I heard there is an efficient way of writing large amounts of data at once to a worksheet. My program is writing alot of data (e.g. 600+ items in each row) and takes over an hour to run because it writes to each cell one-at-a-time. I seached this forum and couldn't find the answer. Here is an excerpt from an old 1998 article by Dermot Balson and William Mercer that used code to write to cells in large chunks but it doesn't work for me - I get a method failed message.
'to read in
Dim A As Variant 'MUST be variant, no brackets
A = Range("SomeRange").Resize(10,20) 'reads 10x20 array starting at range SomeRange
'(NB I've used Resize above but you can specify a range of cells any way you want)
'to write back to sheet
Range("SomeRange").Resize(10,20) = A
'A can be any data type but MUST be two dimensional even if you are only writing one
'column or row - first dimension is used for rows, and the second for columns
'this can be slow - see third question below for workaround..
Here is the link to the article: http://www.avdf.com/apr98/art_ot003.html. A more detailed explanation how this trick works
A macro in workbook 1 creates a report by reading & manipulating data from two workbooks(WB 1 and WB 2).
A new blank report sheet is copied from WB1 to WB2. The data (some text, some numeric) is collected in a 20 element, single dimension array & written to the new sheet in 20 columns using a for/next loop. This is repeated for many rows(can be more than 1000).
The array is "erased" before each row. Screenupdating is turned off, calculation is turned off. The report takes longer & longer each time it is run - Why? With the one-and-only "Write" line "remmed out" the report takes just 2 secs however many times it is re-run - including the copying of the blank master report page. If the first report takes, say, 1 min the second time takes 2 mins & the 3rd - 3 mins etc. Reset is only achieved by exiting excel. The code in question is:- For col = 1 to 20 : cells(ro,col) = d(col) : Next col. (ro = the current row number which is incremented for each pass, d() is the data array)
I'm trying to create a "master file" that can be used later (a tool other uses can pull up) on with datasets of varying size. I'd like to "data dump" a table of individuals with subsequent columns of various characteristics, then automatically compute various things. So then a user can dump their data into my file and "get the answer" immediately. I've seen some stuff on running one calculation on a dynamic number of cells, but let me illustrate why this is different. I want to perform a dynamic number of calculations, see below:
Each row (record) is a person, with some characteristics (numerical). Ultimately I have a few columns on the end with some computations (Excel formulas) I'd like to do. I'd like to do this for each person (that is, each row) in that data that I dump in. But the thing is, ahead of time we don't know how many people will be dumped in, and that changes (because I'd like this to be a tool...). So how do I tell Excel to compute things if there is a person in that row, but do nothing and leave cells blank if there isn't a person? Ideally I don't have millions of ifs testing for blank cells either. I'd like to do this with Excel functions only and not VBA, if at all possible.
I currently have a workbook with 6 sheets, the main worksheet has roughly 10000 rows rows (with is the one Im having trouble with) up until a few days ago scrolling wasnt to bad but just recently it is really struggling to scroll (no changes to workbook)
I have a quad core Q6600 4GB ram plenty of HDD space the excel doc size is 2.8MB
is there anything I can do to improve scrolling on large spreadsheets?
What i'm trying to do is to check a large number of cells, if "0" is written down in that cell it stays as it is and if the number is different from "0" i want to put a "1" instead.
Process is that I read in lines from a text file and then based on a filter I then write some those values to a sheet. One of the values I transfer is always 5 characters with a trailing space. The first four may be all numbers (e.g. "0013 ") or a mix (e.g. "013G "). When I write these to the spreadsheet the ones without letters always end up as a number (e.g. "0013 " become 13). How do I force the cell to show all values as text in the cell just like I read it in. In fact, I'd prefer stripping out the trailing space but it's not critical. That I can do (TRIM).
How to write a sub that read all cells in the matrix ( a block of cells let's say: A5:F15).in two dimensionals. This is what I've done so far, but i got nothing:
Sub myarray() Dim myarray() As Variant myarray = Range("A5:f15").Value End Sub
Just wanted to know if I could have a range or ranges which are split. The current range i have is N5:AV6. I need to miss out every 6th cell so am looking to do a number of ranges like this - N5:R6, T5:X6, Z5:AD6 etc etc. If this can be done could you show me how I would need to lay it out?
i'm trying to get my code to work. Basically my code opens up workbook and extract the relavant data into the main workbook. Previously Its just a single For loop and it works perfectly after changing to double for loop its stuck.
