The other day, while I was putting my kids to sleep, this idea came to me. How do I check if a cell contains a palindrome, using Excel formulas?
Next morning, I wrestled with excel for about 20 minutes and boom, the formula is ready.
Here is how it works:
If you enter a word or phrase in column B, it would tell you whether it is a palindrome or not.
But what is a palindrome?
A palindrome is a word, phrase, verse, or sentence that reads the same backward or forward. For example: A man, a plan, a canal, Panama!
[definition from palindromelist.net]
So, to check if a cell contains palindrome, we need to reverse the cell contents and see if both original and reverse are the same.
For example if B1 contains MAN, then the reverse would be NAM and hence MAN is not a palindrome.
But how do we write a formula to check if a cell has palindrome?
- Assuming B1 contains the word (or phrase), the first step is to clean it. That means, we need to remove any spaces, commas, exclamation marks & other punctuation symbols. So a phrase like “Cigar? Toss it in a can. It is so tragic.” would become “CigarTossitinacanItissotragic”.
- The next step is to match this cleaned text (lets say this will be C1) with the reverse of it.
- But there is no reverse formula. So we use MID() to extract one letter at a time and match it with the corresponding letter from end. (ie first letter with last letter, second letter with second last letter etc.)
- To do this, we use,
MID(C1,ROW(OFFSET($A$1,,,LEN(C1))),1=MID(C1,LEN(C1)-ROW(OFFSET($A$1,,,LEN(C1)))+1,1) - The left portion of this formula would give individual letters in C1 in left to right order and the right portion would give same in reverse order.
- We wrap this in a lovely SUMPRODUCT formula so that we can check for palindrome-ness of B1 using
=IF( SUMPRODUCT( ( MID(C1,ROW(OFFSET($A$1,,,LEN(C1))),1) = MID(C1,LEN(C1)-ROW(OFFSET($A$1,,,LEN(C1)))+1,1)) + 0 ) = LEN(C1), "It’s a Palindrome", "Nah!")
How does this formula work?
Well, that is your weekend homework. Go figure.
One more homework if you are game
If you feel like playing with words, here is another challenge.
How would you test if a cell contains alliteration?
(Alliteration here is defined as sentence where all words begin with same letter)
Go ahead and post your answers using comments.
Download Palindrome Test Excel Workbook
Click here to download the excel workbook and see the palindrome test formulas yourself.
Learn more about Excel Array Formulas
Array formulas are a special class of Excel formulas that can provide powerful results with little work. We have a huge collection of array formula examples on chandoo.org. Go thru below list and see how deep the rabit hole goes.
SUMPRODUCT Formula and how to use it
Advanced SUMPRODUCT Queries
Use Array Formulas to check if a list is sorted
Calculating sum of digits in a number using formulas
Check if a number is Prime using array formulas
More… Excel Array Formulas – Examples & Demos
PS: Monday is our (Indian) Independence Day. So I will see you again on Tuesday.
PPS: On Tuesday, we will be announcing our Excel Formula Crash Course. Get ready.
14 Responses to “How to Add your Macros to QAT or Excel toolbars?”
We have only just got excel 2007 so this is helping me navigate my way through the differences cheers.
For Macro's i always add a Command Button, rename it something obvious, change the colour of it and finally add the following to its View Code section.
Application.Run "MAcro1"
This way anyone opening the file knows what to do if i ever win the lottery and dont make it in 🙂
Hi,
Good article. But I have this problem.
1) Customized QAT with a macro. Macro name = MacroX
2) Runs OK from original location (e.g. C:\TestLoaction1\TestFile.xls)
3) Copy past file to new location (e.g. C:\TestLoaction2\TestFile.xls)
Menu button now fails:
Cannot run the macro "C:\TestLoaction1\TestFile.xls'!MacroX' The macro may not be available in this workbook...
Of course the code is there, and macros are enabled.
Could get it to work after deleting and recreating macro custom buttons. So have to re-assign macro to QAT button every time I move the file?
If I put a form button on he worksheet and assign the macro to that, it's location independent.
Any ideas?
Thanks
@Ron
What you have said is correct
Macros within a worksheet are stored within the worksheet and hence follow it.
