On Wed, 9 Jul 2014 04:47:39 PM Janet Choate wrote:
> Hi R community,
> i created a function (mkdate) as follows:
>
> mkdate = function(x) {
> x$date = as.Date(paste(x$year, x$month, x$day, sep="-"))
> x$wy = ifelse(x$month >=10, x$year+1, x$year)
> x$yd = as.integer(format(as.Date(x$date), format="%j"))
> x$wyd = cal.wyd(x)
> x
> }
>
> the function results in adding the new columns date, wy, yd, and
wyd to the
> table i apply it to.
> this has always worked in R version 2.14.2.
> however, in R version 3.1.0 - instead of my mkdate function adding
those
> columns to my existing table, it just overwrites my table and leaves
me
> with just a list of the last variable created by my mkdate function. so
i
> end up with just a list of numbers representing wyd, and lose all the
data
> in my original table.
>
> does anyone know what would now be causing this to occur, and
what i need
> to do to make my function work properly again?
>
> thank you for any assistance,
> Janet
>
> [[alternative HTML version deleted]]
>
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code.
Hi Janet,
It looks to me as though x should be at least a three column list
containing a year, month and day in numeric format. You then add
four other fields to it and return the resulting (at least) seven column
list. What you may have been doing was to pass your entire data
frame (?) to the function with one or more incomplete rows,
whereupon the function would calculate the four fields for all the rows
and fill in the incomplete rows. This is not a very efficient way to do this
and you should probably consider just passing the new values and
appending the object returned to your data frame.
Jim
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