multiplying 2 arrays in codesys

2022-08-29T21:22:25.521000Z

Initializing to zero is always a good idea to be sure variables are empty before a calculation.

2022-08-29T20:41:00.050000Z

Do i need to initialise C[k,i] to 0's?
Something like this:
c: array [1..5,1..5] of real := [25(0)];

2022-08-27T18:01:20.129000Z

Okay so here is the loop(s) needed for the calculation:

for i := 1 to 5 do
  for j := 1 to 5 do
    for k := 1 to 2 do
      c[k,i] := c[k,i] + (a[k,j]*b[j,i]);
    end_for;
  end_for;
end_for;

2022-08-22T09:27:08.386000Z

Yes sorry C would be a new array. I want something like this c=a*b; I have edited the original problem statement.

2022-08-18T10:45:58.559000Z

But C would be a new array, or do you want the array elements of C summed up?

2022-08-18T08:47:08.990000Z

I wanted to multiply the matrix a and matrix b which yields the result c = a*b.

2022-08-18T06:21:02.036000Z

Maybe i do not understand how you want them multiplied?
I was thinking of something like this:

c := 1;
for i := 1 to 2 do
  for j := 1 to 5 do
    c := c * a[i] * b[i];
    end_for;
end_for;

2022-08-17T10:37:05.197000Z

I am not able to identify what you are trying to tell, would be great if you can explain.

2022-08-09T08:47:31.964000Z

Since you already got the values in arrays cant you just loop through them?

2022-08-08T18:29:03.778000Z

I don't know of another way. I guess you could find an algorithm and convert it manually to IEC 61131-3.

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