[R] export dataframe's column classes to a list
ashenkin at ufl.edu
Wed May 19 23:00:16 CEST 2010
It does indeed! thank you very much, and thanks to mark leeds as well,
who emailed me off list with a similar solution.
On 5/19/2010 3:49 PM, Peter Alspach wrote:
> Tena koe Allie
> sapply(myframe, class)
> do what you want?
> Peter Alspach
>> -----Original Message-----
>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
>> project.org] On Behalf Of Alexander Shenkin
>> Sent: Thursday, 20 May 2010 8:19 a.m.
>> To: r-help at r-project.org
>> Subject: [R] export dataframe's column classes to a list
>> Hi Folks,
>> I want to export a dataframe's column classes to a list so that I can
>> reinstantiate the dataframe from a CSV file in the future. (I know
>> about save(), which I'm using in addition to this).
>> what I want to do is the following:
>> col_classes = get_col_classes(myframe);
>> write.csv(col_classes, "column_classes")
>> ... time passes, R gets closed, etc ...
>> col_classes = read.csv("column_classes")
>> new_myframe = read.csv("myfile.csv", colClasses = col_classes)
>> My question is how to construct the "get_col_classes()" function
>> Any thoughts are greatly appreciated!
>> Alexander Shenkin
>> PhD Candidate
>> School of Natural Resources and Environment
>> University of Florida
>> R-help at r-project.org mailing list
>> PLEASE do read the posting guide http://www.R-project.org/posting-
>> and provide commented, minimal, self-contained, reproducible code.
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