[R] Read fst files

[Duncan Murdoch]

On 09/06/2021 1:55 p.m., Jan van der Laan wrote:
> 
> 
> 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.

Thanks for the info.  I think it is possible to handle such a file in a 
binary connection, but doing that in C/C++ would be kind of horrible, so 
I can understand your choice.

Duncan Murdoch

> 
> 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
>>
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> 
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
>