What have you tried so far? Have you installed the spatstat package and read the manual page for pp3 objects? The website spatstat.org has additional support including a quick reference guide. There are always multiple ways to do something in R, but without more details it is hard to be specific. Nearest neighbor distances are also provided in several other packages, e.g. packages FNN, distances, and RANN.
---------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77843-4352 -----Original Message----- From: R-help <r-help-boun...@r-project.org> On Behalf Of Eric Leroy Sent: Wednesday, February 6, 2019 2:37 AM To: r-help@r-project.org Subject: [R] Nearest neighbors of a of 3D points Hi, I have a text file that contains the 3D coordinates of points and I want to plot the histogram of the nearest neighbors distance. I can import the xyz coordinates in R and each value x, y, z is stored in a numerical array. I discovered the nndist.pp3 function from the spatstat package that seems to do what I want. My problem is to create a pp3 object from the xyz values that I have. Do you know how to do that ? Best regards, -- *Eric Leroy* /Responsable de la plateforme microscopie électronique/ ICMPE - UMR 7182 - CNRS - UPEC 2/8, rue Henri Dunant 94320 Thiais Tél : 01.49.78.12.09 Fax : 01.49.78.12.03 courriel : eric.le...@icmpe.cnrs.fr <mailto:eric.le...@icmpe.cnrs.fr> Page Web : : http://www.icmpe.cnrs.fr [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
