search for: occurrence

Hello everyone, I am currently working with some data where I need to select the first occurrence of a value after the occurrence of another value. The data has two columns, one with a time and one with occurence of certain events. The column of data I want to select from looks like this (and each of these events have a corresponding time in another column). Stat71 OutMag FirstResp InMag...

...erboard with indexes. Does MySQL usually use only one index per query and simply match keys on the results of the indexed first part? For example: DELETE FROM tokens WHERE 6813946236211560448 <= fnv AND fnv < 6818449835838930944 AND updated_at<''2010-06-20 14:08:55'' AND occurrences=0; If I understand correctly from the output of: EXPLAIN SELECT * FROM tokens WHERE 6813946236211560448 <= fnv AND fnv < 6818449835838930944 AND updated_at<''2010-06-20 14:08:55'' AND occurrences=0; only the index on fnv is used (there are indexes on updated_at and occu...

Hi everyone, I have an array with a variable called comments. I wish to count the number of subjects whose post-experiment comments contain a string x and then cross tab this with other variables of interest, ex. age. Does anyone have any suggestions on how to count unique occurrences of a string embedded within a variable and cross-tab it with other variables? I've looked through the help files, etc. One method I tried was to use strsplit to split comments. I can use this with table to count the number of occurrences of x, but I can't cross tab this with other variabl...

Hello, I am trying to use R to download a bunch of .csv files such as: http://biocache.ala.org.au/ws/occurrences/download?q=Banksia+ericifolia I have tried the following and neither work: a<- getURL(" http://biocache.ala.org.au/ws/occurrences/download?q=Banksia+ericifolia") Error in curlPerform(curl = curl, .opts = opts, .encoding = .encoding) : embedded nul in string: and a<-httpPOST(&...

Hello all, I'm new in R, and I have a data-frame like this (dput information below): Specie Fooditem Occurrence Volume 1 Schizodon vegetal 1 0.05 2 Schizodon sediment 1 0.60 3 Schizodon vegetal 1 0.15 4 Schizodon alga 1 0.05 5 Schizodon sediment 1 0.90 6 Schizodon sediment 1...

Hi, i get the next problem when i try with Alsa sound Driver. I get a sound on a lot of parts... OS: GNU/Linux Ubuntu 6.10 Linux maximi89-desktop 2.6.17-50-386 #2 Tue Jan 23 16:48:16 UTC 2007 i686 GNU/Linux 00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2) maximi89@maximi89-desktop:~$ WINEDEBUG=err wine '/home/maximi89/.wine/drive_c/Archivos

Hi all, I am currently trying to compare different plant occurrence prediction maps generated in R and exported into GRASS. One of these maps was generated from a glm fitted to some data, and subsequently applying this glm model to a wider region using predict.glm. The outcome here was a probability of occurrence. The second map I generated using a gam (mgcv),...

...r2,var3,var4 a,b,b,a b,b,c,b c,a,a,a a,b,c,c b,a,c,a c,c,b,b a,c,a,b b,c,a,c c,a,b,c" DF <- read.table(textConnection(x), header=T, sep=",") DF and I would like to sum all the combinations/occurences by a factor (letter in this case) between variables and produce a list of "occurrence" matrices. For example in this case the "occurrence" matrix (first element of list) for factor "a" should look like this >occulist $a var1 var2 var3 var4 var1 x 0 1 1 var2 0 x 1 2 var3 1 1 x 1 var4 1 2 1 x $b etc. because there is two rows where var2 and var4 has &qu...

Hi, That sounds simple but I cannot think of a really fast way of getting the following: c(1,1,2,2,3,3,4,4) would give c(1,3,5,7) i.e., a function that returns the indexes of the first occurrences of numbers. Note that numbers may have any order e.g., c(3,4,1,2,1,1,2,3,5), can be very large, and the vectors are also very large (which prohibits any loop). The best I could think of is: tmp = c(1,1,2,2,3,3,4,4) u = unique(tmp) sapply(u, function(x){ which(!is.na(match(tmp,x)))[1]} ) But th...

