Displaying 7 results from an estimated 7 matches for "eugeniusz".
2010 May 21
1
GPS finding and mark interesting POI within table with large GPS points collection
Dear R users,
#----------------------------------------------------------------------------------------------------------------------------
#There is table containing 1000 (lat, lon, time) GPS positions, wchich should be recognized and labeled in every row of that #recognized position by label from defined POI vector
GPS$Lat =c(9,2.2,2,3,4,5,6,7,2,9,2.1,10,3.3,0 , 6, 8, 9)
GPS$Lon =c(0,1
2011 Jul 28
0
_: how to replace values in x by means in subgroups created in ...(not loops)
....names(r18) <- NULL
#all.equal(r18, s18)
#---------------------------------------------------------------------
#_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_#
-----Wiadomo¶æ oryginalna-----
>Od: ONKELINX, Thierry [mailto:Thierry.ONKELINX@inbo.be]
>Wys³ano: ¦r 2011-07-27 11:36
>Do: Eugeniusz Ka³u¿a; r-help@r-project.org
>Temat: RE: how to replace values in x by means in subgroups created in ...(not loops)
>
>Something like this?
>
>dataset <- data.frame(x = x, y = y)
>dataset$Group <- cumsum(c(0, diff(!is.na(dataset$y) & dataset$y == 0)) == 1)
>library(p...
2010 Jun 24
1
?to calculate sth for groups defined between points in one variable (string), / value separating/ spliting variable into groups by i.e. between start, NA, NA, stop1, start2, NA, stop2
Dear useRs,
Thanks for any advices
# I do not know where are the examples how to mark groups
# based on signal occurence in the additional variable: cf. variable c2,
# How to calculate different calculations for groups defined by (split by occurence of c2 characteristic data)
#First example of simple data
#mexample 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
2011 Jul 27
1
how to replace values in x by means in subgroups created in ... (not loops)
# Dear all,
# how to replace values in x by means in subgroups created in ...
# replace only these values where y=0 in continous sequence
# replace by mean calculated locally for each subgroup created by
# continous sequence of 0,0,0 in parallel y vector, i.e.
# where there is continous sequence of 0 in data frame vector y
# but we do not replace values in x[i], if y[i]!=0
# we do not want
2010 May 22
1
How to find all single minima, i.e. only each one within each next part of analyzed vector (table)
Dear R users,
How to find all single minima within each next part of analyzed vector (table)
Select all minima (mass_value=min & mass_value<2)
(many) in vector(table),
BUT first put mask on table in order to select
within one window mask (5 elements) only one local minimum, and next to search within
the next time window mask the second minimum (only one local along second mask)
2012 Mar 26
0
filter and merge 2 big Df's by=t_chr in sec.
Please help to solve that problem:
filter and merge 2 big Df's by=t_chr in sec.
require(zoo)
t1="2012-03-25 17:00:00.0"
t2="2012-03-25 17:00:05.0"
t1_POSIXlt<-strptime(t1, "%Y-%m-%d %H:%M:%OS")#
t2_POSIXlt<-strptime(t2, "%Y-%m-%d %H:%M:%OS")#
# ts_t1t2_POSIXlt<-seq(t1_POSIXlt,t2_POSIXlt,length.out
2011 Jul 01
0
How to filter XY pairs of inacurate gps position along track, taking into account the time index to not mix track from different days in one average track
Dear R users,
subject: How to filter XY pairs of inacurate gps position along track, taking into account the time index to not mix track from different days in one average track
or subject as: How to filter XY pairs of inacurate gps position: (latitude, longtitude)
to get estimated correct position before calculating track
i.e.
How to estimate (time series? )?
How to filter XY pairs of