similar to: Interfacing with user in R

Good day everyone. I have a large dataset of 1 min wind speeds covering 5 years. How can I make an array of maximum daily values? The vectors I have are: 'VDATE' with dates in format '%Y-%m-%d' (like '1992-10-28') and 'WS' with wind speed data (same number of elements as VDATE). I want an array with 2 columns: Max daily wind speed and corresponding day. Has

Good day everyone, I want to assess the error when fitting a Gram-Charlier CDF to some data 'ws', that is, I want to calculate: Err = |ecdf(ws) - GCh_ser(ws)| The problem is, I cannot get the F(x) values from the ecdf. 'Summary(ecdf())' returns some of the x-axis values, but how do you get the F(x) values? Thank you for any help you can provide. Regards, Augusto

Good day everyone, Can anyone suggest an effective method to solve the following problem: I have 2 dataframes D1 and D2 as follows: D1: dates ws wc pwc 2005-10-19:12:00 10.8 80 81 2005-10-20:12:00 12.3 5 15 2005-10-21:15:00 12.3 3 15 2005-10-22:15:00 11.3 13 95 2005-10-23:12:00 12.3 13 2 2005-10-24:15:00 10.3 2 95 2005-10-25:15:00 10.3 2 2 D2:

Good day, Is there any way to save a plot produced by R in a LINUX (Debian) machine? The window opened by R to put the plot in, does not give any option to save it (there are options to move, close, minimise it, etc. but not to save it). How do you do that? Thanks, Augusto -------------------------------------------- Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group

Good day everyone, I want to use zoo(aggregate) to calculate 15-min mean values from a wind dataset which has 1-min values. The data I have looks like this: vector VDATE vector WS 1 1998-10-22:02:11 12.5 2 1998-10-22:02:12 10.1 3 1998-10-22:02:13 11.2 4 1998-10-22:02:14 10.5 5 1998-10-22:02:15 11.5 . . . n

Good day everyone, I want to use the Gram-Charlier series expansion to model some data. To do that, I need functions to: 1) Calculate 'n' moments from given data 2) Transform 'n' moments to 'n' central moments, or 3) Transform 'n' moments to 'n' cumulants 4) Calculate a number of Hermite polynomials Are there R-functions to do any of the above?

Davood, I developed an MC simulation model for wind hazard analysis last year. I found three important issues to increase efficiency: 1) Reuse most variables in each loop 2) Write results (1000 stats) to external files, perhaps one file for each condition. (a good ID for each file can be implemented using "paste") 3) Develop a function to process the results stored in the external

Hello, we have a set of biological cell-size data, which are only available as frequencies of discrete size classes, because of the high effort of manual microscopic measurements. The lengths are approximately gamma distributed, however the shape of the distribution is relatively variable between different samples (maybe it's a mixture in reality). Is there any ML fitting (or

Dear R-lister Could anyone know how to make a multi-line title for a plot with expression()? In my plot, the title should be writeen in two lines (because it is two long for one line) and it should use a mathematical expression. I tried to use "\n", but "\n" is ignored in expression() call: hist(diffChangeRequestHintsBeforeAnswering[,4], br = 50, xlab = "Skill Change in

Does anyone know of a resource for learning the basics of how to manage and manipulate dates and times in R? I have been reading "Introductory Statistics with R" by Peter Dalgaard which is fantastic. But alas, I could find no reference to date and time. I have looked at the reference manual but it is particularly unapproachable. So rather than dense technical talk I would rather see a

Hi, I am new to R and I'm looking to perform some method comparison analysis and would be grateful for some help regarding package installation. There is a package 'MethComp' that I want to use (http://staff.pubhealth.ku.dk/~bxc/MethComp/Courses/Sthm.2007/.) Unfortunately I am unable to install it. I have tried numerous approaches but to no avail. this is the first time I have tried to

Colleagues, I am using R 2.4.0 on both a Mac (10.4.8) and Linux (RedHat 9). To read data from an Excel spreadsheet, I do "save as" in Excel, then select the "Text (tab-delimited)" format. The resulting file uses a tab separator and I can usually read the file using read.delim. Sometimes, the header row contains embedded carriage returns. When I view the file,

Hi all, I have a very simple question that I can't seem to find the answer to. How do I extract rows that meet a certain criteria from a data frame and group them into a new data frame? For example, if I want to make a new data frame that only includes rows of data for which the p values (given by one of the columns in the data frame) are less than a certain value, how do I do this? It seems

Dear All: I create a file named :"P_Value" with only one simple function: P_Value <- function( Table ) { S = fisher.test(Table, alternative = "two.sided"); return(S$p.value); } However, it seems that it's impossible to use this function directly, because no matter where I save this file, R always reports

Hi R users, Im trying to install XML source package (in window platform) using the following command. *install.packages(pkgs = "C:\\Documents and Settings\\skang\\Desktop\\Softwares\\R\\Library\\XML_2.6-0.tar.gz", repos = NULL, type = "source")* and get the following result. gzip: stdin: unexpected end of file /cygdrive/c/Rtools/bin/tar: Unexpected EOF in archive

>From Tom: In R 2.2.0 under Windows, I want to be able to give it a filename such as "myFile.txt" without the quotes. But actually I mean: C:\Documents and Settings\Tom\My Documents\qpaper7\R Project Started 19 Dec 05\myFile.txt If I were to repeat this each time, my computer would get all bored and cranky and start to drop bits (only a joke, of course). I think I want to set

Hi, I am trying to load csv type data from a folder. However, rather than syntax that simply loads one file at a time I was wondering if there is a method that loads all data from a specific folder. For instance, I have the following data files in a folder nebraskaStats: 10-1-2009_10-7-2009.txt 10-2-2009_10-8-2009.txt 10-3-2009_10-9-2009.txt ....etc. (245 total files in folder) Each file

Hi all, I my c: drive I have possibly 1,000 notepad files, with .txt extension. They are named as the dates on which they were saved i.e. 1st file name is "Volume_4-18-2008", 2nd one is "Volume_4-21-2008", 3rd one "Volume_4-22-2008" and so on............ Also, content of each file are in same format like : ******** content of 1st file ************* section : 1

I received by email an R package (file.tar.gz) that was created in Linux. The package was already installed in another computer in linux using install.packages and it worked I am not familiar with installing packages but I would like to install it on Windows I downloaded the Rtools29.exe and tryed to install using install.packages("foo.tar.gz", repos=NULL, type="source") but

Dear R users: I have a data set that looks something like this: ID time y 1 2/01/2008 4 1 2/09/2008 12 1 9/01/2008 8 2 1/06/2008 3 2 3/01/2008 4 2 3/09/2008 9 2 6/03/2008 4 3 1/02/2008 3 3 1/10/2008 8 3 2/02/2008 7 3 2/10/2008 3 I'd like to sum up the weekly data to the monthly level, so that it looks something