[R] how to pass multiple pattern varibles to grep()
acefix at rocketmail.com
Thu Sep 22 23:02:20 CEST 2016
My patterns are defined by variables, for example:z="h"v="x"
I have a vector:
I would like to find elements in vector a that contain either "h", or "x"
grep("h|x", a) apparently works. However, when I tried: grep(z|v,a), it did not work. Can anyone help how to handle such situation?
On Wednesday, March 18, 2015 5:52 PM, Fix Ace <acefix at rocketmail.com> wrote:
Thank you very much!
I do need to learn more about R!!
On Tuesday, March 17, 2015 9:26 PM, William Dunlap <wdunlap at tibco.com> wrote:
Fix Ace wrote What is the default "n"?
512: > length(density(rnorm(10^6))$x)  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
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"?
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.
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):
Is there away to make it smoother?
Thanks a lot!!
R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
More information about the R-help