Hi, my name is Ellen. I want to ask you about R Code.
I got a code for extracting a pixel value, but I can't compile it..
It is said Error in is.data.frame(x) : object 'lena' not found
Here is the original full code:
library(pixmap)
lena - read.pnm(oldlennablur.pgm)
You seem to be quite lost. You should execute one statement at a time, and
troubleshoot from there. I suspect that your attempts to get your file in the
right place went wrong, or the file is the wrong type of file for that function
(regardless of the name you gave it).
As for giving you an
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