Christmas and New year have always been a magical time for us. Even though we end up being in 2 different countries for most of the Christmases, we always cherish the time. It has a special romantic significance too, I proposed to Jo shortly after new year in 2001 (and did it almost everyday until Jan 25th when she finally couldn’t take it any more 😛 ). We wish you a very pleasant Christmas and New Year 2010.
Holiday Posting Schedule on PHD:
Nowadays it is common for any shop to tell their customers what the holiday opening hours are. So in that spirit, I want to let you what we will be posting on PHD between now and Jan 4th 2009.
- 24 DEC 2009 – Post on using DATE formulas to find out popular holidays
- 25 DEC 2009 – No posts (its Christmas day, I am still asleep)
- 26 DEC 2009 – No posts (its weekend, I am out drinking)
- 27 DEC 2009 – No posts
- 28 DEC 2009 – An upgrade to the Indian Mutual Fund Tracker Excel Workbook
- 29 DEC 2009 – My Review of PowerPivot Feature in Excel 2010
- 30 DEC 2009 – Best Posts on PHD in 2009
- 31 DEC 2009 – No posts
- 01 JAN 2010 – No posts (I am calling my friends and wishing them a good year ahead)
- 02 JAN 2010 – No posts (its weekend, I am out running)
- 03 JAN 2010 – No posts
- 04 JAN 2010 – Announcement of Visualization Challenge #2 Entries and Poll
Forums:
I will not be participating much on the forums. I hope that is the same with our active members like Hui (thanks Hui, btw). But I will be checking them once or twice everyday, so go ahead and ask a question if you are stuck. I will try to help you between a Christmas lunch and nap.
Online Store:
The store is open, all thru. Please make any purchases you wish to before Christmas to avail our Thanksgiving sale offers. If you have any problems please get in touch with me on my gmail (chandoo.d @ gmail.com) or phone (+45 5038 4743).
Email:
Please expect some delays if you email me. I will be snoring more than 8 hours a day during the next 2 weeks.
There you go. Now you know what you will miss if you are away. Don’t worry if you are on a big vacation. Just sign up for our RSS Feed or Email Newsletter and the content will be waiting for you when you get back.
Once again, we wish you all a very happy Christmas and New year. 🙂
12 Responses to “29 Excel Formula Tips for all Occasions [and proof that PHD readers truly rock]”
Some great contributions here.
Gotta love the Friday 13th formula 😀
Great tips from you all! Thanks a lot for sharing! bsamson, particularly you helped me on a terribly annoying task. 🙂
(BTW, Chandoo, it's not exactly "Find if a range is normally distributed" what my suggestion does. It checks if two proportions are statistically different. I probably gave you a bad explanation on twitter, but it'd be probably better if you fix it here... 🙂 )
Great compilation Chandoo
For the "Clean your text before you lookup"
=VLOOKUP(CLEAN(TRIM(E20)),F5:G18,2,0)
I would like to share a method to convert a number-stored-as-text before you lookup:
=VLOOKUP(E20+0,F5:G18,2,0)
@Peder, yeah, I loved that formula
@Aires: Sorry, I misunderstood your formula. Corrected the heading now.
@John.. that is a cool tip.
Hey Chandoo,
That p-value formula is really great for a statistics person like me.
What a p-value essentially is, is the probability that the results obtained from a statistical test aren't valid. So for example, if my p value is .05, there's a 5% probability that my results are wrong.
You can play with this if you install the Data Analysis Toolpak (which will perform some statistical tests for you AND provide the P Value.)
Let's say for example I've got two weeks of data (separated into columns) with the number of hours worked per day. I want to find out if the total number of hours I worked in week two were really all the different than week one.
Week1 Week2
10 11
12 9
9 10
7 8
5 8
Go to Data > Data Analysis > T-Test Assuming Unequal Variances > OK
In the Variable 1 Box, select the range of data for week 1.
In the Variable 2 Box, select the range of data for week 2.
Check "Labels"
In the Alpha box, select a value (in percentage terms) for how tolerant you are of error.
.05 is the general standard; that is to say I am willing to accept a 95% level of confidence that my result is accuarate.
Select a range output.
Excel calculates a number of results: Average (mean) for each week's data, etc.
You'll notice however that there are two P Values; one-tail and two-tail. (one tail tests are for > or .05), the number of hours I worked in week two is statistically equivalent to the number of hours I worked in week one.
So here’s a way you might want to use this. You put up a new entry on your blog. You think it’s the best entry ever! So you pull your webstats for this week and compare it to last week. You gather data for each week on the length of time a visitor spends on your website. The question you’re trying to prove statistically is whether there’s an average increase in the amount of time spent on your website this week as compared to last week (as a result of your fancy new blog post). You can run the same statistical test I illustrated above to find out. Incidentally, it matters very little to the stat test whether the quantity of visitors differs or not.
Anyhow, the Data Analysis toolpack doesn't perform a lot of stat tests that folks like me would like to have access to. In those cases I have to either use different software, or write some very complicated mathematical formulas. Having this p-value formula makes my life a LOT easier!
Thanks!
Eric~
Fantastic stuf..One line explanation is cool.
Thanks to all the contributors
OS
Take FirstName, MI, LastName in access (you can fix it to work in excel) capitalize first letter of each and lowercase the rest and add ". " if MI exists then same for last name:
Full Name: Format(Left([FirstName],1),">") & Format(Right([FirstName]),Len([FirstName])-1),"") & ". ","") & Format(Left([LastName],1),">") & Format(Right([LastName],Len([LastName])-1),"<")
I teach excel, access, etc etc for a living and i have my access students build this formula one step at a time from the inside out to show how formulas can be made even if it looks complicated. Yes I know I could just do IsNull([MI]) and reverse the order in the Iif() function but the point here is to nest as many functions as possible one by one (also I illustrate how it will fail without the Not() as it is)
Extract the month from a date
The easiest formula for this is =MONTH(a1)
It will return a 1 for January, 2 for February etc.
if in a column we write the value of total person for eg. 10 if we spent 1.33 paise each person then how we get total amount in next column and the result will in round form plzzzzz solve my problem sir................... thank u
@Anjali
If the value 10 is in B2 and 1.33 paise is in C2 the formula in D2 could be =B2*C2
If the values are a column of values you can copy the formula down by copy/paste or drag the small black handle at the bottom right corner of cell D2
kindly share with me new forumulas.
How to convert a figure like 870.70 into 870 but 871.70 into 880 using excel formula ? Please help.