Alright, one more idea - try the zoo merge function. According to the documentation, it allows intersection based on the index. Later you can remove the columns that you don't need. Something like:
C = merge(A, B, all=FALSE) --- the last parameter request intersect instead of union now you only need to remove the columns that you don't need from C:). Hope this helps, Ivan > Date: Sun, 13 Dec 2009 15:30:35 -0800 > From: shef...@googlemail.com > To: r-help@r-project.org > Subject: Re: [R] Need help to complete missing value (Date and Time) in Sp500 > Data > > > > Hi Ivan, > thanks for the code. > I think the other way would be to compare the both data series and remove > (shorted) the longest. For that I need a function to compare this both > Matrices and then cut the rows. > I did not find any proper packege in R to compare vectors or matrices( in > respect to one date/time colomb). > The routin must be (I think): Compare the date/time colomb of both matrices > (or ts object) and then remove the redunant rows. > > I know I asked before for extended the rows but after checking the data I > saw that the holidays make trouble and the only what I must do is compare > and remov. > > > > Thanks. > > > ivan popivanov wrote: > > > > > > Hi Hamid, > > > > Not sure why would you need missing data, but you can definitely generate > > it:). > > > > > > > > A few random thoughts: > > > > First, you can generate all possible timestamps from the beginning to the > > end of the interval (skipping weekends and skipping the stamps when the > > markets are closed). Then for each of yours time series, you can check > > whether it has the missing timestamps. > > > > > > > > To generate the full set of timestamps, you can use R of course - POSIXlt > > and POSIXct are the classes to take a look at. They both support > > arithmetic like adding seconds and IMO can be used together with any time > > series. > > > > > > > > I also have a little C# program which generates timestamps in a given > > interval - let me know and I will send it to you. Then if you are using > > one of the time series packages in R (xts, zoo, etc) you can check whether > > a particular timestamp exists like: > > > > > > > > if(length(gspc["2009-12-05"]) != 0) --- this will be true if the time > > series gspc has the date. > > > > > > > > Regards, > > > > Ivan > > > >> Date: Sun, 13 Dec 2009 13:08:25 -0800 > >> From: shef...@googlemail.com > >> To: r-help@r-project.org > >> Subject: Re: [R] Need help to complete missing value (Date and Time) in > >> Sp500 Data > >> > >> > >> Hi uwe, > >> here the example: > >> 1) Dataset sp500 has values at 01.05.2008: > >> > >> 30.04.2008 21:56;1.385,63;1.385,63;1.385,14;1.385,14;0 > >> 30.04.2008 21:57;1.385,67;1.385,67;1.384,48;1.384,48;0 > >> 30.04.2008 21:58;1.384,74;1.384,91;1.384,27;1.384,91;0 > >> 30.04.2008 21:59;1.385,05;1.385,81;1.385,05;1.385,08;0 > >> 01.05.2008 15:30;1.385,97;1.385,97;1.384,14;1.384,54;0 > >> 01.05.2008 15:31;1.384,61;1.385,30;1.384,61;1.385,30;0 > >> 01.05.2008 15:32;1.385,03;1.385,54;1.385,03;1.385,54;0 > >> 01.05.2008 15:33;1.386,01;1.386,01;1.385,56;1.385,83;0 > >> 01.05.2008 15:34;1.385,61;1.385,61;1.385,00;1.385,00;0 > >> 01.05.2008 15:35;1.384,72;1.385,29;1.384,72;1.385,12;0 > >> 01.05.2008 