Dear all,
I guess I found a bug in data.table. I have a data frame with complex numbers
which I'd like to convert to a data table for aggregation. Most things work,
for instance:
> > head(d)
> Fz Cz Pz item
> 1: 0.002+0i 0.005+0i 0.054+0i 182
> 2: 1.567+0i 2.263+0i 1.547+0i 182
> 3: 0.314+0i 1.159+0i 3.841+0i 182
> 4: 0.507+0i 3.026+0i 6.783+0i 182
> 5: 2.086+0i 4.051+0i 1.159+0i 182
> 6: 0.344+0i 0.033+0i 2.282+0i 182
The data type is also ok:
> > str(d)
> Classes ‘data.table’ and 'data.frame': 128256 obs. of 4 variables:
> $ Fz : cplx 0.002+0i 1.567+0i 0.314+0i ...
> $ Cz : cplx 0.005+0i 2.263+0i 1.159+0i ...
> $ Pz : cplx 0.054+0i 1.547+0i 3.841+0i ...
> $ item: int 182 182 182 182 182 182 182 182 182 182 ...
> - attr(*, ".internal.selfref")=<externalptr>
When I just call the object, I don't get head and tail as usually but the
following message:
> > d
> Error in rbindlist(allargs) : Unsupported column type 'complex'
and when I want to set a key column for merging, I get:
> > setkeyv(d, c("item"))
> Error in setkeyv(d, c("item")) :
> don't know how to reorder type 'complex' of column 1. Please send this
> message to datatable-help
So that's what I did. Am I doing something wrong here or is this just a bug?
Best,
Paul
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