On 18/05/10 00:04, John Owens wrote:
> Laurent<lgautier<at> gmail.com> writes:
>>> print [x for x in df.rx2('a')] # question 1
>>>
>>> Question 1: What I want is to see three text strings (the dates
>>> starting with "Mar"). Instead, what I see is [1, 2, 3]. I can't
>>> manipulate [1, 2, 3]. How do I get the text strings back out
>>> instead of [1, 2, 3]? (And what are [1, 2, 3] - a factorvector
>>> kind of representation?)
>>
>> Yes. By default R converts vectors of strings into factors when
>> constructing a data.frame. The way to avoid it is to wrap the vector
>> into a call to "base.I()" (not my choice, that's the way it is in R)
>
> What if we constructed the data.frame using from_csvfile?
Try:
DataFrame.from_csv("what/ever", as_is = True)
[ .from_csv() is mostly a wrapper for R's base::read.csv() ]
> If I'm making
> a df from vectors, I can do this as I create the df, but if I'm reading
> it from a csv file, it seems harder. Unless you mean call it when you
> get it out of the dataframe? This doesn't work either:
>
> print [x for x in base.I(df.rx2('a'))] # same result
>
> JDO
>
>
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