Random Sampling Without Replacement
Jun 5, 2009
I'm trying to take a random sample without replacement. The sample is also partially representative, e.g. if a certain proportion of the data are Class A and a certain proportion is Class B, that proportion is maintained in the sample. After the proportions are set, the observations within each class are randomized.
Is there anyway to sample a number of rows, where the number of rows is based on the value in another cell, without having to use a lookup function or index match? Sorry if the question is a little unclear; please let me know if you need any clarification.
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Jun 28, 2009
I have a file (see SAMPLE file attached) with over 2000 records. I need to know if there is a way to do a sampling or random selection by ethnicity and gender in order to get a diverse population for only 60 individuals. The selection criteria should be on ethinicity and gender.
Is this possible?
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Aug 14, 2006
Does anyone have VBA code to sample from a multivariate normal distribution? The correlation can be the same for all variables.
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Feb 10, 2013
I have a set of data that represents points in a cycle. I would like a way to take a subsample of the data at discrete percentages (i.e., 0%, 5%, 10%......100%).
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Nov 4, 2011
I need to audit files produced by others based on a numerical sampling. For instance, I may need to audit every 5th file for one person, but every 12th file for person 2.
Does XL (2007) have an easier way to select every "Xth" file than numbering the lines manually?
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Jan 29, 2014
I have 3 calculations I would like to make based on data in the spread sheet and I can't seem to get them to work with data from the two separate columns.
I tried a few of the index match max formulas I found here and could only get them to work with one column of data.
I have the spread sheet attached and the 3 calks I want to do are blank on the bottom.
I am using Excel 2011 for Mac
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Apr 15, 2009
I have a formula to get unique values from a column....Can anyone help me to re write with the funcations in attached file...
Formula...
=IF(ROW()-3>$B$22,"",VLOOKUP(ROW()-3,$B$4:$C$22,2,FALSE))
Macro is not allowed...
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Jun 4, 2009
I am looking for a replacement to the function COUNTIFS that will work with Excel 97-03. I have attached a sample of the document which will hopefully demonstrate what I am trying to achieve. On the sheet labelled 'Data' there is four headings (MerRefs, JCPRefs, Self Refs and Other) for the results beneath these headings I have used the Countifs function. I have attempted to use the SUMIF as an array formula but couldn't get this to work.
Also in the hope of killing two birds with one stone, I created this in Excel 2007 and in the past when I have saved documents as 97-03 documents it used to warn me of any incompatible functions included within the doc and now it doesent. Where can I switch that setting on?
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Feb 20, 2009
I have several walking routes that are labeled A through H. Each walking route has a different distance. .18 miles, 1.45 miles, etc. What i would like to do is be able to enter what routes are walked in a day and have it display the milage in a total cell. Example......
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Mar 15, 2009
In the attached spreadsheet, I want to do a running average of the "To" column (column G) for each company throughout the 8 year period. The only problem is I want to do it with replacement based on column D, meaning if the same brokerage firm comes out with a new announcement, it will replace the value of the old one in the running average calculation.
Here is an illustration of what I mean:
Looking at Company A between row 2 and 12, the value for Consensus in row 2 should be the average of Column G in row 2, row 3 is the average of Column G in row 3...row 11 is the average of Column G in row 2 to row 11, but row 12 will be the average of Column G in row 2 to 12 be excluding column 5's value because both column 5 and 12 are issued by the same brokerage.
I want excel to replace new recommendations by brokerages over the old ones in the running average calculation.
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Oct 30, 2009
What can I use to replace the portion in red because it is volatile?
=IF(A3="N","",RANK(B3,$B$2:INDIRECT("$B$17"),0)+COUNTIF($B$2:B3,B3)-1)
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Mar 1, 2007
We have two characters : One debit shown as Dr
Another Credit shown as Cr
we have an excel sheet containing a problem as under:
row 1 row2
column 1 Sales 345670 Dr
column 2 Receipt 340000 Cr
column 3 TDS 5670 Cr
We have replaced the Suffix so that it looks as under:
Sales 345670
Receipt 340000 Cr
TDS 5670 Cr
Wewant the last two lines to have figures in the negative ie - 340000
- 5670
i.e. cr suffix change to negative figure -340000
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Feb 17, 2008
I have a cell with a url in it, Say in A1 I have the following url:
mrexcel.com/forum/forumdisplay.php?f=10
I want Cell B1 To copy what's in cell A1 but delete everthing after the backslash"/" In B1 want it to show: mrexcel.com
What I have now doesn't work, which is:
SUBSTITUTE(A1,"/*","")
An attempt to use a wildcard (*) to remove everything after the backslash. Doesn't work
What's the correct formula that will allow me to do this automatically?
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May 29, 2008
Assist me in getting the following statement into Excel 2003 format - it is working OK in Excel 2007.
