Hi, I have a code that selects the current region from cell A1 and inverts the matrix entered in that region. I want the user to enter the matrix in a userform and not in Excel's cells. What can I do to accomplish this?
Hi, I have a code that selects the current region from cell A1 and inverts the matrix entered in that region. I want the user to enter the matrix in a userform and not in Excel's cells. What can I do to accomplish this?
Here's a simple demo of using a userform to capture data and use it
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Paul
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Thanks, I want to create a similar userform but the matrix size may vary. This is the code and I want the variable "a" (matrix) to be in a textbox or anything similar where the user enters the values , is that possible? Like if what happened in the Current region just happened in the userform.
Dim a As Variant, c#(), x#, y# Dim m&, u#, i&, j&, rv&() Dim q&, w& Set a = Cells(1).CurrentRegion m = a.Rows.Count 'UBound(a, 1) ReDim c(1 To m, 1 To m), rv(1 To m, 1 To 2) For i = 1 To m: c(i, i) = 1: Next i For q = 1 To m u = 10 ^ 15 For i = 1 To m If rv(i, 1) = 0 Then If a(i, q) <> 0 Then If (Log(a(i, q) ^ 2)) ^ 2 < u Then u = (Log(a(i, q) ^ 2)) ^ 2 w = i End If End If End If Next i rv(w, 1) = w: rv(q, 2) = w: x = a(w, q For j = 1 To m a(w, j) = a(w, j) / x c(w, j) = c(w, j) / x Next j For i = 1 To m If rv(i, 1) = 0 Then y = a(i, q) For j = 1 To m a(i, j) = a(i, j) - y * a(w, j) c(i, j) = c(i, j) - y * c(w, j) Next j End If Next i Next q 'BACK SOLUTION For q = m To 2 Step -1 For w = q - 1 To 1 Step -1 x = a(rv(w, 2), q) a(rv(w, 2), q) = a(rv(w, 2), q) - x * a(rv(q, 2), q) For j = 1 To m c(rv(w, 2), j) = c(rv(w, 2), j) - x * c(rv(q, 2), j) Next j Next w Next q For q = 1 To m For j = 1 To m a(q, j) = c(rv(q, 2), j) Next j Next q Cells(m + 2, 1).Resize(m, m) = a
Last edited by Bob Phillips; 10-11-2016 at 02:41 AM. Reason: Tidied-up code