Ok, you have learned how to write vlookup formulas. You have also seen some pretty interesting examples of it (1, 2).
But how do you write better VLOOKUP formulas?
Here is a list of 6 tips that work wonders with VLOOKUP writing.
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Use named ranges
No one likes a VLOOKUP with lots of dollars and cell references. They are unreadable and difficult to debug. So, a better option is to use named ranges in lookup formulas. For eg: =VLOOKUP(valSalesPerson,tblData,3,FALSE) is much more easier to read and understand than =VLOOKUP(G5,$B$5:$G$17,3,FALSE)
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Make table / list references Absolute
When you need to write lookup formulas in a range of cells, the usual practice is to write first formula and then drag-fill. If you followed above advice and used named ranges, you should be ok with this approach. But if you do use cell references, make sure the table references are absolute, like this: $B$5:$G$17 instead of B5:G17. Here is a nice tutorial explaining the concept of cell references.
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Use Tables or Lists [Excel 2003 or above only]
Using named ranges or absolute references is good technique. But they suffer from one nagging limitation. If your source data (where you are looking up) grows or shrinks, you need to adjust the references. A better option? Use tables (or lists in 2003). Learn more about Excel Tables & how to use them.
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Check for Errors
VLOOKUP is a powerful formula, alright. But ask it to look up a value that is not the data and it acts up. So you need to handle this. The easiest method is to use IFERROR() formula. Like this: =IFERROR(VLOOKUP(…),”Oops, nothing found!”).
But, IFERROR is a new formula in Excel 2007, so if you are using 2003 or before versions you need to use ISERROR (), like this: =IF(ISERROR(VLOOKUP(…)),”Oops, nothing found!”,VLOOKUP(…))
But, there is another problem. The ISERROR() is not only lengthy, it is also ugly and inefficient as it calculates VLOOKUP twice. So a better approach is to use COUNTIF(), like this: =IF(COUNTIF(column, value you want to lookup)>0,VLOOKUP(…),”Oops, nothing found!”) [more: how to handle formula errors]
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Use 1 and 0 for last argument
While I do not recommend this, I have seen many do this in practice. You can use 1 and 0 for last argument in VLOOKUP to make the formula shorter. The formula =VLOOKUP(value, range, column #, FALSE) is same as =VLOOKUP(value, range, column #, 0). Similarly you can use 1 for TRUE.
What more, you can even omit the last argument if it is 0, like this: =VLOOKUP(value, range, column #, ) Remember, you must place a comma (,) after the column number if you are planning to use this.
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Use VLOOKUP only when you need it
Do you know that formulas like SUMIF() or SUMPRODUCT() can effectively replace VLOOKUP() formulas? For eg. the formula =SUMIF(lookup-range, lookup value, return column range) gives same value as =VLOOKUP(lookup value, total range, 2, false) ? [assuming there is only one match, return column range has numbers]
Similarly, if you just want to find whether a value is in a list or not, use COUNTIF() formula.
That is right. Not only formulas like SUMIF are better, they require no separate error handling. If the value cannot be found, they just return 0.
[Learn more about SUMIF & COUNTIF formulas]
Your suggestions for writing better VLOOKUP
What tips / ideas you follow for writing better lookup formulas? Please share using comment.s
Special Thanks to,
Vipul, Ayush Jain, Spotpuff, Glen Feechan, Dominik Petri, Lukas for their valuable tips & ideas. Click on their names to learn more on using VLOOKUP.
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.