I'm trying to do some sort of "floodfill" or "seedfill" with data stored within a matrix in R (usually floating numbers), where a marker value is given to specify the limits of an area to be filled. A reduced example may demonstrate this below. Although I wrote a simple C function for this, it would be very helpful to find a more professional solution.
Any suggestions or code snippets are greatly appreciated.
Thomas Petzoldt
--------------------------------------------------------------------------
The problem:
## (1) Given the following matrix
z <- matrix(c(0,0,0,0,0,0,
0,1,1,1,1,0,
0,1,0,0,1,0,
0,1,1,1,1,0,
0,1,0,0,1,0,
0,1,0,1,1,0,
0,0,0,0,0,0), nrow=6, ncol=7)
image(z)## (2) _a_procedure_is_wanted to # "floodfill" all zeroes with 2 "outside 1" # to give
## (3) the following result:
z <- matrix(c(2,2,2,2,2,2,
2,1,1,1,1,2,
2,1,0,0,1,2,
2,1,1,1,1,2,
2,1,2,2,1,2,
2,1,2,1,1,2,
2,2,2,2,2,2), nrow=6, ncol=7)image(z)
______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
