Stefan Schmidt
2014-May-06 16:21 UTC
[R] conversion error from numeric to factor in raster: Error in 1:ncol(r) : argument of length 0, r command: as.factor()
Hello together, I was wondering how I can solve the following conversion problem of a raster file: when I try to convert the values from the raster (r) from numeric into a factor via as.factor(r) always the error appears: "Error in 1:ncol(r) : argument of length 0". r <- raster(ncol=5, nrow=5) values(r) <- 1:ncell(r) as.factor(r) Urgently I have to figure out how to convert a numeric raster into a factor raster for a predict() calculation within the raster package. Every hint is very welcome! Best, Stefan -- ******************************************************************** Stefan Schmidt Abteilung Landschafts?kologie/ Department Computational Landscape Ecology Helmholtz-Zentrum f?r Umweltforschung GmbH ? UFZ/ Helmholtz Centre for Environmental Research ? UFZ Permoserstra?e 15 / 04318 / Leipzig Phone: +49 341 235 - 1056 Fax: +49 341 235 - 1939 Email: stefan.schmidt at ufz.de WWW: http://www.ufz.de Sitz der Gesellschaft: Leipzig Registergericht: Amtsgericht Leipzig, Handelsregister Nr. B 4703 Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus Wissenschaftlicher Gesch?ftsf?hrer: Prof. Dr. Georg Teutsch Administrative Gesch?ftsf?hrerin: Dr. Heike Gra?mann
David L Carlson
2014-May-06 18:27 UTC
[R] conversion error from numeric to factor in raster: Error in 1:ncol(r) : argument of length 0, r command: as.factor()
Does values(r) <- as.factor(1:ncell(r)) do what you want? ------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 ----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Stefan Schmidt Sent: Tuesday, May 6, 2014 11:22 AM To: r-help at r-project.org Subject: [R] conversion error from numeric to factor in raster: Error in 1:ncol(r) : argument of length 0, r command: as.factor() Hello together, I was wondering how I can solve the following conversion problem of a raster file: when I try to convert the values from the raster (r) from numeric into a factor via as.factor(r) always the error appears: "Error in 1:ncol(r) : argument of length 0". r <- raster(ncol=5, nrow=5) values(r) <- 1:ncell(r) as.factor(r) Urgently I have to figure out how to convert a numeric raster into a factor raster for a predict() calculation within the raster package. Every hint is very welcome! Best, Stefan -- ******************************************************************** Stefan Schmidt Abteilung Landschafts?kologie/ Department Computational Landscape Ecology Helmholtz-Zentrum f?r Umweltforschung GmbH ? UFZ/ Helmholtz Centre for Environmental Research ? UFZ Permoserstra?e 15 / 04318 / Leipzig Phone: +49 341 235 - 1056 Fax: +49 341 235 - 1939 Email: stefan.schmidt at ufz.de WWW: http://www.ufz.de Sitz der Gesellschaft: Leipzig Registergericht: Amtsgericht Leipzig, Handelsregister Nr. B 4703 Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus Wissenschaftlicher Gesch?ftsf?hrer: Prof. Dr. Georg Teutsch Administrative Gesch?ftsf?hrerin: Dr. Heike Gra?mann ______________________________________________ R-help at r-project.org mailing list 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.