat
>> this for another set of parameters of your
> choice.
>
> Problem 3:
> Draw a
>> sample of size 10, from a Poisson with Lambda= 5, and calculate the
> mean
>> and
>> the standard deviation of this sample, Repeat this calculation with
> size 20
>> and 30 and demonstrate
> that ¯X gets closer to μ as the sample size
>> increases.
>
> Thanks.
>
> I would appreciate it if someone accompanied the
>> codes with a brief
> explanation so I can be able to replicate it
>> myself.
______________________________________________
R-help@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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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
