Dear Dan, Apologies for not responding quickly.
I will look into Bioconductor. I assume I can easily change the data attached to nodes and arcs. I have used R for 1 1/2 years and this computing language has grown on me more and more! I migrated from Matlab. Now a challenge is how to export network datasets readable into Bioconductor... Thank you very much!!! Taka Dan Bebber wrote: > Dear Taka, > > Anything is possible on R! > I do all my shortest path calculations with RBGL and graph packages from > Bioconductor. > RBGL (based on the C++ Boost Graph Library) has several shortest path > algorithms that perform better on graphs of different types. > I usually use the johnson.all.pairs.sp() function > http://www.bioconductor.org/packages/release/GraphsAndNetworks.html > > > Yours, > Dan Bebber > _________________________________________ > Dr Daniel P Bebber, MA, DPhil > > Head of Climate Change Research > Earthwatch Institute > > Junior Research Fellow in Biology > St. Peter's College, University of Oxford > > Earthwatch Institute (Europe) > 267 Banbury Road > Oxford OX2 7HT > UK > T. +44(0)1865 318842 > F. +44(0)1865 311383 > [EMAIL PROTECTED] > www.earthwatch.org > > > On Thu, 13 Sep 2007, Takatsugu Kobayashi wrote: > > >> Hi, >> >> I would like to know if there are packages to compute shortest network >> path distances, something that can be down on TransCAD and ArcGIS >> network analyst. I have cencus tract centroids and network line >> shapefiles for 126 US urbanized areas. Basically, I would like to move >> the census tract centroids a bit to see how much it changes the shortest >> path distances. >> > > _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
