similar to: how to add data to some ts

Hello, I am a new user of R. I am coming from SAS and do statistics on stock market data, economic data, and social data. My question is this: How can you get the mean, standard dev, etc. of a variable based on a conditional statement on either the same variable or a different variable in the same data set? So if I had the closing prices of the S&P from 01/01/1990-12/31/1990, how could I get

R function lm(response ~ term) allows me to run a linear regression on a single response vector. For example, I have recent one year historical prices for a stock and S&P index. I can run regression of the stock prices (as response vector) against the S&P index prices (as term vector). Now assume I have 1000 stocks to run the above regressions (against the same S&P index prices).

Hi RUsers, Suppose I want to see the data on the website url <- "http://www.nseindia.com/content/indices/ind_histvalues.htm" for the index "S&P CNX NIFTY" for dates "FromDate"="01-11-2010","ToDate"="02-11-2010" then read the html table from the page using readHTMLtable() I am using this code webpage <-

Hi all R-Experts, I'm facing one problem in yahoo data downloading. I'm suing Windows XP, R 2.2.0, and i'm using yahoo.get.hist.quote function to download data. I need 500 companies of S&P index daily 'closing price' data for last ten years. My questions are: 1) I have all the ticker names of S&P 500 companies in a .csv format. I'm reading those names in R and

Hi RUsers, Suppose I want to see the data on the website url <- "http://www.nseindia.com/content/indices/ind_histvalues.htm" for the index "S&P CNX NIFTY" for dates "FromDate"="01-11-2010","ToDate"="02-11-2010" then read the html table from the page using readHTMLtable() I am using this code webpage <-

Hi, For kicks I tried installing the newest version of TradeStation which came out yesterday using the WineHQ tarball build I just did. The install goes along for a few minutes but then failes with the info below. The error is repeated lots of times and then just dies as shown. I'm wondering if TS requires some Windows stuff that isn't part of the normal build? Thanks, Mark mark

Dear all, I am stuck trying to get RPostgreSQL running on my Mac. PostgreSQL itself does work fine as it is able to connect with various other apps. Unfortunately the RPostgreSQL package is not available as a binary for MAC OS. Thus I?ve been trying to compile the source for quite some time now - unfortunately without success (or at least very limited success). First, running

For the small number of people who are checking this out, I released version 0.05 a couple days ago (and only mentioned it on my new-protocol web page) followed today by 0.06. Some highlights of the two releases: - We handle symlinks now in our recursive synchronization mode. - Directory scanning is no longer limited to one active directory at a time (which was sorely needed when all the

Hi, I haven't attempted to use Wine in at least a couple of years so I'm VERY out of date with how to really set it up and install an application. However I'm using TradeStation on Windows Vista and not enjoying Vista at all so I'm motivated to at least see if TS would work under Wine. My initial attempts didn't go so well so I'm checking in to see what the real users

I have 2 zoo objects - 1) Interest rate spread between 10-YR-US-Treasury and 2-YR-US-Treasury (object name = sprd) 2) S&P 500 index (object name = spy) > str(spy) ?zoo? series from 1976-06-01 to 2011-03-31 Data: num [1:8791] 99.8 100.2 100.1 99.2 98.6 ... Index: Class 'Date' num [1:8791] 2343 2344 2345 2346 2349 ... > str(sprd) ?zoo? series from 1976-06-01 to 2011-03-31

Dear all, i am trying to get PL / R running on Mac OS X. PostgreSQL is already running and connects just smoothly to R via DBI / RPostgreSQL . Despite finding a couple of posts of people with the same problem (i.e. error message) i could not get it done for me. I use Mac OS 10.5.7 and PostgreSQL 8.3.7 as well as R 2.9.2 I put the untared plr to my /Library/Frameworks/R.framework/Resources/

Hi there, is there a possibility to count the number of appearances of an element in a vector ? i mean of any given element.. deliver all elements which are exactly xtimes in this vector ? thx in advance !!

Hi everybody, somehow i dont get the shapiro wilk test for normality. i just can?t find what the H0 is . i tried : shapiro.test(rnorm(5000)) Shapiro-Wilk normality test data: rnorm(5000) W = 0.9997, p-value = 0.6205 If normality is the H0, the test says it?s probably not normal, doesn ?t it ? 5000 is the biggest n allowed by the test... are there any other test ? ( i know qqnorm

Dear all, i have a problem with processing dataframes within a function using the "$". Here´s my code: recode_items = function(dataframe,number,medium=2){ # this works q<-paste("columna",number,sep="") # this does not work, particularly because "dataframe" is not processed # dataframe should be: givenframe$columnagivennumber

Dear all, i am stuck with a syntax problem. i have a matrix which has about 500 rows and 6 columns. now i want to kick some data out. i want create a new matrix which is basically the old one except for all entries which have a 4 in the 5 column AND a 1 in the 6th column. i tried the following but couldn´t get a new matrix, just some wierd errors:

Hello I have daily S&P 500 from 1950 for which I would like to do some time series analysis in R. Could someone please show me an example of how to create a ts/ irts object for my data? Additionally, how do I create monthly subsamples of the data. I've experimented with the window function but haven't had any luck. Thank you Ian Confidential: This electronic message and

HI there, i know this is a basic question, though i need some help because this is somewhat away from my current issue, but nevertheless interesting to me... Lets assume i have some estimated probabilities, say estimated by a logit model. i know i can also state them as an odds ratio. Now i?d like to state these odds ratios as a reference to a specific outcome of my investigated

Dear all, my R files (and the .csv files as well) are saved somewhere pretty deep down my hard disk. i have to chage to working directory therefore everytime i run R (i run it on powerPC mac), which is disgusting. using the setwd command at the beginning of an R script doesnt really help because i have to find this file first by hand. I am looking for possibility to run setwd during the

Hi, I have a bunch of irregularly spaced xts time series (with a POSIX index), and I'm trying to write a function that fillls the missing days. Using a solution suggested by Gabor Grothendieck for zoo, I wrote the following: # FD: Fill missing days FD<-function(ser) {rng<-range(time(ser)) > temp<-merge(ser,xts(,seq(rng[1],rng[2],"day"))) >

Hi I have created the following plot over the empirical returns.. What I now want to do is to overlay a curve/line with the normal density as a comparison of the two. Does anyone know how to do this? (NB the last two lines are the problem, and are wrong, I know). Thank you in advance! Rikke http://r.789695.n4.nabble.com/file/n3768783/S%26P_500_spot_and_return_2010.csv