Hello everyone.
Please I really need help.
I have a matrix that I want to square (multiplying it by itself).
and then I'm gonna add the value of each row of this matrix, and then add the value of this column and divide each value by the total.
Look at this picture and you will understand what I mean.
I need a code to repeat this process until the difference in the weight is < 0.01 (probably using loops).

Im using this code to square the matrices:
``````  Dim xArray As Variant, zArray As Variant
Dim Fn As Object
Set Fn = Application.WorksheetFunction
xArray = Range("g11:j14").Value
zArray = Fn.MMult(xArray, xArray)

ActiveCell.Resize(4, 4).Value = zArray
``````
and thanks in advance!
aikimark

What is the "difference in the weights"?
Hamood Hamood

The "difference in the weights" is each value of the weight minus the value of the previous weight.
Like this:
repeat until all the weight differences in two adjacent sets are < .001 or until a single comparison is < .001?

Repeat until the weight differences in two adjacent sets are < 0.001
Which means
A-a < 0.001 and B-b <0.001 and C-c <0.001 and D-d<0.001
You could set up a formula that checks that
``=And((L15-L9)<.001,(L16-L10)<.001,(L17-L11)<.001,(L18-L12)<.001)``

Then, select two adjacent blocks and the checker cell and do a fill down, dragging the selection by the lower right corner until the checker value equals True.

What I need is a loop that keeps squaring the matrix until the difference between the weight of the squared matrix and the weight of the previous matrix is < 0.001. That's what I mean bro.
I already know the code to square the matrix. but I dont know how to create a loop that keeps squaring the matrices.
aikimark

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Im getting this error:

here:
Are you using my workbook?

Im using a command button in a userform
Did you look at my workbook?

The code assumes a certain configuration of cells to start.  If your worksheet does not have that configuration, I would expect the code to fail.

Oh, my bad. It's working perfectly!! thank you so much indeed!!
1 last request, please. I want to record the results of the last weights in a fixed range of cells.
I mean no matter how I change the values of the matrix. after the loop ends, I want the results of the last weights recorded in some fixed range of cells. Let's say cells (O6:O9). can you please help me? and thank you a lot!!! you are truly a life saver!
That is a new feature, so that should be a new question.