=COUNTIFS('Sheet 1'!$AB:$AB,"True",'Sheet 1'!$F:$F,'Sheet 2'!B13,'Sheet 2'!$J:$J,">="&H2,'Sheet 1'!$J:$J,"
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Dec 11, 2006
I have some code to insert a picture based on the value of a cell. The user would select the name of the item by selecting the cell and then clicking a macro button.
In my code I need to delete the previous picture first. I used the following
Sub get_system_picture()
Dim pic As Shape
Dim picname As String
picname = ActiveCell.Value
On Error Resume Next
'exit sub if selection is not a system number
If IsEmpty(ActiveCell) Then
MsgBox "Please select a system number first!"
Exit Sub
End If
If Not ActiveCell.Column = 2 Then
MsgBox "Please select a system number first!"
Exit Sub
End If
The problem is this also deletes my macro button! Any suggestions?
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May 10, 2012
I compile ratings for racehorses and am currently extracting the data I need using an array formula. Unfortunately there are are many thousands of lines of data and it can take quite some time for the data to pull through.
Here is a sample of the formula's I am currently using. I cannot take credit for the formulas by the way I found them on the web.
IF(ISERROR(INDEX('Database 2012'!$A$1:$B$300,SMALL(IF('Database 2012'!$A$1:$A$300=Ratings!$A3,ROW('Database 2012'!$A$1:$A$300)),1),2)),"",INDEX('Database 2012'!$A$1:$B$300,SMALL(IF('Database 2012'!$A$1:$A$300=Ratings!$A3,ROW('Database 2012'!$A$1:$A$300)),1),2))
Basically I have 2 sheets (Database 2012, Database 2011) with the horse names with ratings next to them for each run, One sheet for this season one for last season.
These are sorted in date order. then I have a ratings sheet that shows the horse name and then to the right it has columns for each of its last 4 ratings.
The formulas I use look for the horse name on the database sheet then put the rating in latest rating in the first column then the 2nd latest in the next column and so on until the last 4 ratings are shown. If there are not 4 ratings to find the is an iserror at the beginning of the formula to populate that cell with a blank so that the errors dont show.
What I want to know is there a way of doing what the formula does using VBA and more importantly would it be quicker than using array formulas which are very slow to recalculate when there are 1000's of lines.
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Jun 17, 2008
My boss has made it clear I can't require our people to use the add-in.
I have searched under WORKDAY as well as under Barry Houdini, since someone said he has come up with plenty of replacements for the Analysis add-in... but I am not finding it.. can someone help?
Using the add-in, this is what I have:
myCell.FormulaR1C1 = "=WORKDAY(RC[1],-RC[2])"
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Jun 26, 2008
I am trying to search a folder that is selected by the user for all .jpg files, and then place all those pictures onto a certain spreadsheet within the excel file. It also formats the pictures. Following is the
Private Sub BatchProcessThumb2x3()
Msg = "Select a file containing the photos you want to insert."
Directory = GetDirectory(Msg)
If Directory = "" Then Exit Sub
If Right(Directory, 1) "" Then Directory = Directory & ""
On Error Resume Next
With Application.FileSearch
.NewSearch
.LookIn = Directory
.Filename = "*.jpg"
.SearchSubFolders = False
.Execute
' Select begining range
Worksheets("Thumbnail (2x3)").Select
Range("B4").Select
' Loop through all files and process them
For i = 1 To .FoundFiles.Count..............
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Aug 9, 2006
I was wondering if is possible to replace SUMPRODUCT with code. Right now I have formulas like these throughout my sheet and I think they are causing it to be slow:
=SUMPRODUCT(--($B$4:$B$1002<=B4),--($M$4:$M$1002="PROD"),--($O$4:$O$1002="O"))
I also have the following code in my worksheet. I don't know if anything here is causing it to take so long to "calculate cells." Also my code just stopped coloring the row ranges and I not sure what cause it to stop working.
Private Sub Worksheet_Change(ByVal Target As Range)
Const WS_RANGE As String = "O:O"
If Not Intersect(Target, Me.Range(WS_RANGE)) Is Nothing Then
With Target
'Begin coloring row ranges based on these requirements
If .Row > 3 Then
If Me.Cells(.Row, "O").Value = "" Or Me.Cells(.Row, "O").Value = "O" Or Me.Cells(.Row, "O").Value = "H" Then
Me.Cells(.Row, "A").Resize(, 26).Interior.ColorIndex = 0
End If.................
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Dec 4, 2013
Okay so I'm trying to us the SUMIFS formula to add values on a different sheet based on criteria on that sheet but I want to use a text string on the sheet with the SUMIFS formula to reference the sheet with the data on it.
