similar to: POSIXlt converted to POSIXct in as.data.frame()

I have searched help topics but don't know exactly what to search for. Need to use my_num to find any matching STREPs in my_df my_num <- c("101","102","103","104","105","107","108","112","113","114","115") ## "my_df" has 8,000 different STREPS in it. ## I have a

Hi folks, I'm trying to figure out how to get summarized data based on multiple columns. However, instead of giving summaries for every combination of categorical columns, I want it for each value of each categorical column regardless of the other columns. I could do this with three different commands, but i'm wondering if there's a more elegant way that I'm missing. Thanks!

Dear R users, I have got the following data frame, called my_df: gender day_birth month_birth year_birth labour 1 F 22 10 2001 1 2 M 29 10 2001 2 3 M 1 11 2001 1 4 F 3 11

Hi- Is it possible to use search parameters with will_paginate? For example, something like this: @var = Model.paginate :per_page => 20, :page => params[:page], :order => ''my_date DESC'', :conditions =>["my_date >= ? AND my_date <=?",@start,@end] I am getting some errors with this, but will this generally work?

I am sorry if this is a faq or tutorial somewhere, but I am unable to solve this one. What I am looking for is a count of how many different categories(numbers in this case) that appears for a given factor. Example: > l <- c("Yes", "No", "Perhaps") > x <- factor( sample(l, 10, replace=T), levels=l ) > m <- c(1:5) > y <- factor( sample(m, 10,

Hi Folks, I'm trying to find a way to remove all terms in a formula that contain a particular interaction. For example, in the formula below, I'd like to remove all terms that contain the b:c interaction. > attributes(terms( ~ a*b*c*d))$term.labels [1] "a" "b" "c" "d" "a:b" "a:c" [7]

I am building an application and I have generated the scaffold for a product. In the list method I include something like my_date = Datetime.now and the result I get from the webrick is an error uninitialized constant Datetime Do I have to add a line with a require? I am new at ruby on rails thanks in advance -- Posted via http://www.ruby-forum.com/.

R-Help Community How do I add a numeric class to a data .frame. For example, I have calculated the following probabilities 1 2 3 0.0011566127 0.0009267028 0.0081623324 How would I add them back into my data.frame for example My_df <- data.frame(col_1 = c('A', 'B', 'C')) such that I end up with col_1

How can I apply difftime to a vector of sorted dates? I can do this just fine with diff, but difftime doesn't seem to take in a vector. > diff(r$BOOKING_DATE) Works. Great! > difftime(r$MY_DATE, units="days") Error in as.POSIXct(time2) : argument "time2" is missing, with no default Thanks, Bradford [[alternative HTML version deleted]]

In the example in the documentation, I see: rs <- dbSendQuery(con, "select Agent, ip_addr, DATA from pseudo_data order by Agent") out <- dbApply(rs, INDEX = "Agent", FUN = function(x, grp) quantile(x$DATA, names=FALSE)) Maybe I am a bit thick, but it took me a while, and a kind hint from Phil, to figure much of this out. It is clear that the SQL

Dear all, I have some additionale question concerning the spgrass6 package. * When you set a region in GRASS, does the readGRASS6 function in R only load data contained in the zoomed region or the whole map ? * When you have a MASK map in grass, does the readGRASS6 function in R only load data contained inside the MASK area ? Could this be the problem ? Thanks, Jessica

I have a customer that has a request that the select_datetime fields have AM/PM selectors instead of 24 hour time. The rails time and datetime selects seem to only support 24 hour time. I can''t seem to find any information on this. i was wondering if there is already a solution out there, or will i have to roll my own? Sean Wolfe master nerd of i heart squares, inc. 3711 N.

I have a question about how to filter the data frame: Suppose my data frame has variables like gender, age,... How to get a subset of the data frame, with only female (or male) and/or age > 50...? What is the typical syntax? I tried several condition expressions, but none of them worked... Thanks a lot! -- View this message in context:

Hi, I'd like to graph three lines on ggplot2 and I intend the lines to be "solid", "dashed", and "dotted". The legend names are "name_b", "name_a", "name_c". I'd like to legend to present in the order: the "name_b" at the top, and "name_c" at the bottom. As a consequence, the legend is indeed in the order:

How do I add multiple conditions to a paginated list? I have: @post_pages, @posts = paginate(:posts, :per_page => 10, :conditions => [ ''(title) OR (body) LIKE ?'', ''%'' + params[:query] + ''%''], :order =>

Hi R list: How can I "repeat" a data frame n times (with n>1000), and obtain a new data frame where all the n data frames are binded by rows? Thank you for your help Kenneth -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Hi all, I am using InstantRails with MySQL-Front. Date is stored in format yyyy-mm-dd in database. I want to retrieve and show date in dd-mm-yyyy in my view.rhtml. How can I change it to dd-mm-yyyy form. Please help me out. Thanks -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google

When I convert a datetime to a string, it prints out something like this Jan 20 12:00:00 EST 2006 I want to trim off the last twelve characters, i.e. :00 EST 2006 I tried to do it like so: @date = @meeting.date.to_s.chomp.chomp.chomp.chomp.chomp.chomp.chomp.chomp.chomp.chomp.chomp.chomp but the chomps seem to do nothing. I''d love to use regex, but I don''t know which

Hello, I am trying to deal with a database table that contains a date in the form of the number of seconds since epoch. Data is inserted in this format by an existing script that I can''t change, so a schema change isn''t realistic. I would like to allow humans to view and edit this data in the form of an actual human-readable date. I figured a facade column would be the

Dear R helpers Suppose I have a data.frame as given below - my_dat = data.frame(class = c("XYZ", "XYZ", "XYZ", "XYZ", "XYZ","ABC", "ABC", "ABC", "ABC", "ABC" ),  var1 = c(20, 14, 89, 81, 17, 44, 36, 41, 11, 36), var2 = c(1001, 250, 456, 740, 380, 641, 111, 209, 830, 920)) > my_dat    class