search for: rhotrading

...ave functions for converting COM datetime <-> chron datetimethat work "safely"? David L. Reiner > -----Original Message----- > From: Gabor Grothendieck [mailto:ggrothendieck@gmail.com] > Sent: Tuesday, November 15, 2005 5:34 PM > To: David Reiner <davidr@rhotrading.com> > Cc: r-help@stat.math.ethz.ch > Subject: [SPAM] - Re: [R] origin and "origin<-" functions on chron - > Bayesian Filter detected spam > > chron has a namespace so try this: > > chron:::origin > getAnywhere("origin<-") >...

Could someone please suggest a more clever solution to the following problem than my loop below? Given X a 2xN matrix X, and I a k-subset of N, Generate the (2^k)xN matrix Y with columns not in I all zero and the other columns with all choices of an entry from the first or second row of X. For example, with X <- matrix(1:8, nrow=2) I <- c(1,3) X is 1 3 5 7 2 4 6 8 and Y should be 1 0 5

?unique says Value: An object of the same type of 'x'. but if an element is equal to one with a smaller index, it is removed. However, I need to keep the one with the LARGEST index. Can someone please show me the light? I thought about reversing the row order twice, but I couldn't get it to work right (My data frame has 125000 rows and 7 columns, and I'm

...the history buffer. I'm trying to avoid cutting and pasting the results into a comment. Thanks for any more help on this, David -----Original Message----- From: partha_bagchi at hgsi.com [mailto:partha_bagchi at hgsi.com] Sent: Monday, November 08, 2004 4:07 PM To: David Reiner <davidr at rhotrading.com> Cc: r-help at stat.math.ethz.ch Subject: Re: [R] can one evaluate an expression in a comment? (or insert resultsinto history?) Have you perchance looked at ?paste For example: > paste("The current time is ", date()) [1] "The current time is Mon Nov 08 17:06:25 2004&quot...

I'm using v 1.9.1 under Windoz XP. Can I do the equivalent of "ls -l" on my R objects? R's "ls()" lists only the names. Thanks! David L. Reiner Rho Trading 440 S. LaSalle St -- Suite 620 Chicago IL 60605 312-362-4963 (voice) 312-362-4941 (fax) [[alternative HTML version deleted]]

...cells 480150 12.9 818163 21.9 818163 21.9 Vcells 797171 6.1 1445757 11.1 1441593 11.0 > dat [DATETIME] PX_LAST day day (09/17/07 19:43:45) NA I don't get the data...but the same statement tried with ticker works. So, any problem with ISIN's? -----Original Message----- From: davidr at rhotrading.com [mailto:davidr at rhotrading.com] Sent: Friday, September 14, 2007 10:24 PM To: Shubha Vishwanath Karanth; r-help at stat.math.ethz.ch Subject: RE: [R] ISIN numbers into Bloomberg tickers You can try > blpGetData(conn, "US912828HA15 Govt", c("ticker", "cpn&qu...

I'm trying to use/modify some code I found (at Omegahat, but I've seem similar usage elsewhere.) It contains the lines: if(any(origin(chronDate)!=orig)) origin(chronDate) <- orig Let's say: > require("chron") [1] TRUE > chronDate <- chron("11/15/2005", format="m/d/y", origin.=c(12,31,1899)) > orig <- c(month=12, day=31,

I'm having trouble with the standard deviation distribution as shown on http://mathworld.wolfram.com/StandardDeviationDistribution.html . (Eric Weisstein references Kenney and Keeping 1951, which I can't check.) I believe the graphs they show, but when I code the function in R, according to the listed formula, I get very different graphs. Would someone please point out my error or tell

