Question

I’m not quite sure if I can ask this question here or on SuperUser,

I want to know how can I plot a CDF chart out of my excel data.
My data is something like this (my real data have 22424 records):

1   2.39E-05
1   2.39E-05
1   2.39E-05
2   4.77E-05
2   4.77E-05
2   4.77E-05
4   9.55E-05
4   9.55E-05
4   9.55E-05
4   9.55E-05
4   9.55E-05
4   9.55E-05
8   0.000190931
8   0.000190931

Answer 1

You can use the NORMDIST function and set the final parameter to true:

As an example, suppose I have 20 data points from 0.1 to 2.0 in increments of 0.1 i.e. 0.1, 0.2, 0.3…2.0.

Now suppose that the mean of that dataset is 1.0 and the standard deviation is 0.2.

To get the CDF plot I can use the following formula for each of my values:

=NORMDIST(x, 1.0, 0.2, TRUE) -- where x is 0.1, 0.2, 0.3...2.0

---

To remove duplicate entries from your data and sum values that are the same you can use the following code.

1. In excel, place you data in sheet1, starting in cell A1
2. Press ALT + F11 to open VBE
3. Now Insert > Module to place a module in the editor
4. Cut and paste code below into module
5. Place cursor anywhere in RemoveDuplicates and Press F5 to run the code

As a result, your unique, summed results will appear in Sheet2 in your workbook.

Sub RemoveDuplicates()
    Dim rng As Range
    Set rng = Range("A1:B" & GetLastRow(Range("A1")))

    rng.AdvancedFilter Action:=xlFilterCopy, CopyToRange:=Worksheets("Sheet2").Range("A1"), Unique:=True

    Dim filteredRng As Range
    Dim cl As Range

    Set filteredRng = Worksheets("Sheet2").Range("A1:A" & GetLastRow(Worksheets("Sheet2").Range("A1")))

    For Each cl In filteredRng
        cl.Offset(0, 1) = Application.WorksheetFunction.SumIf(rng.Columns(1), cl.Value, rng.Columns(2))
    Next cl
End Sub

Function GetLastRow(rng As Range) As Long
    GetLastRow = rng.End(xlDown).Row
End Function