microsoft excel
Typically, in Excel, one can autofill a column by drag a cell down. However, with a lot of cells to fill up, manually dragging and scrolling the spreadsheet is time consuming.
Is there a much better way to fill up a column with formulas?
Edit: I tried to input the $F$1:$F$20000 at the highlighted place, but the values inside column F is not populated.
It turns out you can do exactly what I wanted:
You can't do this with Evaluate Formula because this isn't the purpose of the function. That's why it is called evaluate, it is for evaluating the formulas. What you want is some kind of unpacking. This is a bit special need so it isn't implemented as a tool in Excel, but there are solutions if you create some Visual Basic functions/macros.
Create a VBA code module (macro) as you can see in this tutorial.
Module in Insert.Function CellFormula(Target As Range) As String
CellFormula = Target.Formula
End Function
Then enter the following to a cell: =CellFormula(A1)
This will tell the formula of the cell. The only problem with this code is that it only works for one level. If you want to unpack the contained cells formulas too, then you need a more complex code with recursion.
It was a long journey but I created a VBA macro for you that implements this function. I don't state that this code will work for every formula, but it will work in most/some of them. Also, I don't state that this code will generate formulas that is equivalent with the originally entered code or will give the same result as the original.
Option Explicit
Function isChar(char As String) As Boolean
Select Case char
Case "A" To "Z"
isChar = True
Case Else
isChar = False
End Select
End Function
Function isNumber(char As String, isZero As Boolean) As Boolean
Select Case char
Case "0"
If isZero = True Then
isNumber = True
Else
isNumber = False
End If
Case "1" To "9"
isNumber = True
Case Else
isNumber = False
End Select
End Function
Function CellFormulaExpand(formula As String) As String
Dim result As String
Dim previousResult As String
Dim cell As Range
Dim stringArray() As String
Dim arraySize As Integer
Dim n As Integer
Dim trimmer As String
Dim c As Integer 'character number
Dim chr As String 'current character
Dim tempcell As String 'suspected cell's temporaly result
Dim state As Integer 'state machine's state:
Dim stringSize As Integer
result = formula
previousResult = result
state = 0
stringSize = 0
For c = 0 To Len(formula) Step 1
chr = Mid(formula, c + 1, 1)
Select Case state
Case 0
If isChar(chr) Then
state = 1
tempcell = tempcell & chr
ElseIf chr = "$" Then
state = 5
tempcell = tempcell & chr
Else
state = 0
tempcell = ""
End If
Case 1
If isNumber(chr, False) Then
state = 4
tempcell = tempcell & chr
ElseIf isChar(chr) Then
state = 2
tempcell = tempcell & chr
ElseIf chr = "$" Then
state = 6
tempcell = tempcell & chr
Else
state = 0
tempcell = ""
End If
Case 2
If isNumber(chr, False) Then
state = 4
tempcell = tempcell + chr
ElseIf isChar(chr) Then
state = 3
tempcell = tempcell + chr
ElseIf chr = "$" Then
state = 6
tempcell = tempcell + chr
Else
state = 0
tempcell = ""
End If
Case 3
If isNumber(chr, False) Then
state = 4
tempcell = tempcell + chr
ElseIf chr = "$" Then
state = 6
tempcell = tempcell + chr
Else
state = 0
tempcell = ""
End If
Case 4
If isNumber(chr, True) Then
state = 4
tempcell = tempcell + chr
Else
state = 0
stringSize = stringSize + 1
ReDim Preserve stringArray(stringSize - 1)
stringArray(stringSize - 1) = tempcell
tempcell = ""
End If
Case 5
If isChar(chr) Then
state = 1
tempcell = tempcell + chr
Else
state = 0
tempcell = ""
End If
Case 6
If isNumber(chr, False) Then
state = 4
tempcell = tempcell + chr
Else
state = 0
tempcell = ""
End If
Case Else
state = 0
tempcell = ""
End Select
Next c
If stringSize = 0 Then
CellFormulaExpand = result
Else
arraySize = UBound(stringArray)
For n = 0 To arraySize Step 1
Set cell = Range(stringArray(n))
If Mid(cell.formula, 1, 1) = "=" Then
trimmer = Mid(cell.formula, 2, Len(cell.formula) - 1)
If trimmer <> "" Then
result = Replace(result, stringArray(n), trimmer)
End If
End If
Next
If previousResult <> result Then
result = CellFormulaExpand(result)
End If
End If
CellFormulaExpand = result
End Function
Function CellFormula(rng As Range) As String
CellFormula = CellFormulaExpand(rng.formula)
End Function
To make it work, just create a macro (as I described it in the beginning of the answer) and copy-paste the code. After this, you can use it with =CellFormula(A1) where A1 can be any kind of 1x1 cell.
I created some examples so you can see it in action. In this case, I demonstrate the use with strings. You can see it works perfectly. The only little bug is that somewhy the algorithm changes the semicolons to commas. After you replace them (as I did in this example), you get the correct output.
Here, you can see how it works with numbers. Now, we face the first problem that the algorithm doesn't care about the mathematical operation sequence, that's why the red number is 6 when it should be 10. If we put the sensitive operations (like addition and subtraction) into parenthesis, then the given formula entered back will give the same output as you can see in the green number in the bottom that says 10.
This algorithm is not perfect. I only tried to implement the most common uses, so it can be improved by adding more features that handle other cases like ranges.
As you can see in this example, I used SUM() with a range as a parameter. Since the algorithm decrypts the cells content from top to down, it starts with the replacement of the SUM() parameters than later with anything else. Therefore, the : stays in its place while around it everything is replaced, so new cells are replaced near to it, who will change the meaning of it. Thus the output will be wrong. So in this case, you can only use this macro to study the original formula.
Best Answer
Instead of clicking and dragging the square in the lower right corner of the cell, you should try instead to double click it. This will autofill it down.
Also, you should get used to using "ctrl" and "shift". When I use excel I go extremely fast because I use lots of keyboard shortcuts. Let me walk you through an example and let you know exactly what I would type. Lets say you have data in Columns A:E with 20000 rows, and want to create a formula for F. Follow these steps:
Once you get used to doing things like this, these 6 keystrokes happen very fast in a fraction of a second.