search for: wildland

I want to add identifier column (Date) to a time series data frame. I want to name the "Date" column be from 1 to 30 every 1440 rows. Say I have a data like this (I simply my actual data here): $dat ID Var 1 1 2 4 3 6 4 7 5 7 6 8 How can I add identifier column (Date) from 1 to 3 every 2 rows and have output like this: ID

...ect (the number that follow the B or T). I've been unable to come up with a solution that produces the group and subject within group columns as well as both types of measurements. Any assistance would be greatly appreciated. Thank you. Toby Toby Gass, Ph.D. Visiting Lecturer, Forestry and Wildland Resources Humboldt State University email: toby.gass <at> humboldt <dot> edu

hi, I want to do hierarchical clustering with Jaccord index. I tried to do with vegan package for finding index and hierarchical clustering with hclust function. While doing clustering it is showing an error message as "invalid distance method". I would be grateful if anyone tells how to rectify the error. Thanks in advance,   kind regards, Ms.Karunambigai M PhD Scholar Dept. of

...t be in there :- () and the archive but can't seem to find a way to make the axis values display as simply numeric (i.e., 10,100,1000, ... on the X axis and proportions on the Y axis). Suggestions much appreciated. R 2.8.1 on mac OSX 10.4.11 Don McKenzie, Research Ecologist Pacific WIldland Fire Sciences Lab US Forest Service Affiliate Professor College of Forest Resources CSES Climate Impacts Group University of Washington desk: 206-732-7824 cell: 206-321-5966 dmck at u.washington.edu donaldmckenzie at fs.fed.us

Hello everyone, when I run the "unique" command on my data frame, it deletes the majority of duplicate rows, but not all of them. Here is a sample of my data. How do I get it to delete all the rows? 6 -115.38 32.894 195 162.94 D 8419 D 7 -115.432 32.864 115 208.91 D 8419 D 8 -115.447 32.773 1170 264.57 D 8419 D 9 -115.447 32.773 1170 264.57 D 8419 D 10 -115.447 32.773 1170

Does anyone know of any R code for computing partial cross-correlation? I have examples of cross correlation functions (ccfs) that are not smooth but rather consist of a peak of several high values in consecutive lags, with sharp drops on either side. This indicates that y(t) is a function of some average of x(t-tau) at the set of lags tau over which the ccf is high. I could sort out these

Hello, I have estimated an ARIMA model and I would like to make simulations from this estimated model 1,5 and 10 steps ahead. Does anybody know how to do this? Thank You Felipe Parra [[alternative HTML version deleted]]

...(i in testfor){ + v = any(x == testfor[i]) + result[i] = v + } > > result a b c d e NA NA NA NA NA NA NA NA NA NA I would like to get.... >result TRUE TRUE TRUE FALSE FALSE Thanks, MVS ----- MVS ===== Matthew Van Scoyoc Graduate Research Assistant, Ecology Wildland Resources Department & Ecology Center Quinney College of Natural Resources Utah State University Logan, UT ===== Think SNOW! -- View this message in context: http://r.789695.n4.nabble.com/help-with-for-loop-to-test-for-a-condition-in-a-vector-tp4649213.html Sent from the R help mailing list a...

Hi, I am trying to make a scatter plot with 4 different categories using the jitter function. My code returns a variable length error and will not plot because my four categories have different numbers of samples. When I delete samples from my spreadsheet so that each of the categories has the same number of variables, it plots just fine. Is there any way to get around this and plot all of my

...ious), but can someone enlighten me as to why the behavior of this package installation is different from others? sp is listed under "Contributed packages" at the R-project URL. Thank you for your time. -- ___________________________________ Don McKenzie, Research Ecologist Pacific Wildland Fire Sciences Lab USDA Forest Service 400 N 34th St. #201 Seattle, WA 98103, USA (206) 732-7824 donaldmckenzie at fs.fed.us Affiliate Assistant Professor College of Forest Resources CSES Climate Impacts Group University of Washington dmck at u.washington.edu

Hello everyone, When I run a for loop I noticed that the looping variable gets assigned the last value in the loop: For example, if I let h=200, and I run for(i in 1:h), i gets the value 200. What's wrong here? -- -Tony [[alternative HTML version deleted]]

Hi, The first column in as.matrix(x) has extra spaces (" "), which I don't want. Is there a way not to generate those spaces? Regards, Peng > x=data.frame(x=1:10,y=letters[11:20]) > as.matrix(x) x y [1,] " 1" "k" [2,] " 2" "l" [3,] " 3" "m" [4,] " 4" "n" [5,] " 5"

I am having a hard time interpreting the phase and coherency plots. x is two timeseries that occur at the same time i.e. a b 1 11.2 12.3 16 11.3 12.4 31 11.4 12.5 46 11.5 12.6 ...etc even though my example is does not show this they are oscillating at more or less the same frequency just shifted by t=x (imagine two sine waves offset with the 2nd sine

I'm trying to do this in several ways but havent had any result. Im asked to install python, or perl.... etc. Can anybody suggest a direct, easy and understandable way? Every help would be appreciated. Thx. -- View this message in context: http://r.789695.n4.nabble.com/Export-R-dataframes-to-excel-tp3330399p3330399.html Sent from the R help mailing list archive at Nabble.com.

..., data=sample.data) than to put "sample.data$" in front of every variable name; and easier to read as well. Terry Therneau (author of coxph function) Thank you, -- Michel Kohl <><><><><><><><><><> Ph.D. Student Department of Wildland Resources Utah State University [[alternative HTML version deleted]]

This is has been bugging me for a long time. Nobody around me seems to have this problem. I hope someone on the forum could help me. When I generate a R graph and want to bring the image into Word. I cannot copy and paste it like many of my classmates can do. The "Select" in Edit menu have all options grayed out. So what I ended up doing is to save it as pdf file and bring it

Dear R experts, i have a vector z , i have to do something after z is sorted. how can i find the original index, i.e., before sorting, of a certain element in the sorted vector . thanks in advance regards ----------------------------------------------- Peng Jiang ?? ,Ph.D. Candidate Antai College of Economics & Management ???????? Department of Mathematics ??? Shanghai Jiaotong

Hi, maybe somebody would be kind enough to help a bloody and unprofessional beginner like me (and I hope I did not overlook the answer to my question on the website). I've imported a csv data frame into R, but I can't run a regression because R interprets 4 out of 5 variables as factors (rather than numeric vectors). I tried the as.numeric() command, but R says it is invalid to change the

Not sure what I'm doing wrong. Can't seem to get loess values. It looks like loess is returning the same values as the input. j <-loess(x1$total~as.numeric(index(x1) plot(x1$total,type='l', ylab='M coms/y global',xlab='') lines(loess(total~as.numeric(index(x1)),x1)) The plot statement works fine No errors with the "lines" statement But I don't

Dear all, I've tried a multiple regression, and now I want to try a cross-validation. I obtain this error (it must be sth related to df) that I don't understand, any help would be appreciated. cv.lm(df= dat, lm2.52f, m=3) Error en `[.data.frame`(df, , ynam) : undefined columns selected lm2.52f is my lm object, dat is a dataframe where the variables involved in .lm are I tried CVlm