search for: lanikpeter

Displaying 5 results from an estimated 5 matches for "lanikpeter".

2009 Feb 24
4
bigest part of vector
Hi, may be simle question, but a do not find it anywhere. Is there same function like max() ,but giving more results. max() give 1number-maximum I need funcion what give p bigest number. many thanks -- View this message in context: http://www.nabble.com/bigest-part-of-vector-tp22188901p22188901.html Sent from the R help mailing list archive at Nabble.com.
2010 Jun 09
1
counting across leves of factors
I have dataframe with 17factors variables (for example every factor have 3levels) I have maybe 5000 observation. And i need to do table where is in every raw 1 of possible combination of this factors and the numbur how many time is this combination in my dataset. I wrote one code, but this is very slow and dumb. it looks like this: i<-0 for(i1 in levels(hivdat$pohl)){
2010 Jul 02
0
GMM with covariance moment condicion
hello I have covariance stacionary proces, and i want to estimate some parameter of this proces via gmm. My problem is with write "g" -function. 0 order autocovariance is not problem 1 and higher order autocavariance are problem, because add order from 0 mean that I "loose" one "observacion" if I have 100 observation and i am going to use mean, variance and first
2009 Feb 27
3
rounding problem
hi i am creating some variables from same data, but somewhere is different rouding. look: P = abs(fft(d.zlato)/480)^2 hladane= sort(P,decreasing=T)[1:10]/480 pozicia=c(0,0,0,0,0) for (j in 1:5){ for (i in 2:239){ if (P[i]/480==hladane[2*j-1]){pozicia[j]=i-1}}} period=479/pozicia > P[2]/334 [1] 0.0001279107 > hladane[1] [1] 0.0001279107 > P[2]/334==hladane[1] [1]
2010 May 02
3
help with tapply or other apply
Hi, my data looks this: id forma program kod obor rocnik 1 10001 kombinovan? Matematika M1101 matematika 1 2 10002 prezen?n? Informatika N1801 teoretick? informatika 1 3 10002 prezen?n? Informatika B1801 obecn? informatika 3 4 10003 prezen?n? Informatika M1801 softwarov?