Using Arrays To Update Table Columns
We are creating a lot of reports everyday and these reports contain a lot of data which is presented in various styles as per the requirements. The data that allows us to create the reports is usually referred as raw data and in most of the cases is stored in hidden sheets.
I am sure you all are aware of a feature called as Excel Tables OR Structured References in Excel. Excel Tables is (in my opinion) the best way to store your raw data and put Formulas in the columns where necessary, this way you eliminate the need of a Cell Based Reference formula (example =SUM(B4:B50) and replace them with =sum(YourTable[YourTableColumnName]).
Another good feature of the Excel Tables is you just need to put the formula in 1 cell and it is replicated for that column by Excel.
Sometimes these formulas take a lot of time to calculate when we have really huge data points. In this scenarios it is better to have hard-coded values instead of the formulas to gain on speed.
In this post we will learn about how we can make use of Array’s to quickly populate the excel columns with the desired results before publishing our reports and other documents.
Here is a demo of what I mean:
Below is the code that allows us to add a new column to our data table and then taking input from the Date Time column provides us with the Week Of column.
Sub UpdateWeek()
Dim myarray As Variant
Dim theRange As Range, startCellRow As Long
Dim tempStr As String
Dim myNewCol As ListColumn
‘If our column already exists then delete it
On Error Resume Next
Worksheets(“Data”).ListObjects(“cs”).ListColumns(“WeekOf”).Delete
‘adding our new column
Set myNewCol = Worksheets(“Data”).ListObjects(“cs”).ListColumns.Add
myNewCol.Name = “WeekOf”
‘Selecting the first cell of the column that contains our dates
Worksheets(“Data”).ListObjects(“cs”).ListColumns(“Date Time”).Range.Cells(2).Select
‘building a temporary Range address, this will be used to upload the entire range into the array
tempStr = ActiveCell.Address
startCellRow = ActiveCell.Row
tempStr = tempStr & “:$” & Mid(Sheets(“Data”).ListObjects(“cs”).ListColumns(“Date Time”).Range.Cells(2).Address, 2, 1) & “$”
tempStr = tempStr & LastRowInOneColumn(Mid(Sheets(“Data”).ListObjects(“cs”).ListColumns(“Date Time”).Range.Cells(2).Address, 2, 1))
‘loading the range into the array
myarray = Range(tempStr).Value
‘Looping through the array and converting each element to the relevant Week format
For i = LBound(myarray) To UBound(myarray)
myarray(i, 1) = Format(myarray(i, 1) – Weekday(myarray(i, 1), vbMonday) + 1, “ddd dd-mmm”)
Next
‘Setting the range address for our output column
Set theRange = Range(Cells(startCellRow, Worksheets(“Data”).ListObjects(“cs”).ListColumns(“WeekOf”).Range.Column), Cells(UBound(myarray) + (startCellRow – 1), Worksheets(“Data”).ListObjects(“cs”).ListColumns(“WeekOf”).Range.Column))
‘storing the values from our array to the WeekOf Column
theRange.Value = myarray
End Sub
Let’s Understand the code
We first delete the column if it is already existing to make sure we always get the new values as output. This is done by the below line of code.
Worksheets("Data").ListObjects("cs").ListColumns("WeekOf").Delete
Once we have deleted the column, we add it again as a blank column and change the name to “Week Of”.
Set myNewCol = Worksheets("Data").ListObjects("cs").ListColumns.Add
myNewCol.Name = "WeekOf"
After this we need to select the first cell of the column that contains the Date Time.
Worksheets("Data").ListObjects("cs").ListColumns("Date Time").Range.Cells(2).Select
Once we have selected the first cell of you Date Time column we then make use of the LastRowInOneColumn function to get the last row and create a range address. We use this range address to assign all the values contained in the Date Time column to an array.
tempStr = ActiveCell.Address
startCellRow = ActiveCell.Row
tempStr = tempStr & ":$" & Mid(Sheets("Data").ListObjects("cs").ListColumns("Date Time").Range.Cells(2).Address, 2, 1) & "$"
tempStr = tempStr & LastRowInOneColumn(Mid(Sheets(“Data”).ListObjects(“cs”).ListColumns(“Date Time”).Range.Cells(2).Address, 2, 1))
‘loading the range into the array
myarray = Range(tempStr).Value
Once we have loaded all the Date Time values into an array, we do a simple For loop to change the value in the array to the relevant Week Of
For i = LBound(myarray) To UBound(myarray)
myarray(i, 1) = Format(myarray(i, 1) - Weekday(myarray(i, 1), vbMonday) + 1, "ddd dd-mmm")
Next
We perform this operation on the same element and store the modified value in itself.