Hi list, based on the following data.frame I would like to create a variable that indicates the number of occurrences of A in the 3 years prior to the current year: DF = data.frame(read.table(textConnection(" A B 8025 1995 8026 1995 8029 1995 8026 1996 8025 1997 8026 1997 8025 1997 8027 1997 8026 1999 8027 1999 8028 1995 8029 1998 8025 1997 8027 1997 8026 1999 8027 1999 8028 1995 8029 19...

Hi everyone, I need your help to solve a problem with occurrence and two dataframes. I have an excel table of 15200 lines. Each line correspond to a tree analyzed for its structures. I have all the structures in columns (48 structures). The occurrence of these structures has been counted on every tree. For example, the tree 12607 has 3 structures CV11, 1 structu...

Dear all,   i would like to count the number of times where I have combined occurrences of the categories of 2 variables.   For instance, in the dataframe below, i would like to know how many times each author (au1, au2, au3 represent the first, second, third author) is associated with each of the category of the variable 'nam'. The position of the author does not matter.   n...

...king into adding support for that > instruction to the fast path. >From a bytecode file that disassembles into a 240K lines LLVM assembly file, -fast-isel-verbose outputs ~7600 missed instructions. There are lots of loads/stores of boolean values (i1), bitcasts and calls. store i1 : 1802 occurrences (23%) load i1* : 1076 occurrences (13%) call : 2590 occurrences (34%) bitcast : 1848 occurrences (24%) Almost all the calls have void return value and use the sret attribute. I can send the bytecode file to anyone interested. -- Óscar

Dear all, I have a dataframe with two columns, where NUMBER is the number of occurrences of DEPTH: DEPTH NUMBER 1 2 1 2 3 2 3 2 3 4 5 1 > a<-data.frame(c(2,3,2,5),c(1,2,3,1)) > colnames(a)=c("DEPTH","NUMBER") I want a column or a vector where all the DEPTHs are listed: 2, 3, 3, 2, 2, 2, 5 (NUMBER=1 in all cases)....

Hello again, I was looking for some way on How to delete repeated appearance in a String. Let say I have following string: Text <- "ahsgdvasgAbcabcsdahj" Here you see "Abc" appears twice. But I want to keep only 1 occurrence. Therefore I need that: Text_result <- "ahsgdvasgAbcsdahj" (i.e. the first one). Can somebody help me if it is possible using some R function? Thanks and regards,

Is there any way you could get the number of occurrences of the search in one hit? In a result I get the ferret_rank and ferret_score but not how many hits the search generated in the current record. I would also like to be able to sort after this when I search. /mattias -- Posted via http://www.ruby-forum.com/.

Hi there, I am interested if there is anyway to keep track of the occurrence of warning message. I know that warnings will only be printed out at the end of the program if warn=0. However I am also interested at which particular set of data does the warnings occur too. This is because I am running 1000 data, so if there are 2 or 3 data that give warnings, I would like to...

...of coin tosses, "Heads then Tails", or "Heads then Heads"? ##generate 2500 strings of random coin flips ht <- replicate(2500, paste(sample(c("H", "T"), 100, replace = TRUE), collapse = "")) ## find first occurrence of HT mean(regexpr("HT", ht))+1 #mean of HT position, 4 ## find first occurrence of HH mean(regexpr("HH", ht))+1 #mean of HH position, 6 FYI, this is not homework, I have not been in school in years. I saw a similar problem posed in a blog post on the Revolutions R blog...

I am currently testing species co-occurrence patterns using null models and the oecosimu() function within the vegan() package. My issue is that none of the methods appear to be the ones that I want. The methods listed are r0, r1, r2, r2dtable, swap, tswap. However, I want to know how to go about implementing fixed row algorithms, as suggeste...

Hi all, If the question below as been answered before I apologize for the posting. I would like to get the frequencies of occurrence of all values in a given variable in a multivariate dataset. In short for each variable (or field) a summary of values contained with in a value:frequency pair, there can be many such pairs for a given variable. I would like to do the same for several such variables. I have used table() but am unab...