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Thank you for your help. Yes, my problem is one of non-response. We try to hand a survey form to everyone that boards at each stop, but we're getting only ~10% usable responses. One reason is that the...
I have a time zone problem. Running the code provided I get the result in UTC, and a lot of warnings like this: 28: In as.POSIXlt.POSIXct(x, tz) ... : unknwon timezone 'PST' > sunrise.set(34.11583, -118.18719, "2008...
In this toy data, each of the tables should sum to 1111 None of the tables shows NA columns or rows. > ################################ > ToyData <- read.table("C:/Data/R/Toy.csv", header=TRUE, sep=",", na.strings="NA", dec=".", row.names="ID_Num...
OT question: can R produce Cartograms? Here's an example of World Population: http://www.worldmapper.org/display.php?selected=2 This might make Texas smaller and Rhode Island larger.... Robert Farley LACMTA -----Original Message----- From: r-help-bounces at...
Sorry, the error was "OTOSOTK" {On The Other Side Of The Keyboard}. Someone renamed one of the subdirectories (60 to 06) and I couldn't see it. Sorry for the bandwidth.... Robert Farley Metro www.Metro.net -----Original Message----- From...
There may already be tools for gravity model APPLICATION, which is simply an exercise in normalization. Perhaps if I describe the gory details, someone will recognize the problem by another name. A singly constrained gravity model is simply an exercise...
Thank you for the list of references. Do you know of any "free" references available online? I'll have to find my library card :-) My motivation is to try to correct for a "time on board" bias we see in...
Str() found the problem; there were 2 blanks at the end of the name. Why does this occur when I read in with trim.factor.names = TRUE ? > #### > OBDataSumm <- read.spss("P:/Data/OBSurveys/OBSurvey-2010-2011/Final Delivery, Metro On...
Each row of my dataframe has these data items: Stuff1 Stuff2 TripID StopID moreStuff1 moreStuff2 ... I might have 2 entries for TripID=9011890 and StopID=Reseda, while I know the "Universe" for that combination was 7. I'd like to...
So if I put $10 and $20 into the envelopes, then told you that the values were multiples of $10, it would be wrong for you to assess probabilities on $100, $1,000,000 and so on? :-) But what if...
The common "Monty Hall" problem (where the MC helps out the contestant) is not random! See: http://en.wikipedia.org/wiki/Monty_Hall_problem My edits were removed as I had no references. :-( Maybe you can verify my statements, included...
The problem here is Table doesn't seem to have a way to weigh the data. > ToyData Data1 Data2 Data3 Weight 101 Sam Red Banana 1.1 102 Sam Green Banana 2.1 103 Sam Blue Orange 2.1 104...
Let's see if I understand this. Do I iterate through x <- factor(x, levels(c(levels(x), NA), exclude=NULL) for each of the few hundred variables (x) in my data frame? I tried to do this all at...
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