Once we have all these done, we need to define the Output range, that is where we need to the Week Of values to be stored. This is done by using the Range and Cell functions.
Set theRange = Range(Cells(startCellRow, Worksheets("Data").ListObjects("cs").ListColumns("WeekOf").Range.Column), Cells(UBound(myarray) + (startCellRow - 1), Worksheets("Data").ListObjects("cs").ListColumns("WeekOf").Range.Column))
'storing the values from our array to the WeekOf Column
theRange.Value = myarray
And lastly we assign all the values stored in the array to the new range address we have create above.
Download Demo File
Click here to download the demo file & use it to understand this technique.
What about you? Do you use them often? Please share your experiences, techniques & ideas using comments.
If you are new to VBA, Excel macros, go thru these links to learn more.
Join our VBA Classes
If you want to learn how to develop applications like these and more, please consider joining our VBA Classes. It is a step-by-step program designed to teach you all concepts of VBA so that you can automate & simplify your work.
Click here to learn more about VBA Classes & join us.
About Vijay
Vijay (many of you know him from VBA Classes), joined chandoo.org full-time this February. He will be writing more often on using VBA, data analysis on our blog. Also, Vijay will be helping us with consulting & training programs. You can email Vijay at sharma.vijay1 @ gmail.com. If you like this post, say thanks to Vijay.
28 Responses to “2010 Calendar – Excel Template [Downloads]”
[...] Download and print the calendars today. You can add notes to individual dates or complete … [...] Uni Ego / Free 2010 Calendar – Download and Print Year 2010 Calendar today [...]
Any chance on a 2016 calendar?
Afternoon,
I have one similar calander that I added conditional formatting to so that I could highlight any planned factory holidays. I think i "borrowed" the formula from another calander so I won't post it here.
I also added week numbers to it using the formula =WEEKNUM(MAX(C6:I6)) Where C6:I6 is the range of dates in that give week. It works fine on most of the months but return strange values on other months (Week 6 in October?) I can't see any logic behind why it does this.
Any suggestions for an alternative formula to give the week numbers?
Regards,
William
Hi Chandoo,
I've added a new feature on your spreadsheet.
This control can be useful for all the sheets where you need to check dates.
Cheers
http://cid-69a78592a23a8438.skydrive.live.com/self.aspx/.Public/2010-calendar%5E_Miguel.xls
Hi Chandoo,
Nice calendar.
Till now whichever calendar I saw in Excel, it contained only the outline sheet.
Good to see monthly views and the mini view too.
Liked the mini view much. 🙂
-Nimesh
@William: This weeknum may be because the input dates to max are not properly formatting as excel dates.
Good tip on the conditional formatting and holidays btw...
@Migueal: Now that is super awesome. This is the reason why I love to blog. Readers will always one up me with such cool alternatives. Thank you for sharing this with us.
@Nimesh: You are welcome 🙂
is it possible to get the Notes section on the outline page to display the notes added to the month page for a specific date?
So if you add thing for January 2nd, and then select January 2nd those notes appear on the outline page
@Shish... You can do that using some formula magic. I would not recommend pushing excel to that as outlook / google calendar / icalc etc. do exactly that much more elegantly.
[...] Perpetual Excel Calendar – Free Downloadable Template [...]
Happy christmas to all of you!
This is really awesome. The nicest calender I've seen for Excel. I also like Miguels version of the sheet.
Just one "feature" is missing to me. As I live in Germany - where weeks start on Monday - I'd like to change this. Could someone please give me a hint how to do this?
Thanks in advance
Jörg
Hi Chandoo, I’ve added some new features on your spreadsheet with your permission.
Check it here:
http://cid-6b219f16da7128e3.skydrive.live.com/self.aspx/.Public/Calendar%5E_Pedro.xlsm
Miguel, this calendar is translated to Spanish language.
Jörg, this new approach allows us to start weeks on Monday.
Also it's possible to start weeks on Sunday if you enable Excel macros and push the arrows.
Best Regards,
Pedro.
@Pedro.. superb stuff.. thanks for sharing the file with all of us.
Hi Chandoo, for dates before March 1, 1900 our calendars are wrong.
In Microsoft Excel, DATE, EOMONTH, WEEKDAY functions return an incorrect result between Monday, January 1, 1900 and Wednesday, February 28, 1900.
See this page: http://support.microsoft.com/kb/214326/en-us/
Microsoft Excel incorrectly assumes that the year 1900 is a leap year in all Excel versions.
That's the reason why our calendar versions only work from March, 1, 1900 until December, 31, 9999.
Your comments are welcome.
