MATLAB: Multi-level indexing

multi-level indexingscalar index

Hi! I have this structure "result.pops(1:1000,1:20).obj(1:2)"

I want to make addition of 2 value (obj(1) + obj(2)), of all pops file. I expect a matrix size 1000×20 where each case are sum of obj 1 and 2… I get this error " Scalar index req. for this type of multi-level indexing"

I usualy use "For" loop to execute the job but I want to learn the good way to make it faster

Thank you for your suggestion!

Best Answer

struct2cell(), cell2mat(), sum() on the appropriate dimension.

Related Solutions

MATLAB: Classdef get methods: allowing get indexing into an array of length either (1×1) or (Nx1).

You would need to overload subsref, e.g.,

methods
 function out=subsref(obj,S)
   if S(1).type=="." && S(1).subs{1}=="A" && numel(S)>1 
       
       out=obj.A(min(S(2).subs{1},1));
   else
       error 'Undefined Indexing'
   
   end
  end
end

MATLAB: Multi-level parallelization

MATLAB does not support multiple parallel pools in the same session. With that said, as you've pointed out, batch will do what you want and has almost the same signature as runCodeInBackground.

result1 = runCodeInBackground(pool1, "myCode", parameterForParametricStudy(1));

versus

job1 = batch("myCode", nout, {parameterForParametricStudy(1)}, 'Pool',12);

Where nout is the number of output arguments of myCode you want returned.

Best Answer

Related Solutions

MATLAB: Classdef get methods: allowing get indexing into an array of length either (1×1) or (Nx1).

MATLAB: Multi-level parallelization

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