This is a windows-specific question. After generating a plot, I can print from scripts or the command line with > dev.print(win.print,printer="local windows printer name") I would like to print in landscape mode. From the menus, I can accomplish this by changing the properties of the printer before clicking "print". However, I tried adding

sqldf is an R package for running SQL select statements on one or more R data frames. It is optimized for convenience making it useful for ad hoc queries against R data frames. Given an SQL select statement whose tables are the names of R data frames it: - sets up the database (by default it transparently sets up an in memory SQLite database using RSQLite; however, MySQL via RMySQL, can be

sqldf is an R package for running SQL select statements on one or more R data frames. It is optimized for convenience making it useful for ad hoc queries against R data frames. Given an SQL select statement whose tables are the names of R data frames it: - sets up the database (by default it transparently sets up an in memory SQLite database using RSQLite; however, MySQL via RMySQL, can be

I'm having trouble reshaping a data.frame from long to wide. (I think that's the right terminology; feel free to educate me.) I've looked at the reshape function and package and plyr package, but I can't quite figure out how to do this after a dozen variations. I have a data.frame with more levels than this, but similar to: > tst K1 K2 K3 V1 V2 V3 1 10 D a 0.08 99

I'm trying to plot Venn diagrams with more than 3 sets (5 actually) in order to describe graphically the genetic variation between populations. I tried the limma library but realised it can only plot 3 sets. Is there any solution? Of course I could plot the chart manually but it'll take too long (have other datasets)..... One of my dataset is given below. THanks for any advice. j

Hi I have been wondering if there one can speed up calculating small powers of numbers such as x^8 using multiplication. In addition, one can be a bit clever and calculate x^8 using only 3 multiplies. look at this: > f1 <- function(x){x*x*x*x*x*x*x*x} > f2 <- function(x){x^8} > f3 <- function(x){x2 <- x*x;x4 <- x2*x2;return(x4*x4)} [so f1() and f2() and f3() are

pretty() works well for numbers and axTicks() can help for potting log axes, but has anyone written a pretty for chron objects (or other date or date-time classes)? It would have natural units of years, months, .., days, hours, (minutes?), and it would choose the appropriate unit based on the date(time) range. I have searched the archives and documentation to no avail. (I wrote one of these back

Could someone please help me by giving me a reference to how one computes standard errors for the coefficients in an orthogonal linear regression, or perhaps someone has some R code? (I would accept a derivation or formula, but as a former teacher, I know how that can rankle.) I tried to imitate what's done in the code for lm() but went astray somewhere and got nonsense. (This type of

..._LIBS to look there. Changed R_LIBS, fixed problem. DOH! So now if I want to use several versions of R simultaneously, what do I do. I set R_LIBS so it would look also in C:/R/extra for some added packages. Thanks and sorry again, David -----Original Message----- From: David Reiner <davidr at rhotrading.com> Sent: Thursday, April 21, 2005 9:40 AM To: r-help at stat.math.ethz.ch Subject: R 2.1.0 for Windows installation error? atanh not in R.dll? Could someone please tell me what I did wrong to create this message or what I should do to correct this problem? I downloaded 2.1.0 Windows binary...

I'm getting warnings when I plot a zoo object: > dts <- chron(rep("2007-09-10", 5), paste("00:0", 0:4, ":00", sep=""), c("y-m-d", "h:m:s")) > dat.zoo <- zoo(1:5, dts) > plot(dat.zoo) Warning messages: 1: In v[[perm[1]]] : partial match of 'm' to 'month' 2: In v[[perm[2]]] : partial match of 'd'

I just noticed a change in the behavior of list.files from 2.6.1pat to 2.7.0 (I noticed it in 2.8.1 and traced back.) Previously, if the directory ended with a slash, and full.names=TRUE, the names returned had a single slash at the end of the directory, but now there are two. I noticed since I was getting a list of certain files and then grepping in the list for a full name formed with a

I'd like to insert (for example) the current datetime into a comment so it goes into the history. I can of course cut and paste the results of date() into a comment line, but it would be easier and more powerful to be able to type something like > hstamp() and have it go into the history. More generally, I would like to put any expression to be evaluated into this function. For