how to pass multiple pattern varibles to grep()
Hello, there,
My patterns are defined by variables, for example:z="h"v="x"
I have a vector:
a=c("th","mx","t")
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?
Thanks.
Ace
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))$x)? ?[1] 512? ?> args(density.default)? ?function (x, bw = "nrd0", adjust = 1, kernel = c("gaussian",?? ? ? ?"epanechnikov", "rectangular", "triangular", "biweight",?? ? ? ?"cosine", "optcosine"), weights = NULL, window = kernel,?? ? ? ?width, give.Rkern = FALSE, n = 512, from, to, cut = 3, na.rm = FALSE,?? ? ? ?...)? ?NULL? ?> ?density # or ?density.default, should also tell you about its meaning
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Tue, Mar 17, 2015 at 7:02 PM, Fix Ace <acefix at rocketmail.com> wrote:
Thank you for the email. What is the default "n"? Thanks!
On Tuesday, March 17, 2015 4:06 PM, William Dunlap <wdunlap at tibco.com> wrote:
Increasing the value of 'n' given to density will give an estimate at more points so it will look smoother.? Try n=2^18. Bill Dunlap TIBCO Software wdunlap tibco.com
On Tue, Mar 17, 2015 at 12:06 PM, Fix Ace <acefix at rocketmail.com> wrote:
?I have a dataset with 6187 elements, ranged from 3 to 104028. When I tried to examine only small range of data, I found that the plot was not smooth (as shown below): plot(density(test$V2), xlim=c(0,1000)) ?Is there away to make it smoother? Thanks a lot!! ? ? ? ______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.