my data looks like this:
PM10 Ref UZ JZ WT RH FT WR
1 10.973195 4.338874 nein Winter Dienstag ja nein West
2 6.381684 2.250446 nein Sommer Sonntag nein ja Süd
3 62.586512 66.304869 ja Sommer Sonntag nein nein Ost
4 5.590101 8.526152 ja Sommer Donnerstag nein nein Nord
5 30.925054 16.073091 nein Winter Sonntag nein nein Ost
6 10.750567 2.285075 nein Winter Mittwoch nein nein Süd
7 39.118316 17.128691 ja Sommer Sonntag nein nein Ost
8 9.327564 7.038572 ja Sommer Montag nein nein Nord
9 52.271744 15.021977 nein Winter Montag nein nein Ost
10 27.388416 22.449102 ja Sommer Montag nein nein Ost
11 6.460829 4.486329 ja Winter Samstag nein nein Süd
12 5.937690 10.247768 ja Sommer Sonntag nein nein Nord
13 14.004685 5.155790 nein Winter Sonntag nein nein Nord
14 12.244333 7.063825 ja Sommer Mittwoch nein ja Nord
15 35.195541 12.148438 nein Winter Montag nein nein Ost
.
.
.
.
til 200
now I should illustrate the Central limit theorem with my data. I need to
make 80 times the arithmetic means of each of the 100 poisson distributet
random numbers with an expected value 7.
the hint says I need a metrices first which includes all of the 8000 values.
but I have no idea where the 8000 values are and how to make the matrices.
please help me
[[alternative HTML version deleted]]
Hi Maggy, Sorry, I cannot help you. But as I am pretty new to R, I am interested in this assigment. May I ask you to post it? z On Sun, Aug 14, 2011 at 3:16 PM, maggy yan <kiotoqq at googlemail.com> wrote:> my data looks like this: > > ? ? ? ? PM10 ? ? ? Ref ? UZ ? ? JZ ? ? ? ? WT ? RH ? FT ? WR > 1 ? 10.973195 ?4.338874 nein Winter ? Dienstag ? ja nein West > 2 6.381684 ?2.250446 nein Sommer ? ?Sonntag nein ? ja ?S?d > 3 ? 62.586512 66.304869 ? ja Sommer ? ?Sonntag nein nein ?Ost > 4 5.590101 ?8.526152 ? ja Sommer Donnerstag nein nein Nord > 5 ? 30.925054 16.073091 nein Winter ? ?Sonntag nein nein ?Ost > 6 ? 10.750567 ?2.285075 nein Winter ? Mittwoch nein nein ?S?d > 7 ? 39.118316 17.128691 ? ja Sommer ? ?Sonntag nein nein ?Ost > 8 9.327564 ?7.038572 ? ja Sommer ? ? Montag nein nein Nord > 9 ? 52.271744 15.021977 nein Winter ? ? Montag nein nein ?Ost > 10 ?27.388416 22.449102 ? ja Sommer ? ? Montag nein nein ?Ost > 11 ? 6.460829 ?4.486329 ? ja Winter ? ?Samstag nein nein ?S?d > 12 ? 5.937690 10.247768 ? ja Sommer ? ?Sonntag nein nein Nord > 13 ?14.004685 ?5.155790 nein Winter ? ?Sonntag nein nein Nord > 14 ?12.244333 ?7.063825 ? ja Sommer ? Mittwoch nein ? ja Nord > 15 ?35.195541 12.148438 nein Winter ? ? Montag nein nein ?Ost > . > . > . > . > til 200 > now I should illustrate the Central limit theorem with my data. I need to > make 80 times the arithmetic means of each of the 100 poisson distributet > random numbers with an expected value 7. > the hint says I need a metrices first which includes all of the 8000 values. > but I have no idea where the 8000 values are and how to make the matrices. > please help me > > ? ? ? ?[[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. > >
Hi: This definitely sounds like a homework problem but it's very easy to do in R if you think about it the right way. (1) Generate a matrix of random numbers. This is easier than it looks, since you can generate a long vector of random numbers and then reshape it into a matrix. Typically, a row corresponds to a single random sample, so that should tell you how many columns you need; the number of samples tells you the number of rows. Type ?rpois at the R prompt to see its help page. If necessary, also read the result of ?matrix. (2) See the help page of the function rowMeans(). Run it on your matrix; it will return a vector. (3) Plot the histogram. See ?hist (4) Read the Posting Guide, which is linked at the bottom of this e-mail, and pay attention to the policy on homework questions. (This should be point (0), but I'm being pragmatic.) Dennis On Sun, Aug 14, 2011 at 6:16 AM, maggy yan <kiotoqq at googlemail.com> wrote:> my data looks like this: > > ? ? ? ? PM10 ? ? ? Ref ? UZ ? ? JZ ? ? ? ? WT ? RH ? FT ? WR > 1 ? 10.973195 ?4.338874 nein Winter ? Dienstag ? ja nein West > 2 ? ?6.381684 ?2.250446 nein Sommer ? ?Sonntag nein ? ja ?S?d > 3 ? 62.586512 66.304869 ? ja Sommer ? ?Sonntag nein nein ?Ost > 4 ? ?5.590101 ?8.526152 ? ja Sommer Donnerstag nein nein Nord > 5 ? 30.925054 16.073091 nein Winter ? ?Sonntag nein nein ?Ost > 6 ? 10.750567 ?2.285075 nein Winter ? Mittwoch nein nein ?S?d > 7 ? 39.118316 17.128691 ? ja Sommer ? ?Sonntag nein nein ?Ost > 8 ? ?9.327564 ?7.038572 ? ja Sommer ? ? Montag nein nein Nord > 9 ? 52.271744 15.021977 nein Winter ? ? Montag nein nein ?Ost > 10 ?27.388416 22.449102 ? ja Sommer ? ? Montag nein nein ?Ost > 11 ? 6.460829 ?4.486329 ? ja Winter ? ?Samstag nein nein ?S?d > 12 ? 5.937690 10.247768 ? ja Sommer ? ?Sonntag nein nein Nord > 13 ?14.004685 ?5.155790 nein Winter ? ?Sonntag nein nein Nord > 14 ?12.244333 ?7.063825 ? ja Sommer ? Mittwoch nein ? ja Nord > 15 ?35.195541 12.148438 nein Winter ? ? Montag nein nein ?Ost > . > . > . > . > til 200 > now I should illustrate the Central limit theorem with my data. I need to > make 80 times the arithmetic means of each of the 100 poisson distributet > random numbers with an expected value 7. > the hint says I need a metrices first which includes all of the 8000 values. > but I have no idea where the 8000 values are and how to make the matrices. > please help me > > ? ? ? ?[[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. > >