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Quick newb question about R relating to the line of code below: rawCool = read.zoo("cooling.txt", FUN = as.chron, format = "%m/%d/%Y %H:%M", sep = "\t", aggregate = function(x) tail(x, 1)) I'm wondering what the specifics are for the argument where it has "aggregate = function(x) tail(x, 1)". I understand that it removes the last row of

>aggregate(z, identity, mean) 1 2 3 4 5 1.0 3.0 5.0 6.0 7.5 > aggregate(z, mean) Error: length(time(x)) == length(by[[1]]) is not TRUE Can someone help me understand the error above and why "identity" is necessary to satisfy the error -- View this message in context:

I have three columns in my raw data: date, time, and dry bulb temperature: http://r.789695.n4.nabble.com/file/n4495326/weathDataSDCoron.txt weathDataSDCoron.txt The date format is %Y%m%d and the time format is %H:%M. Any ideas on how to read it in such that it looks at the first two columns and then merges it into one column combining both the date and time? -- View this message in context:

Here's my script: http://pastebin.com/zx3TCtXg I want to draw attention to the code block where the read in of the raw data is located. Is there a function that filters out unwanted data with respect to a ceiling limit. For example, I want to remove any value over 500 kW in the rawCool variable. Any ideas where to go with that? I figure it would be an argument within read.zoo or an external

Here's the small scale version of the R script: http://pastebin.com/sEYKv2Vv Here's the file that I'm reading in: http://r.789695.n4.nabble.com/file/n4487682/weatherData.txt weatherData.txt I apologize for the length of the data. I tried to cut it down to 12 lines, however, it wasn't reproducing the bad output that I wanted to show. The problem is that my whole data set

Here's my code: http://pastebin.com/0yRxEVtm The important parts are uncommented and should be easy to find using the link above. For the following line of code, I plan on looking for a way to offset it up 7 rows so that the 15 minute timestamp would be considered the "median" of the subset being averaged to find the mean: avgCool = aggregate(intCool, trunc(time(intCool),

Here is the data I'm working with: http://r.789695.n4.nabble.com/file/n4530888/new.txt new.txt http://r.789695.n4.nabble.com/file/n4530888/old.txt old.txt My code is here: http://pastebin.com/9jjs6Ahr I'm looking for away to simply attach the new.txt to the bottom of old.txt through R, else I'll just throw it in Excel to do some preprocessing. I've looked into using merge,

I truncated and simplified my code and the read in data that I'm working with to isolate the issue. Here is the read in data and R script respectively: http://r.789695.n4.nabble.com/file/n4604287/test.csv test.csv http://pastebin.com/rCdaDqPm Here is the terminal/R shell output that I hope the above replicates on your screen: > source("elecLoad.r", echo = TRUE) > #Load

Easy question a bit. So here's my code: http://pastebin.com/F4iQPVy5 I am trying to read in a series of timestamps. However with POSIXlt as FUN in read.zoo, the output is merely two numbers and is not the output that I'm hoping for. The code above should reproduce the error. Here is code that shows what I want it to do: http://pastebin.com/GEPZ5R9B The problem though, is that it's

Here's the raw data I'm working with (will be available temporarily): http://dl.dropbox.com/u/41922443/dataout_2471_843.csv Next, here's the code I want to impose (error that I'm seeing SHOULD reproduce on your shell when script is executed...btw using Ubuntu Linux 11.10 if that makes a difference): http://pastebin.com/LDNw8UT0 The issue specifically is the last line of code in