search for: colconvertfn

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2019 Mar 22
3
[PATCH 1/2] readtable: add hook for type conversions per column
...parameter to readtable. The function is called for every column. The goal is to allow specific (non-standard) type conversions depending on the input. When the parameter is not given, or the function returns NULL, the legacy default applies. The colClasses parameter still takes precedence, i.e. the colConvertFn only applies to the default conversions. This allows to properly load a .csv with timestamps expressed in the (quite common) %d/%m/%y %H:%M format, which was impossible since overruling as.POSIXlt makes a copy in the users namespace, and read.table would still take the base version of as.POSIXlt. R...