Macros referenced by a button in the QAT or elsewhere are locaed in a file and if that file is moved the linkages don't follow.
The easiest way around this is to store all your macros in a location that doesn't move and is in fact reloaded everytime that Excel starts and that is called the Personal.xlsx/b file.
These are refered to several time at Chandoo.org or have a read of
http://www.rondebruin.nl/personal.htm
or
http://office.microsoft.com/en-us/excel-help/deploy-your-excel-macros-from-a-central-file-HA001087296.aspx
In Excel 2003 and prior versions, a button added to the Toolbar maintained a DYNAMIC link to the file (e.g. Personal.xlsb) holding the assigned macro, such that if the file was relocated for any reason (by using Excel's native Save As command rather than just moving it via Windows Explorer), the link between the button and the file was updated.
I expected the same to occur with Excel 2007+, but alas, Microsoft in their infinite wisdom have removed another feature useful to advanced users (just as they did by removing the ability to design your own buttons)!!
So having just done some reorganisation of my files, I now have to remove and recreate every friggin macro button on my QAT (I have lots) - what a pain in the proverbial!!
Hi Hui,
Thanks for the help, that's really useful.
1) The macros I'm adding are for one specific Excel application, so I really wanted the macros to follow the file
2) I didn't want to have to pass other files around too and have users installing those - either Personal.xlsx/b or as an Add-In.
3) I realise now that the QAT additions will appear for other Excel workbooks in which I don't want the macros available.
So, it looks like I need to keep it local, by using a button on the worksheet. Unless you can suggest any way of adding to menus just for a specific workbook.
Thanks again for your help. Great site, so I'll be signing up for the emails.
Ron
I know I'm a little late jumping on this post, but wondering if anyone knows how to add a UDF to the QAT? I've saved my UDF in my personal workbook, but it does not show up in my list when I choose Macros when customizing my QAT. Suggestions? Thanks!!
@Cheryl: UDFs cannot be accessed like Macros. You can use them from other macros or from worksheet cells as formulas...
@David: If you save your macros file and then install it as an add-in then it will be always available for you.
The instructions work great when you are creating a new file, and it is still open. I find that I can't access macros after I've saved a file as an xlam and closed it. When I reopen the xlam, either by browsing to it, or by having it set to open as an addin using Excel Options, the macros are no longer available in the macros list when I go to edit the QAT. Any way around that?
[...] Add this macro as a button to Quick Access Toolbar [...]
I need to create a button that will run a macro. Once you click the button it needs to open up a browser asking you to select a report/file. Once you select the file, it will run the macro on the selected file and then save it as a new report with a name and the current date. I created the macro to sort/modify the report but I do not know how to do what I mentioned above. I hope this makes sense.
I'm having trouble adding a macro to the QAT. I've done everything up to step 5 but my macro isn't showing up. What am I doing wrong?
[...] Add Macros to Quick Access Toolbar (works in Excel 2003 & above) [...]
Hi,
Thank you for the explanation. Very useful for a recent switcher from office 2003 to office 2010.
My follow-up question is: in Excel (or ppt) 2010, can you customize the macro button that you put in the QAT?
In office 2003, once you chose the custom button for your Macro, you could then edit pixel by pixel the said button.
For instance, I've created 2 Macros in PPT that are converting all my slides to either English or French language, so I'd like one button to show EN and the other FR... that would be more meaningful that any of the possible "custom" office 2010 buttons
I read all the post and one important aspect to the QAT was never mentioned. That is, you have a macro driven worksheet that you want to share with other. You have customized the QAT with two icons to run the macros (VBA programs in reality). However, when the others receive the workbook, the icons are no where to be found. It's my understanding those "customized buttons" have been saved to an outside file, Excel.qat. QUESTION: Could one simply attach that file to your email, along with the worksheet, and tell the recipients to copy that file to correct location on their computer - C:\Users\\AppData\Local\Microsoft\Office|\
Would the customize macro buttons then appear in the worksheet and, more importantly, work? Thanks for your thoughtfulness and thanks for well written instructions Chandoo!
MortW