On May 3, 2010, at 7:21 PM, vincent.deluard wrote:
Hi John,
Thanks for responding so quickly.
So I tried:
Test2[1:3,1:3])
'data.frame': 3 obs. of 3 variables:
$ Date : Factor w/ 2480 levels "A UN Equity",..: 1033 2396 613
$ X4.20.2010: Factor w/ 1994 levels "0.24","0.33",..: 953 497 1814
$ X4.19.2010: Factor w/ 1957 levels "0.24","0.33",..: 933 486 1779
But I am not sure how to interpret it.
The information is now in the levels vector.
The stringAsFactors = False option did not work either.
False <> FALSE
--
David.
Test2 <- read.table('Test2.csv', sep=",", header=TRUE,
stringAsFactors=FALSE)
Error in read.table("Test2.csv", sep = ",", header = TRUE,
stringAsFactors = FALSE) :
unused argument(s) (stringAsFactors = FALSE)
If you want to look at it, I attach a section of my data.
Right now if I type:
Test2[2,2]+1
Which should return 19.72
Not if it's a factor.
I get
[1] NA
Warning message:
In Ops.factor(Test2[2, 2], 1) : + not meaningful for factors
Your help is SO appreciated!
--------------------------------------------
Vincent Deluard
<mailto:vincent.delu...@trimtabs.com> vincent.delu...@trimtabs.com
Global Equity Strategist, CFA Charter Award Pending
TrimTabs Investment Research
40 Wall Street, 28th Floor
New York, NY 10005
Phone: (+1) 646-512-5616
From: John Kane-2 [via R] [mailto:ml-node+2124731-1168690456-90...@n4.nabble.com
]
Sent: Monday, May 03, 2010 6:51 PM
To: vincent.deluard
Subject: Re: / Operator not meaningful for factors
I think that you are correct. R has the annoying habit of
converting character data to factors when you don't want it
to while it is importing data. This is because the in the option
"stringsAsFactors" is set to TRUE for some weird
historical reasons.
Try the command str(insert name of data) and see what happens. It
should show you which columns of data are being
treated as factors.
You can convert the back to character or to numeric. See the FAQ
Part 7 "How do I convert factors to numeric? " or you
can use the String as options command in the read.table to FALSE
Something like this should work, I think, but it's not tested
read.table("C:/rdata/trees.csv", stringsAsFactors=FALSE)
--- On Mon, 5/3/10, vincent.deluard <[hidden email]> wrote:
From: vincent.deluard <[hidden email]>
Subject: Re: [R] / Operator not meaningful for factors
To: [hidden email]
Received: Monday, May 3, 2010, 6:22 PM
Hi there,
This will sound very stupid because I just started using R
but I see you had
similar problems.
I just loaded a very large dataset (2950*6602) from csv
into R. The format
is ticker=row, date=column.
Every time I want to compute basic operations, R returns
"In Ops.factor: not
meaningful for factors"
I believe it is because R does not read the data as numbers
but I am not
sure. Can anybody help?
Thanks!
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