|> x <- sample(0:2, 10, replace = TRUE) |> x [1] 1 0 2 1 0 2 2 0 2 1 |> tabulate(x) [1] 3 4 |> table(x) x 0 1 2 3 3 4
B. > On Nov 10, 2017, at 4:32 AM, Allaisone 1 <allaiso...@hotmail.com> wrote: > > > > Thank you for your effort Bert.., > > > I knew what is the problem now, the values (1,2,3) were only an example. The > values I have are 0 , 1, 2 . Tabulate () function seem to ignore calculating > the frequency of 0 values and this is my exact problem as the frequency of 0 > values should also be calculated for the maf to be calculated correctly. > > ________________________________ > From: Bert Gunter <bgunter.4...@gmail.com> > Sent: 09 November 2017 23:51:35 > To: Allaisone 1; R-help > Subject: Re: [R] Calculating frequencies of multiple values in 200 colomns > > [[elided Hotmail spam]] > > "For example, if I have the values : 1 , 2 , 3 in each column, applying > Tabulate () would calculate the frequency of 1 and 2 without 3" > > Huh?? > >> x <- sample(1:3,10,TRUE) >> x > [1] 1 3 1 1 1 3 2 3 2 1 >> tabulate(x) > [1] 5 2 3 > > Cheers, > Bert > > > > Bert Gunter > > "The trouble with having an open mind is that people keep coming along and > sticking things into it." > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) > > On Thu, Nov 9, 2017 at 3:44 PM, Allaisone 1 > <allaiso...@hotmail.com<mailto:allaiso...@hotmail.com>> wrote: > > Thank you so much for your replay > > > Actually, I tried apply() function but struggled with the part of writing the > appropriate function inside it which calculate the frequency of the 3 values. > Tabulate () function is a good start but the problem is that this calculates > the frequency of two values only per column which means that when I apply maf > () function , maf value will be calculated using the frequency of these 2 > values only without considering the frequency of the 3rd value. For example, > if I have the values : 1 , 2 , 3 in each column, applying Tabulate () would > calculate the frequency of 1 and 2 without 3 . I need a way to calculate the > frequencies of all of the 3 values so the calculation of maf will be correct > as it will consider all the 3 frequencies but not only 2 . > > > Regards > > Allahisone > > ________________________________ > From: Bert Gunter <bgunter.4...@gmail.com<mailto:bgunter.4...@gmail.com>> > Sent: 09 November 2017 20:56:39 > To: Allaisone 1 > Cc: r-help@R-project.org > Subject: Re: [R] Calculating frequencies of multiple values in 200 colomns > > This is not a good way to do things! R has many powerful built in functions > to do this sort of thing for you. Searching -- e.g. at > rseek.org<http://rseek.org> or even a plain old google search -- can help you > find them. Also, it looks like you need to go through a tutorial or two to > learn more about R's basic functionality. > > In this case, something like (no reproducible example given, so can't > confirm): > > apply(Values, 2, function(x)maf(tabulate(x))) > > should be close to what you want . > > > Cheers, > Bert > > > > > > > > Bert Gunter > > "The trouble with having an open mind is that people keep coming along and > sticking things into it." > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) > > On Thu, Nov 9, 2017 at 11:44 AM, Allaisone 1 > <allaiso...@hotmail.com<mailto:allaiso...@hotmail.com>> wrote: > > Hi All > > > I have a dataset of 200 columns and 1000 rows , there are 3 repeated values > under each column (7,8,10). I wanted to calculate the frequency of each value > under each column and then apply the function maf () given that the frequency > of each value is known. I can do the analysis step by step like this :- > > >> Values > > > A B C ... 200 > > 1 7 10 7 > > 2 7 8 7 > > 3 10 8 7 > > 4 8 7 10 > > . > > . > > . > > > > > For column A : I calculate the frequency for the 3 values as follows : > > count7 <- length(which(Values$A == 7)) > > count8 <- length(which(Values$A == 8)) > > count10 <- length(which(Values$A == 10)) > > > count7 = 2, count8 = 1 , count10= 1. > > > Then, I create a vector and type the frequencies manually : > > > Freq<- c( count7=2 ,count8= 1,count10=1) > > > Then I apply the function maf () :- > > maf(Freq) > > > This gives me the result I need for column A , could you please help me > > to perform the analysis for all of the 200 columns at once ? > > > Regards > > Allahisone > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To > UNSUBSCRIBE and more, see > 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. > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