15:36;1.385,26;1.385,26;1.384,47;1.384,48;0 > >> 01.05.2008 15:37;1.384,11;1.384,11;1.383,89;1.383,89;0 > >> 01.05.2008 15:38;1.383,63;1.383,75;1.383,33;1.383,75;0 > >> 01.05.2008 15:39;1.383,90;1.384,29;1.383,76;1.383,76;0 > >> 01.05.2008 15:40;1.383,66;1.383,66;1.383,07;1.383,08;0 > >> 01.05.2008 15:41;1.383,16;1.383,39;1.383,16;1.383,31;0 > >> 01.05.2008 15:42;1.383,70;1.383,94;1.383,69;1.383,69;0 > >> 01.05.2008 15:43;1.384,11;1.385,12;1.384,11;1.385,12;0 > >> 01.05.2008 15:44;1.385,26;1.385,72;1.385,26;1.385,72;0 > >> 01.05.2008 15:45;1.385,83;1.386,78;1.385,83;1.386,78;0 > >> 01.05.2008 15:46;1.386,89;1.387,09;1.386,89;1.386,96;0 > >> 01.05.2008 15:47;1.386,74;1.386,94;1.386,73;1.386,73;0 > >> > >> 2) but in the dataset dax (because the 1.5 is not work day in Germany ) > >> is > >> missing all the minute data. (there are some of these days the data > >> missing) > >> > >> 30.04.2008 17:28;6.947,29;6.947,69;6.944,64;6.946,21;547.527 > >> 30.04.2008 17:29;6.945,92;6.948,49;6.945,10;6.945,83;888.986 > >> 02.05.2008 09:00;6.982,06;6.982,06;6.980,25;6.980,88;1.202.110 > >> 02.05.2008 09:01;6.980,08;6.980,75;6.971,93;6.971,93;367.080 > >> 02.05.2008 09:02;6.972,88;7.031,30;6.972,88;7.026,16;2.097.588 > >> 02.05.2008 09:03;7.026,72;7.029,12;7.024,96;7.027,16;373.875 > >> 02.05.2008 09:04;7.027,06;7.029,64;7.024,17;7.026,32;421.565 > >> 02.05.2008 09:05;7.026,32;7.026,67;7.022,40;7.025,08;490.090 > >> 02.05.2008 09:06;7.024,21;7.025,31;7.021,45;7.021,70;500.031 > >> 02.05.2008 09:07;7.021,72;7.022,31;7.015,32;7.015,76;486.933 > >> 02.05.2008 09:08;7.017,90;7.022,94;7.017,90;7.022,23;461.801 > >> 02.05.2008 09:09;7.022,23;7.022,55;7.018,54;7.018,99;593.412 > >> > >> > >> > >> Uwe Ligges-3 wrote: > >> > > >> > > >> > > >> > Hamid wrote: > >> >> Hi Uwe, > >> >> yes you are right, but I just wanted to show the date format I use. > >> The > >> >> whole data is very huge (about 20000 rows). > >> >> > >> >> Nevertheless I like first to find the missing dates/Times. Then put 0. > >> I > >> >> know they are some different approach to impute missing data, but for > >> me > >> >> is > >> >> important to find a way to identify the missing gaps and then put the > >> >> values > >> >> (I think then it is not complicated to put other values instead of > >> zero). > >> >> Do you have any idea to find it out and put the values in ? > >> > > >> > > >> > > >> > Well, the problem is that I cannot imagine how your "gaps" look like, > >> > hence I asked for the example. Please provide an example (just a few > >> > rows) of the data how it looks like and then how you want it to be > >> > afterwards. > >> > > >> > That would be very helpful to allow readers of the list to respond. > >> > > >> > Uwe Ligges > >> > > >> > > >> > > >> >> Thanks in advance > >> >> Hamid > >> >> > >> >> Uwe Ligges-3 wrote: > >> >>> > >> >>> > >> >>> Hamid wrote: > >> >>>> Dear all, > >> >>>> here my problem my be somone can help to solve this. > >> >>>> > >> >>>> I have tow timeseries from different stock market with different > >> length > >> >>>> (diff ca. 4000 ) > >> >>>> Now I would to add the missing times of the one of this series with > >> >>>> proper > >> >>>> time (they are minute data) and set the value to 0 since I need to > >> have > >> >>>> the > >> >>>> same length for my calculation. > >> >>>> > >> >>>> I tried to use the seq in R and merge but without success because of > >> >>>> format > >> >>>> of the date. > >> >>>> My data of one vector i like to complete and extend to the length of > >> >>>> the > >> >>>> other vectors looks like: > >> >>> Well, this seems to be very complete, hence no idea what you want to > >> >>> add, please specify a reproducible example. > >> >>> > >> >>> Uwe Ligges > >> >>> > >> >>> > >> >>> > >> >>>> Date;open;hight;low;close;Volume > >> >>>> 02.04.2008 09:00;6.749,24;6.755,55;6.746,89;6.754,11;0 > >> >>>> 02.04.2008 09:01;6.754,70;6.754,70;6.748,13;6.749,55;0 > >> >>>> 02.04.2008 09:02;6.749,36;6.757,00;6.745,50;6.749,38;0 > >> >>>> 02.04.2008 09:03;6.748,08;6.753,84;6.748,08;6.753,84;0 > >> >>>> 02.04.2008 09:04;6.753,79;6.755,59;6.752,18;6.752,41;0 > >> >>>> 02.04.2008 09:05;6.753,23;6.753,23;6.748,17;6.748,47;0 > >> >>>> 02.04.2008 09:06;6.749,43;6.750,62;6.748,22;6.748,26;0 > >> >>>> 02.04.2008 09:07;6.748,26;6.748,89;6.745,54;6.745,54;0 > >> >>>> 02.04.2008 09:08;6.745,49;6.746,58;6.744,82;6.745,58;0 > >> >>>> 02.04.2008 09:09;6.745,62;6.745,98;6.741,47;6.741,55;0 > >> >>>> 02.04.2008 09:10;6.741,58;6.741,73;6.737,21;6.739,85;0 > >> >>>> 02.04.2008 09:11;6.739,10;6.742,81;6.738,24;6.742,53;0 > >> >>>> 02.04.2008 09:12;6.742,32;6.742,80;6.740,42;6.741,81;0 > >> >>>> 02.04.2008 09:13;6.741,84;6.744,78;6.741,84;6.744,60;0 > >> >>>> 02.04.2008 09:14;6.744,60;6.744,60;6.740,54;6.740,54;0 > >> >>>> 02.04.2008 09:15;6.740,45;6.740,67;6.736,32;6.737,68;0 > >> >>>> 02.04.2008 09:16;6.737,72;6.740,68;6.737,45;6.740,11;0 > >> >>>> 02.04.2008 09:17;6.740,04;6.746,34;6.740,04;6.746,34;0 > >> >>>> 02.04.2008 09:18;6.746,21;6.750,64;6.746,21;6.749,99;0 > >> >>>> 02.04.2008 09:19;6.750,61;6.752,95;6.749,07;6.750,69;0 > >> >>>> 02.04.2008 09:20;6.750,82;6.751,01;6.748,20;6.750,74;0 > >> >>>> 02.04.2008 09:21;6.750,57;6.752,98;6.748,62;6.752,98;0 > >> >>>> 02.04.2008 09:22;6.752,74;6.756,24;6.752,74;6.753,84;0 > >> >>>> 02.04.2008 09:23;6.753,90;6.755,51;6.752,70;6.753,05;0 > >> >>>> > >> >>>> Thanks in advance for any help! > >> >>>> H. > >> >>> ______________________________________________ > >> >>> 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. > >> >>> > >> >>> > >> >> > >> > > >> > ______________________________________________ > >> > 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. > >> > > >> > > >> > >> -- > >> View this message in context: > >> http://n4.nabble.com/Need-help-to-complete-missing-value-Date-and-Time-in-Sp500-Data-tp962671p963123.html > >> Sent from the R help mailing list archive at Nabble.com. > >> > >> ______________________________________________ > >> 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. > > > > > > _________________________________________________________________ > > > > > > [[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. > > > > > > -- > View this message in context: > http://n4.nabble.com/Need-help-to-complete-missing-value-Date-and-Time-in-Sp500-Data-tp962671p963182.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. _________________________________________________________________ ail you. [[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.
