vector manipulations
Did you read the help page for 'outer'?
?outer
It says
'FUN' is called with these two extended vectors as arguments.
Therefore, it must be a vectorized function (or the name of one),
expecting at least two arguments.
I don't think your logl function is vectorized according to your summary
of what you did.
Pete Dorothy wrote:
Hello, I have simulated a set of data which i called "nir" (a vector). I have created a function "logl" which calculates the log-likelihood. logl is a function of 2 real parameters : "beta" and "zeta" (of length 1). This function works perfectly well when I try for example "logl(0.1,0.2)" Now if I try : "x=seq(0.1,0.5,by=10^(-1)) y=seq(0.1,0.5,by=10^(-1)) z=outer(x,y,logl)" I get an error. The problem seems to be that inside "logl", the following expression is calculated : "sum( log( beta+(nir-1)*zeta ) )". So it is a vector manipulation. The error tells me that "nir" is not the size of "zeta". Yet usually it is no problem since "length(zeta)=1". When I replace "sum( log( beta+(nir-1)*zeta ) )" by a loop, I get no mistake. But I think it slows down the program. Do you have an idea where the problem is ? Thank you very much. [[alternative HTML version deleted]]
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