Greeting
I want to move a window over a column in a Matrix. For example. I have a
8X1 Matrix and I want to read the data from 1 until 5, for the second time
2 until 6, third time 3 till 7 and... and do something on this values and
show them in a diagramm:
I wrote this code:
#here I make an nX1 Matrix
df<-matrix(unlist(datalist,use.names=FALSE),ncol=1,byrow=TRUE)#window:
the length of the window and Step:wenn this value 1 is, then for the
second time it begins from 2while(n+window<=length(df)){
k<-matrix(df[n:n+window-1,1])
#plot(k) I want to do something over k and show it in a plot
n<-n+step}
but my code doesn't work
- I can't show a plot inside of for loop
- I cant show the value of K inside of for loop
- If I show k outside of the loop I can only see one integer value
and not a matrix
if df:
12 13 14 15 16 17 18 8 19
then k outside of the loop contain only 18.
Could you please inform me how can I solve my problem?
[[alternative HTML version deleted]]
Perhaps ?filter -- Bert On Thu, Sep 26, 2013 at 6:30 AM, Babak Bastan <babakbsn@gmail.com> wrote:> Greeting > > I want to move a window over a column in a Matrix. For example. I have a > 8X1 Matrix and I want to read the data from 1 until 5, for the second time > 2 until 6, third time 3 till 7 and... and do something on this values and > show them in a diagramm: > > I wrote this code: > > #here I make an nX1 Matrix > > df<-matrix(unlist(datalist,use.names=FALSE),ncol=1,byrow=TRUE)#window: > the length of the window and Step:wenn this value 1 is, then for the > second time it begins from 2while(n+window<=length(df)){ > k<-matrix(df[n:n+window-1,1]) > #plot(k) I want to do something over k and show it in a plot > n<-n+step} > > but my code doesn't work > > - I can't show a plot inside of for loop > - I cant show the value of K inside of for loop > - If I show k outside of the loop I can only see one integer value > and not a matrix > > if df: > > 12 13 14 15 16 17 18 8 19 > > then k outside of the loop contain only 18. > > Could you please inform me how can I solve my problem? > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. >-- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm [[alternative HTML version deleted]]
On Sep 26, 2013, at 8:30 AM, Babak Bastan wrote:> Greeting > > I want to move a window over a column in a Matrix. For example. I > have a > 8X1 Matrix and I want to read the data from 1 until 5, for the > second time > 2 until 6, third time 3 till 7 and... and do something on this > values and > show them in a diagramm:I tried looking at the code below but could not tell what was failing because you did not say what you meant by "did not work". If you got an error you should have posted it. I am guessing the "it" you wanted plotted were just the values against an index. The embed function will construct a matrix something like I imagine you want, albeit with columns in reverse order: > M <- 1:8 > embed(M, 3) [,1] [,2] [,3] [1,] 3 2 1 [2,] 4 3 2 [3,] 5 4 3 [4,] 6 5 4 [5,] 7 6 5 [6,] 8 7 6 > layout(c(1:3)) > for(i in 3:1) plot( embed(M,3)[ , i]) -- David.> > I wrote this code: > > #here I make an nX1 Matrix > > df<-matrix(unlist(datalist,use.names=FALSE),ncol=1,byrow=TRUE)#window: > the length of the window and Step:wenn this value 1 is, then for the > second time it begins from 2while(n+window<=length(df)){ > k<-matrix(df[n:n+window-1,1]) > #plot(k) I want to do something over k and show it in a plot > n<-n+step} > > but my code doesn't work > > - I can't show a plot inside of for loop > - I cant show the value of K inside of for loop > - If I show k outside of the loop I can only see one integer value > and not a matrix > > if df: > > 12 13 14 15 16 17 18 8 19 > > then k outside of the loop contain only 18. > > Could you please inform me how can I solve my problem? > >-- David Winsemius, MD Alameda, CA, USA
On 26-09-2013, at 15:30, Babak Bastan <babakbsn at gmail.com> wrote:> Greeting > > I want to move a window over a column in a Matrix. For example. I have a > 8X1 Matrix and I want to read the data from 1 until 5, for the second time > 2 until 6, third time 3 till 7 and... and do something on this values and > show them in a diagramm: > > I wrote this code: > > #here I make an nX1 Matrix > > df<-matrix(unlist(datalist,use.names=FALSE),ncol=1,byrow=TRUE)#window: > the length of the window and Step:wenn this value 1 is, then for the > second time it begins from 2while(n+window<=length(df)){ > k<-matrix(df[n:n+window-1,1]) > #plot(k) I want to do something over k and show it in a plot > n<-n+step} > > but my code doesn't work > > - I can't show a plot inside of for loop > - I cant show the value of K inside of for loop > - If I show k outside of the loop I can only see one integer value > and not a matrix > > if df: > > 12 13 14 15 16 17 18 8 19 > > then k outside of the loop contain only 18. > > Could you please inform me how can I solve my problem? >It is impossible to give you proper advice since your code has been messed up by posting in HTML. And you have not given a reproducible example. Other have already made some suggestions. I guessing that the expression k<-matrix(df[n:n+window-1,1]) is not doing what you expect. You likely want rows n upto and including n+window-1. If so use () around the part after the : like this k<-matrix(df[n:(n+window-1),1]) Read the "An Introduction to R" manual especially section 2.3 Generating regular sequences (R-3.0.2) Berend> [[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.