How to pass a function to Parallel Assign()?

Question

Hi everybody,

I am trying to pass a function to the local memory space of the Parallel Assign function:

F = Function( {x,y}, x+y);
M = J(2,3,0);
Parallel Assign({F=F},M[i,j]=F(i,j));
M;

It does not work because JMP tells me F has 2 parameters but 0 were given. How can I fix this?

Of course it is a boiled down problem of a much longer script. I could define F inside Parallel Assign, but it is unnecessary to define one and the same function in each of my n execution (n is large). Is there a way to hand over a function to Parallel Assign?

Robbb · Answer

Thanks. So with Parallel Assign( {F = Function( {x,y}, x+y)}, M[i, j] = F( i, j ) );

M = J(2,3,0);

I can define a function once for Parallel Assign. But is it possible to do it outside the Parallel Assign statement? What if I want to use one and the same function inside and outside Parallel Assign? Do I really have to define it twice?

In general, if I have a function F, is it possible to assign the same function to G (of course without redefining it)? G=F does not work, since JMP expects the parameters of F.

Craige_Hales · Answer

See example and explanation https://community.jmp.com/t5/Discussions/Multithreading-troubleshooting-using-Parallel-Assign/m-p/230644#M45738