Edward Chen wrote:
Hi,
I tried looking through google search on whether there's a way to
computer
the median for each row of a nxn matrix and return the medians for
each row
for further computation.
And also if the number of columns in the matrix are even, how could I
specify which median to use?
Hi Edward,
You can get the default row medians by transposing the matrix and
sending it to the "describe" function in the prettyR package:
describe(t(my.matrix),num.desc="median")
For choosing different methods of calculating the median, you can write
a wrapper for the "quantile" function:
new.quantile<-function(x,na.rm=TRUE)
return(quantile(x,probs=0.5,type=n,na.rm=na.rm))
describe(t(my.matrix),num.desc="my.median")
where "n" is the type of median calculation you want (see the help for
quantile).
Jim
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