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Histogram From Weighted Data


I'm trying to use the 2007 histogram tool (or frequency) to show me the frequency of data, but my data is in a different form than required for either of these tools. Let me use the following simple case -- to show the frequency of student grades both tools assume I have a list of student's test grades. What if I instead have more than one column, e.g., "grade" and "number students with that grade"??

My application is actually different, but it's still 2 columns, a numeric property and a weighting factor (e.g., fraction of the total).


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I have one source spreadsheet, where are columns NAME, DATE. I read these data by ADO to other spreadsheet, where I can change/delete data and then run macro for update data in source spreadsheet. The problem: In source spreadsheet is column "NAME" and column "DATE", with values e.g. "Joseph"; 1.1.1980. I read this data to other spreadsheet, then I delete in it value 1.1.1980. When I run macro Update, it messages error.

Sub UpdateItem
...
.Fields.Item(1).value = activecell 'activecell value = "Joseph"
If Not isempty(activecell.offset(0,1)) Then
.Fields.Item(2).value = activecell.offset(0,1).value
Else
.Fields.Item(2).value = "" 'I tried Empty and 0 too but when I read data again then, it displays 0.1.1900, nothing works
End If
...
End Sub

It seems that in source spreadsheet has data in column "Date" format Date and when I try to update data in format String ("") in source spreadsheet by Update macro, it messages error. When I used

.Fields.Item(2).Value = Empty
' or
.Fields.Item(2).Value = 0

after rereading data it displays 0.1.1900 What I want to get is that if the cell with date (in other spreadsheet) is empty, the cell in column Date in source spreadsheet after updating will be blank (contains no values).

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Copy All Data From Data Sheet, Sequence Top Down By Spend, Manually Delete All After 50
I have two sheets, a data sheet with all our customers by ref, name and spend; and a presentation sheet.

In the presentation sheet I want to display the ref, name and spend of the Top 50 customers by spend, price high to low.

The workaround:

Copy all data from data sheet, sequence top down by spend, manually delete all after 50.

My only issue is that each month the data sheet will update and I want the Top 50 to auto update, without performing the workaround above.

Is there a way to do this without VBA i.e. pivot tables etc

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VBA To Autofill Formula Over Column Data Calculate And Replace Original Data
Id like to apply a formula, any formula to an entire column if it contains data, and incorporate the original data in the calculation and then replace the original data with the result. I don't want to have to create new columns.

I'm using this to fix up database results; a common problem is dates in dot format e.g. 14.11.2008

All I have so far is an autofill formula that overwrites everything. Can someone help me with the rest? I'm using the SUBSTITUTE function to replace the dots '.' with slashes '/'

Sub Create_formula_result()

Dim Limit As Long
Dim r As range
Set r = range("A1")

r.FormulaR1C1 = _
"=IF(RC[0]"""",(SUBSTITUTE(RC[0],""."",""/"")+0) ,"""")"
Limit = ActiveSheet.UsedRange.Rows.Count
r.AutoFill Destination:=range(r, Cells(Limit, r.Column))

End Sub

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