[R] Read fst files

[Jeff Reichman]

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 ....?????

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

Jeff



-----Original Message-----
From: Duncan Murdoch <murdoch.duncan using gmail.com> 
Sent: Wednesday, June 9, 2021 7:27 AM
To: reichmanj using sbcglobal.net; 'Eric Berger' <ericjberger using gmail.com>
Cc: 'R mailing list' <r-help using r-project.org>
Subject: Re: [R] Read fst files

It looks as though read_fst wants a filename, not a connection.

You should do it in two steps:

  unzip("Dataset.zip", files = "myFile.fst")
  myObject <- read_fst("myFile.fst")

This is obviously untested; you didn't even say what package read_fst() comes from.

Duncan Murdoch

On 09/06/2021 8:18 a.m., Jeff Reichman wrote:
> Eric
> 
>   
> 
> Typo on my point.
> 
>   
> 
> setwd("C:/Users/reichmaj/Documents/My_Reference_Library /Regression")
> 
> myObject <- read_fst(unz("Dataset.zip", filename = "myFile.fst")) # 
> read fst file
> 
>   
> 
> Error in path.expand(path) : invalid 'path' argument
> 
>   
> 
> So then I tried
> 
>   
> 
> myObject <- 
> read_fst(unz("C:/Users/reichmaj/Documents/My_Reference_Library 
> /Regression /Dataset.zip", filename = "myFile.fst"))
> 
>   
> 
> Error in path.expand(path) : invalid 'path' argument
> 
>   
> 
> Error in the path??
> 
>   
> 
> Because this works just fine
> 
>   
> 
> myObject <- 
> read.csv(unz("C:/Users/reichmaj/Documents/My_Reference_Library 
> /Regression /Dataset.zip", filename = "myFile.csv"))
> 
>   
> 
> My only though is I can’t use the two function s together when dealing with fst files ??
> 
>   
> 
> From: Eric Berger <ericjberger using gmail.com>
> Sent: Wednesday, June 9, 2021 3:50 AM
> To: reichmanj using sbcglobal.net
> Cc: R mailing list <r-help using r-project.org>
> Subject: Re: [R] Read fst files
> 
>   
> 
> You are missing the second closing parenthesis. This is what the error message is telling you.
> 
>   
> 
>   
> 
> On Wed, Jun 9, 2021 at 2:44 AM Jeff Reichman <reichmanj using sbcglobal.net <mailto:reichmanj using sbcglobal.net> > wrote:
> 
> R-Help Forum
> 
> 
> 
> Anyone know why the following line of code would error out:  myObject 
> <- read_fst(unz("Dataset.zip", filename = "filename.fst"))
> 
> 
> 
> Error: Incomplete expression: filename <- read_fst(unz("Dataset.zip", 
> filename = "filename.fst")
> 
> 
> 
> I often use similar code with *.csv files in a zipped folder. For example:
> myObject <- read.csv(unz("Dataset.zip", filename = "filename.csv")), 
> which works just fine.
> 
> 
> 
> Jeff Reichman
> 
> 
> 
> 
>          [[alternative HTML version deleted]]
> 
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