[R] Odp: Data frame query

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 05.03.2010 13:40:54:

> 
> I have created a large dataframe (d) by getting data from file using
> read.table
> 
> I now have 79 columns and 3 million rows. How can I plot the 6th column? 
I
> tried plot(d[,6]) but it doesn't look right. When I try to do just d[,6] 
the
> console gets some odd "levels" message I don't understand

See
?factor

You shall check your input process. You probably have imported some or all 
your data as factors. Try 

levels(d[,6]) to see if there is some non numeric value in it. 

>From your second query I suppose you have included heading into your data.

I recommend to try to use your read.table with header=TRUE.

Regards
Petr



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