[R] density plot not smooth
William Dunlap
wdunlap at tibco.com
Wed Mar 18 03:26:18 CET 2015
Fix Ace wrote
What is the default "n"?
512:
> length(density(rnorm(10^6))$x)
[1] 512
> args(density.default)
function (x, bw = "nrd0", adjust = 1, kernel = c("gaussian",
"epanechnikov", "rectangular", "triangular", "biweight",
"cosine", "optcosine"), weights = NULL, window = kernel,
width, give.Rkern = FALSE, n = 512, from, to, cut = 3, na.rm =
FALSE,
...)
NULL
> ?density # or ?density.default, should also tell you about its meaning
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Tue, Mar 17, 2015 at 7:02 PM, Fix Ace <acefix at rocketmail.com> wrote:
> Thank you for the email.
>
> What is the default "n"?
>
> Thanks!
>
>
>
> On Tuesday, March 17, 2015 4:06 PM, William Dunlap <wdunlap at tibco.com>
> wrote:
>
>
> Increasing the value of 'n' given to density will give an estimate at more
> points so it will look smoother. Try n=2^18.
>
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
>
> On Tue, Mar 17, 2015 at 12:06 PM, Fix Ace <acefix at rocketmail.com> wrote:
>
>
>
> I have a dataset with 6187 elements, ranged from 3 to 104028. When I
> tried to examine only small range of data, I found that the plot was not
> smooth (as shown below):
> plot(density(test$V2), xlim=c(0,1000))
>
>
> Is there away to make it smoother?
> Thanks a lot!!
>
>
>
>
>
>
>
>
>
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