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col_factor() that automatically figures out levels #497

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tvedebrink opened this issue Aug 1, 2016 · 1 comment
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col_factor() that automatically figures out levels #497

tvedebrink opened this issue Aug 1, 2016 · 1 comment
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feature a feature request or enhancement

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@tvedebrink
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tvedebrink commented Aug 1, 2016 •
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A nice feature to the col_factor() function in col_types would be to allow empty arguments.
This should be treated similar to data$variable <- factor(data$variable) on character variables after using read_csv. That is, col_factor() would be stringsAsFactors=TRUE for the specific variables/columns.
@hadley hadley added collector feature a feature request or enhancement labels Dec 22, 2016
@jimhester jimhester mentioned this issue Feb 7, 2017
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jimhester added a commit that referenced this issue Feb 9, 2017
@jimhester
parse_factor() now can accept levels = NULL
608510f 
This allows one to generate factor levels based on the data

Fixes #497
jimhester added a commit that referenced this issue Feb 22, 2017
@jimhester
parse_factor() now can accept levels = NULL
f909140 
This allows one to generate factor levels based on the data

Fixes #497
@tvedebrink
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tvedebrink commented Mar 14, 2017 •
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Perfect - works like a charm
read_csv("x,y\n1,A\n2,B", col_types = list(col_double(),col_factor(NULL)))

@jennybc jennybc mentioned this issue Mar 8, 2018
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@brianstamper brianstamper mentioned this issue Jun 5, 2018
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