similar to: if a variable is defined

I am using getSymbols function from quantmod package to get price data from internet. Currently I have: my.ticker <- "IBM" getSymbols(my.ticker,src="google") This creates an xts object named my.ticker which contains historical price data for IBM. How can I call and manipulating this xts object using my original string my.ticker? I want to do: colnames(my.ticker) <-

I have two vectors: both have possible values of 1,-1, or 0 trend1 <- c(1,1,1,1,1,1,-1,-1,-1,-1,-1,-1) trend2 <- c(1,1,1,1,1,1,1,1,1,1,1,1,1,1,) i want to create a third vector that is conditional upon these two vectors: if (trend2 == 1 && trend1 == 1) {position <- 1} elseif (trend2 == -1 && trend1== -1) {position <- 1} else {position <- 0} based on this two

I have a function with the follow signare: apply.strategy(instr, strat) where instr and strat are both objects of classes instrument and strategy respectively. I want to apply this function to a list that holds objects of the class instrument. Currently I am doing this by explicit looping: for(i in length(instr.list) ) { apply.strategy(instr.list[[i]], my.strat) } Is it possible to

I have a data frame with the following columns: Date Price Buy Sell The Buy and Sell variables are binary. They are either zero or 1. Additionally, they are mutually exclusive. Either Buy is 1, Sell is 1 or they are both 0. But they are never both 1 for a given observation. I want to see observations for either either Buy == 1 or Sell ==1 (but not the ones where Buy == 0 and Sell ==0). How can

Hi All Is there who knows to define multi line comment? ( in Java we can define by /* and */ ) Best Regards Kushan Jayathilake --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To

Hi, I created a class (S4) with some slots like value, date, description (it's actually a financial transaction class). Now I need a method to convert this class forth and back into a single row data.frame, where every slots represents a column. This method looks at the moment like this: > setMethod("as.data.frame", "Transaction", function(x, row.names =

Tune xen_netbk_count_requests to not touch working array beyond limit, so that we can make working array size constant. Signed-off-by: Wei Liu <wei.liu2@citrix.com> --- drivers/net/xen-netback/netback.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index

I am new to R( but quickly being awed by the range of this it can accomplish, you have one more convert to the useR universe). I have successfully implemented the apriori function and are getting great results. My question concerns how to export these results. I have read lots about write.csv functions and exporting data frames and other standard objects. Im having difficulty working with these S4

Hi all, I have this microarray large microarray data set (ALL) from which I would like to subset or extract a set of data based on a factor ($mol.biol). I looked up some example of subsetting in, picked up two commands and tried both but I got error messages as follows > testset <- subset(ALL, ALL$mol.biol %in% c("BCR/ABL","ALL1/AF4")) >> Error in

The default initialization for slots of class "factor" and "data.frame" gives NULL. This seems odd, since those slots can't ever be set to NULL by the user. I would expect zero-length instances of factor and data.frame. Here is an example: setClass("FOO", representation(a="factor", b="data.frame", c="numeric")) [1] "FOO"

I have a series of data frames that are identical structurally, i.e. - made with the same code, but I need to add them together so that they become one, longer, data frame, i.e. - each of the slot vectors are increased in length by the length of the added data frame vectors. So if I have df1 with a slot A so that length(df1$A) = 100 and I have df2 with a slot A so that length(df2$A)=200 then I

Hi again, I must be misunderstanding something fundamental about how an S4 class stored in a data.frame can be persuaded to print according to a desired format. The help page says: format.data.frame formats the data frame column by column, applying the appropriate method of format for each column. Here is my class: > setClass("A",contains="character") [1] "A"

I have an S4 object class defined in a Bioconductor package which contains multiple slots, some of which are tibbles, whilst others are vectors. If I call slot(object, name) where 'name' is an slot that contains a vector, everything works as expected. However, when I call slot(object, name) where 'name' is an slot that contains a tibble I get the following warning: Warning

Hello, I have a dataset concerning slugs. For each slug, the number of pumps per one time slot was counted. The number of pumps follows Bi(30, p) where p is very small, thus could be approximated by Poisson dist. (# of pumps is very often = 0) The slugs were observed during 12 time slots which are correlated in time as AR(1). The time slots are divided into two categories: Resting time

Hej hej, is there a way to extend the SpatialPointsDataFrame data slot?This is the structure of an object of it:> str(coord) Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots ..@ data :'data.frame': 214 obs. of 2 variables: .. ..$ location.long: num [1:214] -79.8 -79.8 -79.8 -79.8 -79.8 ... .. ..$ location.lat : num [1:214] 9.16 9.16 9.16

How would you implement attach()ing to a user-defined class with multiple slots in R? A primary goal of my software is to hide the data representation from the user, allowing them to attach() to my program's complex classes and refer to their contents by name - THEREBY avoiding having to pass the classes to every function call. Also, is it true that attaching to a to a sub-classed list

Evan Cheng wrote: > > On Dec 3, 2007, at 12:53 PM, Vladimir Prus wrote: > >> >> Suppose I have a target that does not have register+constant >> addressing mode. Then, I have DAG like: >> >> (store ..., (frameindex)) >> >> Targets like SPARC have the following patterns to catch this: >> >> def ADDRri : ComplexPattern<i32, 2,

On Fri, Mar 2, 2012 at 11:32 AM, Evandro Menezes <emenezes at codeaurora.org> wrote: ... > Figure 3.3 on page 16 of www.x86-64.org/documentation/abi.pdf is not > normative. See foot note 7 in the same page. Figure 3.4 on page 21 > confirms that the use of a frame-pointer is optional. > > So, if one doesn't use ENTER in the prologue and uses RSP to access local >

On Thu, Sep 7, 2017 at 11:11 AM, Robinson, Paul <paul.robinson at sony.com> wrote: > Different intrinsics sounds like a good solution to me. J > > > > So what happens with the case where a variable is registerized but later > we decide to spill it? Presumably we'd have a dbg.addr to point to the > spill slot. In past compilers I've used, spill slots were

Using slot() on object (or "@") and using a nonexistent slotname returns an error (see example code). R> setClass("foobar", representation=list(a="numeric")) [1] "foobar" R> foobar <- new("foobar", a=5) R> foobar at a [1] 5 R> foobar at b Error: no slot of name "b" for this object of class "foobar" The details