MATLAB: Making copies of functions with different workspaces

Question

How to call the same function in different workspaces?

I tried using handle but it doesn't work:

myaccum.m

function y = myaccum(x)
	persistent buf;
	if isempty(buf)
		buf = 0;
	end
	buf = x + buf;
	y = buf;
end

call.m

accum1 = @myaccum;
accum2 = @myaccum;
for i=1:10
	out1(i) = accum1(2);
	out2(i) = accum2(3);
end
display([out1; out2]);

Result:

>> call
     2     7    12    17    22    27    32    37    42    47
     5    10    15    20    25    30    35    40    45    50

Need:

>> call
     2     4     6     8    10    12    14    16    18    20
     3     6     9    12    15    18    21    24    27    30

Answer 1

I recommend using a classdef, but this method using Nested Functions would also work:

function test
    accum1 = getAccum;
    accum2 = getAccum;
    
    for i=1:10
        out1(i) = accum1(2);
        out2(i) = accum2(3);
        
    end
    
    disp([out1; out2]);
end
function h=getAccum
    h=@myaccum;
   
    buf=0;
    function y = myaccum(x)
        buf = x + buf;
        y = buf;
    end
end