My original formula was:
=SUMIFS(INDIRECT("'"&A2&"'!K4:K500"),INDIRECT("'"&$A$2&"'!B4:B500"),"=LEFT(AA1,2)",LEFT(INDIRECT("'"&$A$2&"'!C4:C500"),3),"=MID(AA1,7,3)")
However I kept getting an error and excel said that INDIRECT("'"&A2&"'!K4:K500") was volatile, so I tried to replace it with INDEX and my formula was:
=SUMIFS(INDEX(A2:A2,1)&"'!K4:K500",INDEX(A2:A2,1)&"'!B4:B500",LEFT(AA1,2),LEFT(INDEX(A2:A2,1)&"'!C5:C500",3),MID(AA1,7,3))
However INDEX(A2:A2,1)&"'!K4:K500" returns the value "1251062 EP.EL+CB-A10'!K4:K500" which wont calculate properly because of the quotation marks but excel is auto inserting them.
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Nov 22, 2006
How could I have a macro which translates formulas on file open since Excel doesn't do it itself for functinos from add-ins like YEARFRAC?
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Jun 20, 2007
In the following thread, richphillips wonders about Application.Filesearch
Application.filesearch In Office 2007
Is there a replacement for this? I have several macros that use Application.Filesearch and I would like it to work not only with Excel 2003 but also with Excel 2007. This is the function
Function CreateFileList(FileFilter As String, _
IncludeSubFolder As Boolean) As Variant
' returns the full filename for files matching
' the filter criteria in the current folder
Dim FileList() As String, FileCount As Long
CreateFileList = ""
Erase FileList
If FileFilter = "" Then FileFilter = "*.*" ' all files
Debug.Print CurDir
strFolder = BrowseForFolderShell(, , , 0)
If strFolder = "" Then
MsgBox "You Cancelled"
Exit Function
End If............
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Oct 4, 2007
I have the following code written:
If InStr( Cells(i, 3).Value, "Other") > 0 Then _
Cells(i, 3).Replace What:="Other", Replacement:=Cells(i, 4).Value
This seems to work fine for the most part. However, if the value in Cells(i, 4) is too long, I seem to get a Run-time error '13': Type mismatch. Is there any way to rework this code so it can replace even if the string in Cells(i, 4).Value is too long?
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Aug 11, 2008
Im trying to work out how to write some code to find and replace from a list.
I have key data in column P on sheet 1, and a list on sheet 2 with the same key data in column C.
Basicially, every month the data on sheet 1 changes (there are usually 100 rows of data each month) and what i want to do is, write some code to look down column P on sheet 1 and for every cell, find the corrosponding value on sheet 2 (column C). When it finds the value, copy and paste it onto sheet 3 then delete the row from sheet 2.
I hve written some code that can do the first part (copy and paste) and a second macro to do the deleting....but it is only for 1 value at a time...
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Sep 18, 2009
I am working on a Random Cycle Count Generator that provides random SKU#s based on 3 separate columns of SKU listings. The user clicks a button to generate the SKU#s to cycle count for that day. What I would like to see is a date stamp in the columns next(B,D,F) to the referenced SKU listing(A,C,E) based on which SKU#s are generated. This will let me see the last date that the SKU was generated. I would also like it to automatically save after generating.
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Aug 18, 2007
I have eight teams and i want them to play each other i.e
1 v 2
3 v 4
and so on till all teams have played each other, can i do this randomly
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Aug 1, 2014
Since the range selection is going to be changing at time intervals( automatically), they can not be pre -defined( as above in g2,h2)
Suppose we want to know the sum of all the values against 11(now which is described as =g6 in cell J2),
HOW DO WE SET THE RANGE (E6:H11) ?
( AUTOMATICALLY, SUBJECT TO CHANGING THE SELECTION G2,H2 WHICH WILL THEN BE SOMETHING ELSE(EXAMPLE G2=1 TO H2=5)
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Dec 10, 2006
How do I make a row of 5 random numbers in A2:A6 that are not the same as each other. It's basically for a Bingo card. I have a formula that can calculate the random numbers =INT(RAND()*15)+1 under the B's for example, but I can't seem to figure out how to make it so they are not the same.
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Feb 26, 2009
First time poster, long time viewer for help.
this one should be an easy one for you experts.
i am in charge of making an assignment list in my classroom .
cells A1 all the way to A20 have a single childs name in them.
in the corresponding box ,B1 which is next to the first name and B2 next to name 2 , etc etc. i would like to put 3 random chores they need to do for the week. the first chore being in column B the second chore in C and thirs chore in D . in other words, each child listed in column A , 1-20 will have 3 chores to do over the week .
all 3 chores for each child will be in the same numbered row as their name.
i have a list of all the chores at the bottom of the spreadsheet, theyre from A20 to A40 (20 chores in a row) . i want excel to randomly put A20-A40 in the corresponding boxes next to the kids names.
im tired of having to mix all their chores up for the week next to their names.
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Jun 20, 2009
I'd like a spreadsheet that pulls out a random name.
I'll put in a lookup table, George, Fred, Ralf, Steve, Peter.
Sometimes Fred will come up, sometimes George will.
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