Aug 30 2021 11:38 AM
Aug 30 2021 02:37 PM
Aug 30 2021 04:03 PM - edited Aug 30 2021 04:04 PM
Thank you so much for your help. In the attached sheet that I sent you earlier, I created a tab "Bootstrap (2)". The original samples are in rows numbered(1-3), but each sample row is a separate or independent row. So, I numbered them into rows number 1-3 (red, green, blue). But in reality I have 6000 independent rows in my lab test data Excel sheet. How do you make VBA code so it does the resampling for each row independently for the three rows? I can fix the VBA code once i see how you do it?
Aug 31 2021 07:10 AM - edited Aug 31 2021 07:18 AM
I attached two documents. Let me try again. In my lab tests, i have 30 gas releases in the wind tunnel. For each gas release the the measurement of concentration vs time goes up Excel row 6025. i'd like to generate 500 resamples for each row. Each row represents one time, but we did 30 releases( experiments). Please let me know if you have any questions.
Aug 31 2021 09:41 AM - edited Aug 31 2021 09:41 AM
I am attaching the actual Excel Sheet that shows 30 gas releases data. Each release is an experiment on its own. The gas concentrations in the air is a measured with a device and it reads it at different relative times which is shown in A26-A6025. At each relative time you will see the measurements for each relative time. In this experiment 30 samples per relative time is not enough. i need to generate resamples for each row(relative time) for up to 500. I am not sure if you can have the VBA code ask the question how many resamples i need so i can type the number<=500. if i decide to change the numbers of resamples, have it delete the existing and regenerate new resamples based on the new resampling number. this is sheet has the data from lab experiment.
it starts from A26:AF26 and up to row 6025.
Thanks a lot!
Aug 31 2021 01:02 PMSolution
Sub Resample() Dim NumSamples As Long Dim LastRow As Long NumSamples = Val(InputBox("How many samples do you need (31 - 500)?")) If NumSamples < 31 Or NumSamples > 500 Then MsgBox "Invalid input. Must be between 31 and 500!", vbExclamation Exit Sub End If Application.ScreenUpdating = False LastRow = Range("A" & Rows.Count).End(xlUp).Row Range("AG26:SH" & LastRow).ClearContents With Range(Cells(26, 33), Cells(LastRow, NumSamples + 2)) .FormulaR1C1 = "=INDEX(RC3:RC32,RANDBETWEEN(1,30))" .Value = .Value End With Application.ScreenUpdating = True End Sub