Displaying 9 results from an estimated 9 matches for "crema".
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crea
2009 Mar 21
3
Retrieving Vertices Coordinates from SpatialPolygons
...s stored in the "coords" slot, but I can't get access to
it! I tried to coerce the SpatialPolygon into a data.frame but it
doesn't work. Want I want is just a list of x and y coordinates of my
polygon vertices without doing the workflow in GRASS!!!
Thanks very much!
Enrico Crema
---------------------------------------
Enrico R. Crema
PhD Candidate
Institute of Archaeology, UCL
AHRC Centre for the Evolution of Cultural Diversity
+44 7899093191
http://www.cecd.ucl.ac.uk/people/?go1=91
e.crema@ucl.ac.uk
enrico.crema@gmail.com
[[alternative HTML version deleted]]
2009 Dec 11
1
how to simulate brown, white and pink noise time series
Dear List,
Is it possible to simulate a time-series in R based on 1/f noise?
Many Thanks
Enrico Crema
---------------------------------------
Enrico R. Crema
PhD Candidate
Institute of Archaeology, UCL
AHRC Centre for the Evolution of Cultural Diversity, UCL
Centre for Advanced Spatial Analysis, UCL
Personal Webpages:
http://www.cecd.ucl.ac.uk/people/?go1=91
http://www.casa.ucl.ac.uk/people/person...
2010 Oct 28
3
0.3 is not 0.3, bug in seq() function?
Dear List,
I've been running a numerical simulation and I found this odd error in my code where the which command could not identify which rows of a column of data.frame were corresponding to the value 0.3. There are 7 unique values in this column (0.01,0.05,0.1,0.2,0.3,0.4,0.5), and this does not work only for 0.3. So I looked at the column and manually tried to use the which() command, and
2010 Dec 20
4
Time Series of Histograms
Dear List,
I have a set of distributions recorded at an equal interval of time and I would like to plot them as series of horizontal histograms (with the x-axis representing time, and y-axis representing the bins) since the distribution shifts from unimodal to multimodal in several occasions. What I would like to see is something close to a violinplot, but I do not want a kernel density
2000 Apr 04
0
stochastic process transition probabilities estimation
...taking the factors of Y_t and of its margin without
the first component I think I'm done. Unfortunately, factor, sort,
unique all work only with univariate data.
Any other suggestion will be very appreciated...
Best regards, Massimo
--
Dr. Massimo Santini
Tel. Milano +390255006278, Crema +390373898227; Fax. +390255006373
<mailto:santini at dsi.unimi.it> <http://zorn.usr.dsi.unimi/~santini/>
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info&q...
2013 May 01
1
selecting rows based on multiple criteria
Dear List,
I am struggling with the following problem.
Suppose I have the following data.frame:
coord<-expand.grid(x=1:10,y=1:10)
and I want to extract the row numbers of those matching the criteria defined by the following data.frame:
choice<-data.frame(x=c(2,1,2),y=c(1,2,2))
the result should return in this case:
2,11,12
All I managed to do is the following:
which(data
2010 Dec 19
3
monthly median in a daily dataset
Hello,
I have a multi-year dataset (see below) with date, a data value and a flag
for the data value. I want to find the monthly median for each month in this
dataset and then plot it. If anyone has suggestions they would be greatly
apperciated. It should be noted that there are some dates with no values and
they should be removed.
Thanks
Emily
> print ( str(data$flow$daily) )
2007 Aug 13
0
Reading polygon shapefiles in splancs
Dear List,
I'm trying to import a multiple polygon shapefile in splancs. I've found the following command but it seems to work only for single polygons:
Name_of_splancs_polygon<-getPolygonCoordsSlot (getPolygonsPolygonsSlot(getSpPpolygonsSlot(name_of_sp_polygon) [[1]]) [[1]])
I've tried to change the numbers but it seams to choose polygons instead of importing them
2005 Nov 03
1
Problem with wine (characters)
Hi,
I'm using wine 0.9 just updated with debian. When I use it, I get no
error but the windows appear like this (teleport pro with wine):
http://img129.imageshack.us/my.php?image=wine5qf.png
I can't use it!
Does anyone have a solution?
Thanks