How can I write simulations in Erlang?
- by rick
Hi guys,
I want to do some numerical stuff in Erlang like this:
You've got an array with the following values:
[2,3,4]
In each iteration, you calculate
0.1 * [n-1] + 0.7 *[n] + 0.2 * [n+1]
This becomes the new [n].
If n == 0 then [n-1] = 0. If [n] == length of array then [n] = 0.
So I try an example:
[2,3,4]
calculations:
0.1 * 0 + 0.7 * 2 + 0.2 * 3 = 2
0.1 * 2 + 0.7 * 3 + 0.2 * 4 = 3.1
0.1 * 3 + 0.7 * 4 + 0.2 * 0 = 3.1
So [2,3,4] becomes to [2, 3.1, 3.1] after one iteration.
I know how to write this in a non-functional language like C.
But I have difficulties to imagine, how this could be done in Erlang.
I found some tutorials on how you read a file to a list. So this
is not the problem.
How can I spawn different Erlang processes that each process has one element of the list?
How can I do calculations by communicating with 'the neighbors', so that the neighbors know where their neigbors are generically, without specifying each?
How can I collect the data into a list?
Eventually, is it possible to solve that problem in Erlang at all?
Thanks for your help.
