Jo (wife) likes to watch Masterchef Australia (link), a cooking reality show every night. Even though I do not find contestant’s culinary combats comforting, occasionally I just sit and watch. You see, I like food.
The basic premise of the program is who cooks best in given time. To tell people how much time is left, they use a clock that looks like this:
The needle indicates how much time is left (much like a stop clock, with a small twist).
One day, while watching such intense battle, my mind went
- It be cool to make such a clock using hmm… Excel?
- Wouldn’t it be cool to grill a snapper & eat it than watch someone else do it
While I cannot share my snapper (or pretty much any other food item) with you, I can share my Masterchef style Excel clock with you. So behold,
Here comes the Masterchef style Clock in Excel
How is it cooked?
Don’t you worry. This recipe is not as complicated as a Masterchef recipe. With enough time & trigonometry, anyone can do it.
The clock (chart) has 2 parts. Dial & rotating hand.
While we can create both of them in one chart, I choose the path of least resistance i.e. Make one chart each for Dial & Hand and overlap them nicely.
Making the Dial
This is simpler than it looks. All we need is numbers 60 thru 5 (60,55,50…10,5) in a range & twelve 1s in another range. Then, we select both and make a radar chart. Once you adjust it, it should look like this:
Making the Rotating Hand
The hand is nothing but a line on a scatter plot with (0,0) as one point & (x,y) as another point. To calculate (x,y) we need to know how many degrees our hand should be rotated.
Hand of our clock starts at 60 and rotates clock-wise (duh!). That means if the time completed is 5, our clock’s hand should be 300 away from initial position.
Thus, x = sin(300), y = cos(300)
Same in Excel would be SIN(RADIANS(30)), COS(RADIANS(30))
For more on this calculation, refer to Spoke Chart Technique.
Running the clock (using VBA)
Our job is not done when the clock is assembled. We must give it batteries thru VBA.
The basic logic for running the clock is simple:
- When clock is running
- Check if it next second yet
- Move the hand (by modifying the value of done seconds)
- If not, just wait
You can see the code (and break it if you must) in the download file.
Download Excel Clock & Play with it
Click here to download this clock. Examine the macros assigned to the buttons. Play & Pause the clock.
Do you watch Masterchef?
Of course I am kidding. What I am really keen to know is do you make any clock / timer related things in Excel? I use timer features often to add animation, count-down features to my workbooks. They work really well.
What about you? Have you used such techniques? What is your experience? Please share using comments.
PS: If you must know, I prefer Amazing Race to Masterchef. I guess I get more pleasure watching people run around globe than run around in a kitchen.
More Charting Recipes
If you like a well cooked chart, we have got one too many in our pantry. Check out,
- Spoke chart in Excel
- Grammy bump chart
- Competitive Analysis Chart
- Polar Clock in Excel
- Data around the clock
Or consider joining my Excel School program to cook fine Excel workbooks & charts. Click here.
8 Responses to “Pivot Tables from large data-sets – 5 examples”
Do you have links to any sites that can provide free, large, test data sets. Both large in diversity and large in total number of rows.
Good question Ron. I suggest checking out kaggle.com, data.world or create your own with randbetween(). You can also get a complex business data-set from Microsoft Power BI website. It is contoso retail data.
Hi Chandoo,
I work with large data sets all the time (80-200MB files with 100Ks of rows and 20-40 columns) and I've taken a few steps to reduce the size (20-60MB) so they can better shared and work more quickly. These steps include: creating custom calculations in the pivot instead of having additional data columns, deleting the data tab and saving as an xlsb. I've even tried indexmatch instead of vlookup--although I'm not sure that saved much. Are there any other tricks to further reduce the file size? thanks, Steve
Hi Steve,
Good tips on how to reduce the file size and / or process time. Another thing I would definitely try is to use Data Model to load the data rather than keep it in the file. You would be,
1. connect to source data file thru Power Query
2. filter away any columns / rows that are not needed
3. load the data to model
4. make pivots from it
This would reduce the file size while providing all the answers you need.
Give it a try. See this video for some help - https://www.youtube.com/watch?v=5u7bpysO3FQ
Normally when Excel processes data it utilizes all four cores on a processor. Is it true that Excel reduces to only using two cores When calculating tables? Same issue if there were two cores present, it would reduce to one in a table?
I ask because, I have personally noticed when i use tables the data is much slower than if I would have filtered it. I like tables for obvious reasons when working with datasets. Is this true.
John:
I don't know if it is true that Excel Table processing only uses 2 threads/cores, but it is entirely possible. The program has to be enabled to handle multiple parallel threads. Excel Lists/Tables were added long ago, at a time when 2 processes was a reasonable upper limit. And, it could be that there simply is no way to program table processing to use more than 2 threads at a time...
When I've got a large data set, I will set my Excel priority to High thru Task Manager to allow it to use more available processing. Never use RealTime priority or you're completely locked up until Excel finishes.
That is a good tip Jen...