similar to: finding correlation for lagged values

Dear all, I am having difficulties using the seemingly-simple function lag. I have a dataframe with several weather variables (maxitemp, windspeed, rainfall etc), and the response variable (admissions). The dataset is fairly large (1530 observations). I simply want to model the response against a lag of a couple of the explanatory variables, say maxitemp and rainfall. I would like to look at

Hi I'm computing the correlation between two time-series x_t and y_t-1 (time-series lagged using the lag(y,-1) function) using the cor() function and the returned value is different from the value of ccf() function at the same lag. Any ideas why this is so? Thanks in advance for any hints. Mihnea [[alternative HTML version deleted]]

Dear R-help, How could a cross-correlation plot be optimized such that the relationship between seasonal time-series can be studied? We are working with strong seasonal time-series and derived a cross-correlation plot to study the relationship between time-series. The seasonal variation however strongly influences the cross-correlation plot and the plot seems to be ?rather? symmetrical (max

Hi My data looks like this startDate="2008-06-01" dateRange =c( "2008-10-01","2008-12-01") Is there any method to find the week number from the startDate range ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/Week-number-from-a-date-tp4410223p4410223.html Sent from the R help mailing list archive at Nabble.com.

I am new to R and new to time series modeling. I have a set of variables (var1, var2, var3, var4, var5) for which I have historical yearly data. I am trying to use this data to produce a prediction of var1, 3 years into the future. I have a few basic questions: 1) I am able to read in my data, and convert it to a time series format using 'ts.' data_ts <- ts(data, start = 1988, end =

Hi I have a data-frame which look like this X1 X2 X3 1 3 5 2 4 6 3 6 1 I want to apply a formula Y=6*X1 + 7*X2 + 8*X3 for every row Thanks in Advance -- View this message in context: http://r.789695.n4.nabble.com/how-to-call-a-function-for-each-row-tp4122906p4122906.html Sent from the R help mailing list archive at Nabble.com.

Hi I have set of records seperated by a separator say "$$$" i want to get the values in a dataframe. eq qwer$$12$$qwre ewrtr$7789$ewwe I want the output as\ V1 V2 V3 qwer 12 qwre ewrtr 7789 ewwwe Please help me ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/Help-in-splitting-the-records-tp4650827.html Sent from

Hi I have a variable str = " X", "Y" and values ("0","12") i want to set value for X =0 and Y =12 and use inside the program. how to do this Please anybody help me. -- View this message in context: http://r.789695.n4.nabble.com/Setting-the-Values-tp3823388p3823388.html Sent from the R help mailing list archive at Nabble.com.

Hi I have a data class wise. I want to create a histogram class wise without using for loop as it takes a long time my data looks like this x class 27 1 93 3 65 5 1 2 69 5 2 1 92 4 49 5 55 4 46 1 51 3 100 4 ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/Histogram-classwise-tp4528624p4528624.html Sent from the R help mailing list archive

Hi I 've a data a=c(10,20,30) b=c(100,200,300) c=c(50,60,70) I want to compare a[1]<=c[1]<b[1],...... How to compare for all the records ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/comparing-three-vectors-tp4636728.html Sent from the R help mailing list archive at Nabble.com.

I have a long string. i want to sepearate a 10 digit phone no from it. eg "my no is 9876543210 is personal no and my official no is 123-456-8907. you can use any of these" i want to seperate the 9876543210 and 123-456-8907 from this. therev may be many phone nos in the string. how to do it ----- Thanks in Advance Arun -- View this message in context:

Dear R-users, I have been using R and its core-packages with great satisfaction now for many years, and have recently started using the "ccf" function (part of the "stats" package version 2.16.0), about which I have a question. The "ccf"-algorithm for calculating the cross-correlation between two time series always calculates the mean and standard deviation per time

Dear All, I am studying some process measurement time series in R and trying to identify time delays using cross-correlation function ccf. The results have however been bit confusing. I found a couple of years old message about this issue but unfortunately wasn't able to find it again for a reference. For example, an obvious time shift is observed between the measurements y1 and y2 when the

Hello everybody, I am sorry if my questions are too simple or not easily understandable. I’m not a native English speaker and this is my first analysis using this function. I have a problem with a cross correlation function and I would like to understand how I have to perform it in R. I have yearly data of an independent variable (x) from 1982 to 2010, and I also have yearly data of a variable

Hi I'm not getting any results in R console when i run commands. I reinstalled R but the results are same ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/Results-not-dispalying-in-R-console-tp4647271.html Sent from the R help mailing list archive at Nabble.com.

Hi I want to generate 4 random number which sum up to 100 always Please help ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/runif-with-condition-tp4278704p4278704.html Sent from the R help mailing list archive at Nabble.com.

Hi I have a data frame and i need to change the date format in it. my dataframe X Date 1 1/1/2009 2 2/1/2009 3 3/1/2009 I need to change it to 2009-01-01 -- View this message in context: http://r.789695.n4.nabble.com/changing-date-format-in-a-dataframe-tp4076411p4076411.html Sent from the R help mailing list archive at Nabble.com.

Hi, I have a dataset X Y A= 10 15 20 30 40 50 B = X Z 10 30 20 50 I have a table containing X Y Z columns How to insert a data frame into the table without using for loop ? now currently i'm using the for loop with using the insert command? ----- Thanks in Advance Arun -- View this message in

hi I have a data like thursday, November 20,2012. I'm not able to convert into data format in R Can anyone please help ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/read-the-date-format-tp4635245.html Sent from the R help mailing list archive at Nabble.com.

Hi I have a find the class of each variable of the data set which is given as input. I can able to find the string and the numeric variable. Not able to find if the variable is date or not Can any one help me. ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/how-to-get-a-date-variable-from-a-dataset-tp4639038.html Sent from the R help