Hi,I have a following script mu_B=zeros(1,21); for i=1:21 count=i; for j=1:125 mu_B(i)=mu_B(i)+a(j)*R(count); count=count+21; end end created in LabVIEW like this, Not Getting required results and still I am not being able to figure out whether it's an exact equivalent of the script mentioned afore. Need Help. Regards.

Your script describes a matrix multiplication, mu = R*a, where mu is a (column) vector of 21 elements, R is a matrix of 21 rows and 125 columns, and a is (column) vector of 125 rows. In your case, R is a 1D array, so we need to turn it into a 2D array with 21 rows and 125 columns. Once we do this, the problem is very simple to solve. It will be a good exercise for you to do this for yourself (and we'll help, if you get stuck). There's a function on the Array palette called Reshape Array -- wire R in on the left, and your two indices, 21, then (pull down) 125), and you'll get the 2D form of R on the output. Bring R into a For loop -- do you notice the "indexing tunnel" (it looks like a square inside a square)? If you look at the wire inside the For loop, it is not a double-line, meaning a 2D array, but a single line, meaning its a row of the 2D array. You don't need to wire anything into the N terminal of the For loop -- it will automatically step through each of the 21 rows of R. Now bring a into the loop -- here you do not want an indexing tunnel (because you want the entire array, all 125 elements, inside the loop), so right-click the "a" tunnel and choose "Disable indexing". Now you have two 125-element 1D arrays you need to multiply, element by element -- this is exactly what the LabVIEW Multiply function does. Wire the output from this multiply through the For loop (notice another Indexing tunnel, this time turning each of the 21 iterations of the For loop into a 21-element array, "mu". And you are done. So what do you need to solve this? One Reshape Array, one For loop, and one Multiply function. Try it out. Bob Schor

LabVIEW

Problem evaluating iterations

Solved!

Absolutely. But this was a beginner struggling to learn LabVIEW, looking at the Forest and seeing only individual leaves, to say nothing of trees. So I took the opportunity to expand on some aspects of 1D and 2D arrays ...

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LabVIEW

Problem evaluating iterations

Re: Problem evaluating iterations