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median_a
2013 Jun 26
1
Error when using median as aggregation function in dcast
...m trying to calculated various summary statistics using the dcast
function
of reshape2. This works perfectly for getting the mean, sum, length, sd. But
when I want to calculate the median I get an error. I tried it with and
without removing
NAs:
my_median <- function(x) median(x, na.rm = FALSE)
median_df <- dcast(patch_stats_dfm,formula=species~input+barriers,my_median)
Error in vapply(indices, fun, .default) : values must be type 'integer',
but FUN(X[[1]]) result is type 'double'
What does this error mean and what is causing the error, resp. how can I
solve the problem and
ge...