Hello,
Thanks a lot for your answers. Finally, I'm using the function system2() to run the python script. However, I don't know how to define a list of numeric values in the character vector of arguments for the function system2 (i.e., in �args� of the function system2() ) ? In the Python script, the list of numeric values is defined as follows: import sys import nlmpy weights = sys.argv[1] ## where weights = [0.5, 0.5] outputNLM = nlmpy.classifyArray(�, weights) print outputNLM In the script R, how can I specify the argument weights = [0.5, 0.5] to run the Python script ? Thanks a lot for your time. Have a nice day Nell ________________________________ De : Robert Baer <rb...@atsu.edu> Envoy� : samedi 19 novembre 2016 16:05:13 � : David Winsemius; Nelly Reduan Cc : r-help@r-project.org Objet : Re: [R] Run a Python code from R >From https://www.r-bloggers.com/rpithon-vs-rpython/ <https://www.r-bloggers.com/rpithon-vs-rpython/>"Similar to rPython, the rPithon package (http://rpithon.r-forge.r-project.org) allows users to execute Python code from R and exchange the data between Python and R. However, the underlying mechanisms between these two packages are fundamentally different. Wihle rPithon communicates with Python from R through pipes, rPython accomplishes the same task with json. A major advantage of rPithon over rPython is that multiple Python processes can be started within a R session. However, rPithon is not very robust while exchanging large data objects between R and Python." On 11/16/2016 7:10 PM, David Winsemius wrote: On Nov 16, 2016, at 4:53 PM, Nelly Reduan <nell.r...@hotmail.fr><mailto:nell.r...@hotmail.fr> wrote: [[elided Hotmail spam]] I 'm trying to use the package "rPithon" but I obtain this error message: Are you sure you are not just misspelling rPython? If that's not the issue than you need to say where you got rPithon, >From https://www.r-bloggers.com/rpithon-vs-rpython/ "Similar to rPython, the rPithon package (http://rpithon.r-forge.r-project.org) allows users to execute Python code from R and exchange the data between Python and R. However, the underlying mechanisms between these two packages are fundamentally different. While rPithon communicates with Python from R through pipes, rPython accomplishes the same task with json. A major advantage of rPithon over rPython is that multiple Python processes can be started within a R session. However, rPithon is not very robust while exchanging large data objects between R and Python." On Wed, Nov 16, 2016 at 4:53 PM, Nelly Reduan <nell.r...@hotmail.fr><mailto:nell.r...@hotmail.fr> wrote: Hello, How can I run this Python code from R ? import nlmpy nlm = nlmpy.mpd(nRow=50, nCol=50, h=0.75) nlmpy.exportASCIIGrid("raster.asc", nlm) Nlmpy is a Python package to build neutral landscape models https://pypi.python.org/pypi/nlmpy . The example comes from this website. I tried to use the function system2 but I don't know how to use it. path_script_python <- "C:/Users/Anaconda2/Lib/site-packages/nlmpy/nlmpy.py" test <- system2("python", args = c(path_script_python, as.character(nRow), as.character(nCol), as.character(h))) Thanks a lot for your help. Nell nlmpy 0.1.3 : Python Package Index<https://pypi.python.org/pypi/nlmpy><https://pypi.python.org/pypi/nlmpy> pypi.python.org NLMpy. NLMpy is a Python package for the creation of neutral landscape models that are widely used in the modelling of ecological patterns and processes across ... [[alternative HTML version deleted]] David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org<mailto: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. [[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.
