parfor with progress report
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I would like my parfor loop to count how many of the indices have been handled and display this information during the computations. However, the first code below does not work as MATLAB forces $c$ to be temporary and the second does not work because MATLAB seems to create independent copies of the counting object for each worker.
First try:
c=0; A=zeros(10,1); parfor i=1:10 A(i)=foo(i); c=c+1; c/10 end
--> Error when trying to run, because c is uninitialized.
Second try:
classdef progress <handle properties N; c; end methods function obj=progress(N) obj.N=N; obj.c=0; end function count(obj) obj.c=obj.c+1; fprintf('%f',obj.c/obj.N); end end methods(Static) function test() c=progress(10); parfor( i=1:10,3) c.count(); end end end end
--> Output:
>> progress.test() 0.1000000.2000000.300000 0.1000000.2000000.3000000.400000 0.1000000.2000000.300000
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