What do you mean by older data.table version, which one? Can you
upgrade to v1.9.2?
> Therefore this column gets bumped and the program stops.
It shouldn't stop. It should bump the column and continue. That's what
happens for me. Could be a bug then, which is why it's confusing
talking about an older version of data.table. Thinking about it, maybe
those bump warning messages should be downgraded to verbose=TRUE
output. It might be stopping if you've set options(warn=2).
Matt
On 14/03/14 12:01, Simon Zehnder wrote:
My idea below made everything work … problem solved.
Best
Simon
On 13 Mar 2014, at 09:18, Simon Zehnder <[email protected]> wrote:
Ok, what I found out so far is the following:
Column 9 (containing characters in the .csv-file) is read first as LGL (logical
I think) because the character in the first rows of this column is just ’T’
(and ‘fread' reads T/True/TRUE as TRUE). After some lines there comes a ‘C’ and
now this column cannot be anymore logical (LGL) but has to be character.
Therefore this column gets bumped and the program stops.
As the ordering of columns can change in my package I need to tell ‘fread',
that it should not consider LGL at all - is that possible? I would like to
avoid to bother the user by asking him to provide colClasses.
My data sample is always the TRACE data but I cannot know what variables of the
TRACE data a user has retrieved. So my only idea to avoid the above mentioned
error in my fread would be:
1. Read column names via ’scan’.
2. Check what variables are in and then choose via key/value pairs the
appropriate colClasses and use them in ‘fread’.
Any other suggestions?
Best
Simon
On 12 Mar 2014, at 20:28, Simon Zehnder <[email protected]> wrote:
I am having a weird error in a package I wrote some time ago with an older
data.table version. ‘fread’ gives:
Internal error: attempt to bump from type 0 to type 1. Please report to
datatable-help
The data is the same that I read in before. Any ideas?
Best
Simon
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