Bill
So I understand that’s just unzipping the file to a temporary dir which then would allow read_fst to access the file directly . Jeff From: Bill Dunlap <williamwdun...@gmail.com> Sent: Wednesday, June 9, 2021 1:43 PM To: reichm...@sbcglobal.net Cc: Jan van der Laan <rh...@eoos.dds.nl>; r-help@r-project.org Subject: Re: [R] Read fst files Try using unzip(zipfile, files="desiredFile", exdir=tf<-tempfile()), not unz(zipfile, "desiredFile"), to copy the desired file from the zip file to a temporary location and use read_fst(tf) to read the desired file. -Bill On Wed, Jun 9, 2021 at 11:27 AM Jeff Reichman <reichm...@sbcglobal.net <mailto:reichm...@sbcglobal.net> > wrote: Jan Makes sense. Its just that I often receive large zip files that contain a variety of file types. Jef -----Original Message----- From: R-help <r-help-boun...@r-project.org <mailto:r-help-boun...@r-project.org> > On Behalf Of Jan van der Laan Sent: Wednesday, June 9, 2021 12:56 PM To: r-help@r-project.org <mailto:r-help@r-project.org> Subject: Re: [R] Read fst files read_fst is from the package fst. The fileformat fst uses is a binary format designed to be fast readable. It is a column oriented format and compressed. So, to be able to work fst needs access to the file itself and wont accept a file connection as functions like read.table an variants accept. Also, because it is a binary compressed format using a compression method that is fast to read, compressing also to zip seems to defeat the purpose of fst. HTH, Jan On 09-06-2021 15:28, Duncan Murdoch wrote: > On 09/06/2021 9:12 a.m., Jeff Reichman wrote: >> Duncan >> >> Yea that will work. It appears to be related to setting my working >> dir, for what ever reason neither seem to work >> (1) knitr::opts_knit$set(root.dir >> ="~/My_Reference_Library/Regression") # from R Notebook or >> (2) >> setwd("C:/Users/reichmaj/Documents/My_Reference_Library/Regression") # >> from R chunk >> >> So it appears I can either (as you suggested) use two steps or combine >> but I need to enter the full path. Why other file types don't seem to >> need the full path ....????? > > You need to read the documentation for read_fst() to find what it needs. > If it doesn't explain this, then you should report the issue to its > author. > >> >> myObject <- >> read_fst(unz("C:/Users/reichmaj/Documents/My_Reference_Library/Regression/Datasest.zip", >> >> filename = "myFile.fst")) >> >> Thank you. I guess just one of those R things > > No, it's a read_fst() thing. > > Duncan Murdoch > > ______________________________________________ > 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. ______________________________________________ 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. ______________________________________________ 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.