Sub RunCodeOnAllXLSFiles() Dim lCount As Long Dim wbResults As Workbook Dim wbCodeBook As Workbook Dim rCell As Range Dim lCount2 As Long Worksheets("Data").Select Range("a2:ac65536").Clear Application. ScreenUpdating = False Application.DisplayAlerts = False Application.EnableEvents = False On Error Resume Next Set wbCodeBook = ThisWorkbook..................
If I have the numbers 1-50 repeating in columns, 1-50, 1-50 etc is there a way to determine that number "1" falls 1st, 51st etc in the sequence without doing a manual count? Or that the number 2 falls 2nd, 52nd etc?
I'm working on a spread sheet to identify the to ten numbers from a list. I can find thes numbers and use ( =MAX('MHF2'!B:B) )for the function to do so. I'd like to dispaly the data in the cell directly to the left of this number... How do I do this?
I have an issue where I need to apply certain formats to a number of text strings which are domain names. This is purely for reporting purposes. I don't need to actually visit the url. This video demonstrates a bit more. [URL]
I am trying to sort in rows, a large number of rows. I can do text to columns, delimit by colon, and sort individual rows. But I have spreadsheets that are 100s of rows long. Is there anyway to automate?
I have problems in PASTING my 19 digit number from the source report into excel.
E.g, the original value is 8321515222222123122 but it always transfer to 8321515222222120000
I have tried the simple cell format setting, that is after pasting, I set the cells to text, but it doesn't help and also try the custom fomat "###################", but it is still the same result with the last 4 digit lost.
What I want the format to be is not in scientfic and have to be full display.
i have a spreadsheet with a certain data (rate of return) associated to a specific day of a year. (ex. 8-dec.-08 0.99865), and i have to calculate the rate of return (r) for every month, which is done by applying a formula (GEOMEAN) to all the rate of returns for the days of a month (ex. GEOMEAN(r[01 dec.]:r[31 dec.])).
i don't have any problems with that part. the hard part is that i have every single trading day from jan 00 to dec 08 (2000+ days), and i do not want to manually select the ranges. also, the dates do not include weekends (trading days per year = 252) which means that i cant (a) automatically determine a range or (b) automatically associate a number of days to a month (ex. oct 08 doesn't have the same amount of days as oct 07, because of the way week-ends and holidays are arranged..)
I have data in F6:AG6 raw filled with numbers as well as dates, i am looking for formula which can calculate a larger value of number format (excluding date format).
The following macro deletes blank rows in my project (I have a source sheet that I "transfer" information to various "law practice worksheets", and it works fine. However, once I get past a certain number of rows (my project will include 65,000 rows), the macro does not delete the blank rows any more from the "law practice worksheets" (I previously sent this spreadsheet to the Forum with another question that was not answered yet). Here is the macro for deleting rows:
On Error Resume Next Sheets("InternatlLaw").Select Range("A2:D65000).Select Application.DeleteBlankRows = True Selection.EntireRow.SpecialCells(xlBlanks).EntireRow.Delete ActiveSheet.Range("A2:D65000").Select On Error GoTo 0.............
Each sheet contains 30,000 rows of data in column A, C, E, G and I. I want to find each cell of column A, C, E, G and I to another sheets column A, C, E, G and I respectively. If match found then it should return "True" in column B, D, F, H and J.
I have tried VLookup, but it takes too much of time for calculation (1,50,000 vlookup Formulas needs to calculate in each sheet with If condition) some time calculation gives wrong results.
As well as I want to do filtering on this all the data... so that time calculation gives the problems (I have used application.Calculation=xlCalculationManual)
So now I am using Range.Find method, but that loop excecutes for 30,000 times and each ittration contains 5 Find methods.
I have a very large database where I want to filter out numbers that do not have certain two digits as their last two. For example, the column based on which I want to filter out data contains numbers like 197301310153. I want to filter out anything that does not end in 53....
