Dear all,

again i have a problem with special case of dropping lines out of a  
matrix.

i tried the following, where throwout is a vector of length 18 with  
simple id values that should be compared to any

for (k in 1:length(throwout))
{
mymatrix=matrix(mymatrix[-(forfact[k]),],ncol=4)	
	}


this didnt work and i tried the following to find the error:

mymatrix[,1][mymatrix[,1]==throwout[7]]
this returned me a nice value - everything fine...
but other same other values for throwout didnt work - because the  
throwout value simply is not in this matrix.
but i need the same throwout vector for different matrices - so i  
need to use it.

does anybody have an idea how i can throw out all lines in every of  
my 5 matrices that contain values of the throwout in their first  
column ?
and how to deal with the problem that not every matrix contains all  
throwout values in its first column...

maybe this might help:
in the end all matrices should have the same number of lines.



thx in advance, i´ll keep on trying ;)



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