Re: [R] timeDate package: Read dates from xls or txt
If you read the documentation for that package you will find that the answer is no, for the simple reason that it doesn't do input or output. It does help you with conversions between POSIXt types, and can help figure out which days are holidays or weekends, but you need the date in character format to start. For reading in CSV data I use as.is=TRUE or stringsAsFactors=FALSE in my call to read.csv. For reading xls files I have had difficulties, which is why I prefer to export Excel data to CSV before reading it into R. One XLConnect bug workaround I have used is to convert the timestamp column into character using as.character with specified format and then back using as.POSIXct and a specified timezone, but it was borne of desperation and may not always be necessary or even sufficient. Please post using plain text rather than HTML format on this list. Only you can prevent your postings from being garbled. --- Jeff NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --- Sent from my phone. Please excuse my brevity. On September 29, 2014 2:47:01 AM PDT, jpm miao miao...@gmail.com wrote: Hi, timeDate package create a date vector like this: Dates - c(1989-09-28,2001-01-15,2004-08-30,1990-02-09) I have a date whose size is large. Could this package read the dates from xls or txt files? Could we convert the read vector (e.g., I usually use XLConnect to read xls files) to the date? Thanks, Miao [[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. __ 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.
Re: [R] timeDate package: Read dates from xls or txt
Thanks. Could timeDate object be transformed to/from zoo or xts? 2014-09-30 9:01 GMT+08:00 Jeff Newmiller jdnew...@dcn.davis.ca.us: If you read the documentation for that package you will find that the answer is no, for the simple reason that it doesn't do input or output. It does help you with conversions between POSIXt types, and can help figure out which days are holidays or weekends, but you need the date in character format to start. For reading in CSV data I use as.is=TRUE or stringsAsFactors=FALSE in my call to read.csv. For reading xls files I have had difficulties, which is why I prefer to export Excel data to CSV before reading it into R. One XLConnect bug workaround I have used is to convert the timestamp column into character using as.character with specified format and then back using as.POSIXct and a specified timezone, but it was borne of desperation and may not always be necessary or even sufficient. Please post using plain text rather than HTML format on this list. Only you can prevent your postings from being garbled. --- Jeff NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --- Sent from my phone. Please excuse my brevity. On September 29, 2014 2:47:01 AM PDT, jpm miao miao...@gmail.com wrote: Hi, timeDate package create a date vector like this: Dates - c(1989-09-28,2001-01-15,2004-08-30,1990-02-09) I have a date whose size is large. Could this package read the dates from xls or txt files? Could we convert the read vector (e.g., I usually use XLConnect to read xls files) to the date? Thanks, Miao [[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. [[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.
Re: [R] timeDate package: Read dates from xls or txt
Your questions still don't make sense. Can you use a car to make lunch? You could use it to drive to the store and get ingredients for lunch, but it isn't a very useful question. The timeDate package is a package of useful functions, not a class of data. Re-read my description below, or better yet read the documentation for that package. Zoo is both a package and a class of data defined in that package, but it allows you to choose which kind of time object you want to use as the index of your time series. POSIXct is one type that zoo can use, and the functions in the timeDate package might even be helpful to you in getting that index vector ready to give to the zoo function... or not. Depends what you need to do to your time data to make it useful. --- Jeff NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --- Sent from my phone. Please excuse my brevity. On September 29, 2014 6:10:01 PM PDT, jpm miao miao...@gmail.com wrote: Thanks. Could timeDate object be transformed to/from zoo or xts? 2014-09-30 9:01 GMT+08:00 Jeff Newmiller jdnew...@dcn.davis.ca.us: If you read the documentation for that package you will find that the answer is no, for the simple reason that it doesn't do input or output. It does help you with conversions between POSIXt types, and can help figure out which days are holidays or weekends, but you need the date in character format to start. For reading in CSV data I use as.is=TRUE or stringsAsFactors=FALSE in my call to read.csv. For reading xls files I have had difficulties, which is why I prefer to export Excel data to CSV before reading it into R. One XLConnect bug workaround I have used is to convert the timestamp column into character using as.character with specified format and then back using as.POSIXct and a specified timezone, but it was borne of desperation and may not always be necessary or even sufficient. Please post using plain text rather than HTML format on this list. Only you can prevent your postings from being garbled. --- Jeff NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --- Sent from my phone. Please excuse my brevity. On September 29, 2014 2:47:01 AM PDT, jpm miao miao...@gmail.com wrote: Hi, timeDate package create a date vector like this: Dates - c(1989-09-28,2001-01-15,2004-08-30,1990-02-09) I have a date whose size is large. Could this package read the dates from xls or txt files? Could we convert the read vector (e.g., I usually use XLConnect to read xls files) to the date? Thanks, Miao [[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. __ 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.
