All articles with 'array formulas' Tag

As part of our Speedy Spreadsheet Week, I have asked you to share your favorite tips & techniques for speeding up Excel. And what-a-mind-blowing response you gave. 75 of you responded with lots of valuable tips & ideas to speed-up Excel formulas, VBA & Everything else.

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Many thanks to everyone who shared their tips & ideas with us. If you like the tips, please say thanks to the contributor.

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We love to compare. The instinct to compare leaves no one. Even my two year old twins compare their toys with each other (and fight).

It would make Excel hugely popular if Microsoft builds a handy data comparison tool right in to it. Alas, they have customizable ribbon, 3d effects & equation editor…

Since comparison is one of the main uses of Excel, we have written extensively about it here.

But there is always one more interesting comparison problem. Today, I want to share one such problem, based on a comment left by N-Man.

Today in Formula Forensics we look at how to Calculate the Maximum value from a list subject to other fields meeting certain criteria:

A common Forum Post question and one that Chandoo has written about a few times is, Does my data overlap with another range?

This week Formula Forensics examines Pradhishnair’s Overlapping Chaninage Problem where he wants to know if two values overlap with a range of other values

Not that I have friggatriskaidekaphobia or anything. But since today is Friday & 13th, lets put our Excel skills to test and find out when the next Friday the 13th is going to be.

Here is a new year gift to all our readers – free 2012 Excel Calendar Template.

This calender has,

» One page full calendar with notes, in 4 different color schemes
» 1 Mini calendar
» Monthly calendar (prints to 12 pages)
» Works for any year, just change year in Full tab.

Go ahead and download the FREE 2012 Calendar and Enjoy.

Chandoo is off on Holidays and once again thrown me the keys to Chandoo.org.

So this week we’re going to:

• Pull apart an Array Formula and see what’s under the hood;
• Have a look at a technique for quickly developing Custom Number Formats &
• Look at how we can use HTML Codes in posts at Chandoo.org to spice up your questions and answers.

Today is Tarun’s Problem

“I have got multiple names in each row and would like to have what name is repeated maximum number of times and how many times?”

Today we pull apart an answer to this question and see how it works.

Lets just say, you run a nice little orange shop called, “Joe’s Awesome Oranges“. And being an Excel buff, you record the daily sales in to a workbook, in this format. After recording the sales for a couple of months, you got a refreshing idea, why not analyze the sales between any given 2 dates? [...]

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.

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!
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.

Last week, we had a home work on Calculating Donation Summaries using Excel Formulas. This is a good case where array formulas can help us. So today, we will learn how we can use Array Formulas to compare lists of values and calculate summaries. Towards the end of this post, you can see a video that explains the solution to Donation Summary Calculation problem.

We have some home work folks! Today, lets test your Excel formula skills by giving some data related to a fund.

The problem:
You manage a fund for a non-profit. You have donors who pledge certain amount at the start of the year. As you go thru the year, the donors donate money to your fund. At the end of the year, you have a table like above. And you need to summarize the fund’s performance by calculating various statistics.

Go

How often have you had a simple table where you want to lookup a value or add up some values meeting a criteria?

This post looks at a simple way to do a 2D Lookup or 2D Sum of a values from within a 2D range with multiple criteria, without complex Sum, Offset, Index, Match, Sumifs or other functions, simply using Sumproduct

Here is a fun formula to write.

Given a number in cell, I want you to find the sum of digits in it. So, for eg. if you have the number 3584398594 in a cell, the sum would be =3+5+8+4+3+9+8+5+9+4, equal to 58.

Now, how would you write a formula to find this sum automatically based on the number entered in the cell?

Go ahead and figure it out. If you can, come back and check your answer with mine below.

We have a new series on chandoo.org. – Excel Challenges. From now, every 1-2 months, I will post an interesting Excel Challenge. These are tricky problems for which elegant solutions should be found. To keep the challenges exciting, we will have a small prize for a winner (if more people answer correctly, we pick one randomly)

Excel Challenge #1 – Find Overlaps in Machine Schedule Dates

We have an Excel Table, with the following data (snapshot above). You need to write formulas to display Ok or Not Ok in the adjacent column based on the following criteria:

1. Display Ok if the scheduling dates for that row do not overlap with remaining scheduling dates for that machine
2. Display Not Ok otherwise.

Today, we will learn an interesting array formula trick to test if a list is sorted or not. During last one week, I got 2 requests from different clients for some excel related work. Both of them had one thing in common. To test whether a list is sorted or not. So I got thinking, [...]