Hi all, is there any R function that loads a bmp file, or any other format, and converts its grid of pixels into a matrix or data frame? Thanks in advance. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://stat.ethz.ch/pipermail/r-help/attachments/20000628/f3fc8b21/attachment.html
Try the pnm() function in the e1071 library (can't remember if it's included by default, you may have to grab it from CRAN) On Wed, 28 Jun 2000, Manuel Castejon Limas wrote:> Hi all, is there any R function that loads a bmp file, or any other > format, and converts its grid of pixels into a matrix or data frame? > Thanks in advance. >-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
On Wed, 28 Jun 2000, Manuel Castejon Limas wrote:> Hi all, > is there any R function that loads a bmp file, or any other format, and converts its grid of pixels into a matrix or data frame?Almost certainly not (they are binary files) but netpbm and ImageMagick and such programs have means to convert the files to an ASCII gird of numbers, which R can read easily. That's mainly how we do it. For really big image files, I wrote a C interface that reads the file and fills a pre-allocated array. -- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
I really appreciate your incoming messages. Thanks a lot for the information about the image loading procedures. They will be of great help. Manuel. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://stat.ethz.ch/pipermail/r-help/attachments/20000629/368c7324/attachment.html