On 21/07/2009 6:09 AM, leo mueller wrote:
hi all,
i have a simple question. instead of defining my measurements in a
static way like ...
x <- c(-0.475, -1.553, -0.434, -1.019, 0.395)
... i'd like them to be read from a file ...
x <- read.table("07a673ac0cb1f7f8fa293860566f633c/1/raw0.txt", header=FALSE)
d1 <- density(x, kernel = "gaussian")
with a formatting that looks like:
4.2840000000e-01
6.7583333333e-01
8.2920000000e-01
7.8566666667e-01
6.6336666667e-01
5.4080000000e-01
4.7283333333e-01
4.3770000000e-01
4.3743333333e-01
4.1026666667e-01
3.6283333333e-01
3.2770000000e-01
4.9096666667e-01
[...]
R quits and says:
d1 <- density(x, kernel = "gaussian")
Error in density.default(x, kernel = "gaussian") :
argument 'x' must be numeric
Calls: density -> density.default
Execution halted
is there any possibility to convert this / make this work?
read.table returns a dataframe, i.e. a list of vectors. density wants a
vector. So you will probably get what you want using
d1 <- density(x[[1]], kernel="gaussian")
You can use names(x) to find the name of the 1st column for a nicer
syntax; it is probably V1 (for "variable 1"), so you could do
y <- x$V1
density(y, ...)
Duncan Murdoch
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