Pedro.
@Pedro.. Thanks for pointing that out. wow... This reminds me of the Joel Spolsky's first BillG review - http://www.joelonsoftware.com/items/2006/06/16.html (read it, I am sure you would love it.) when Bill out of blue asks about date time implementations for VBA (which Joel is the program manager for...)
Thanks for sharing the URL too... Here is a specially made, chocolate sprinkled, extra fluffy donut for you 🙂
Hi Chandoo, thanks a lot for the donut but I prefer it without chocolate!
Always it's good to know a little history of Excel.
The Joel Spolsky’s last BillG Excel review was about the "Hall of Tortured Souls"
(See this Excel 95 Easter Egg here: http://www.eeggs.com/items/719.html)
Do not miss the humor!
@Chandoo.. I just return with a new calendar version.
http://cid-6b219f16da7128e3.skydrive.live.com/self.aspx/.Public/calendar-pedrowave.xltx
It helped me to practice conditional formatting, formulas to show check boxes, data validation drop down list, find out Thanksgiving Day's date for any year, how to find dates of public holidays using Excel, all reading your wonderful posts!
Perpetual Calendar Spanish version starting weeks on Monday:
http://cid-6b219f16da7128e3.skydrive.live.com/self.aspx/.Public/calendario-pedrowave.xltx
Main characteristics:
- Not macros.
- Select a year from 1900 to 9999 with a dropdown listbox.
- All date fields with the real date format.
- Easy language change of day of the week and month names because are also dates.
- Hide Saturdays and/or Sundays.
- Week starting on Sunday or Monday.
- Week and month numbers.
- Hyperlink between sheets.
- Consistent colors to Holidays, Diary and Events dates.
- Easy change of Holidays by country.
- Include 80 World Days and you can add more.
- A diary with my birthday and 50 more programable appointments.
- Check box to hide individual dates or all.
- Holidays, diary and events text are showed on each month's sheet.
- Ranges defined with Name Manager variables.
I'll appreciate if you make me some suggestions to improve this calendar.
Pedro.
Please, I need help!
I like all calendar from Pedro, thank you for them. Let me show my problem:
I have 2 excel cells (for example AE12 and AE13) which mean the starting and the ending date of my duty. I need a macro to insert sheets with label YEAR. MONTH (for example 2010. August or similar) with the proper datas between the two dates. Is it possible?
Thank you for reading me and sorry about my terribel english! 🙂
Hello Pedro,
Thanks so much for the modified calendar template. I love the extra functionality you added. Is there any way you could upload an unlocked version? I wanted to change some of the comments and data validation so I could use it for one of my applications.
As for feedback on potential improvements, with all the additions you made the file runs pretty slow. I'm sure this has to do with all the interconnectivity between the various tabs, but if there is a way to use less memory via more efficient formulas or something else I think this would make it easier to use. I have a brand new computer and with it running alone the response was pretty slow. One of the changes I'm making is changing the order of the months to match my company's fiscal year, so maybe something to automate a change like that could be useful.
Cheers,
Peter
Peter, my calendars are unlocked but you need Excel 2007 and 2010 versions to open them.
Now I return with a new Programmable Task Calendar:
http://cid-6b219f16da7128e3.office.live.com/view.aspx/.Public/Calendario%20de%20Tareas.xlsx
Wath an introductory video here:
http://pedrowave.blogspot.com/2010/10/programmable-task-calendar.html
This new calendar allows to select the start month to match the school and fiscal year.
This is great stuff Chandoo and company
Wanted to know if someone had built something similar
I need to store one Excel Sheet on this calendar that has all the holidays
US Holidays appear in RED
UK Holidays appear in Blue
Meetings appear in Green
Submissions appear in Orange
Is there a way I can store the list in a separate worksheet and all the calendars get updated with this?
Thanks
[...] Calendars: Year 2010 Excel Calendar | Year 2009 Excel [...]
please tell me "how to convert Rs.10000/- in to words through excel formula
[...] is all! http://chandoo.org/wp/2009/12/11/2010-calendar-excel-template-downloads/ See more Templates at http://www.vertex42.com/ Share this:Like this:LikeBe the first to like this [...]
Greetings,
Thanks for this wonderful excel vacation tracker. I notice that the tracker only has three months November, December and January 2015, however, I would like to add the other ten months for 2014. Can you please instruct me on how I can add the other months?
Thanking you in advance.
Hi Chandoo,
Calendar: can this be printed as single sheet 8.5x11 inch per month
kanu
@Kanu
Yes,
You can resize it to fit
WOW! I just searching some of like this, that help me.
Thank you for sharing.