Hi everyone, I am a new PDL user and this is my first post to this list. I am delighted with the power and flexibility of PDL and would like to use it more often in my everyday work and modelling. I am now writing in the hope that someone can give some advice on the following problem:
I have some m x 1 piddles representing values of different parameters along a profile. As everyone in this list knows, PDL is very good at doing maths in a one-to-one fashion, i.e. between cells with the same index value. However, this time I need to calculate values using different indexes, i.e.: a(i) = [ b(i-1) - b(i+1) ] / dx I would normally do this by operating inside a loop using standard Perl arrays, but this time it will more convenient for me to use PDL piddles and I therefore wonder if it would be possible to use a built-in function that will allow me to do such calculations without invoking loops. I have already looked at the documentation (PDL::Indexing but I did not manage to figure out a solution, so any hint will be appreciated. Thanks Hernán -- Hernán De Angelis Linux user # 397217 _______________________________________________ Perldl mailing list [email protected] http://mailman.jach.hawaii.edu/mailman/listinfo/perldl
