Here is a quick visualization challenge for you.
There are 25 KPIs and each has a base value, current month, corresponding month values. The KPIs also have targets.
The data looks like this:
Download the data:
Click here to download the data for this contest.
Rules for this contest:
- Visualize this data using one Excel chart (one chart per KPI is ok too).
- You may omit any data
- You can use interactive charts.
- Do not use add-ins or VBA to make your charts
Go ahead and make your chart(s).
Last date & how to submit:
- Last date for this contest is 1st November, 2015 (Sunday).
- Once your chart is ready, email the workbook to chandoo.d@gmail.com with the subject “KPI contest“
- Winners will be announced in 2nd week of November, 2015.
What do winners get?
After carefully reviewing all the charts, 2 winners will be selected by our panel of judges. Each of them will get $100 Amazon gift card.
So what are you waiting for. Go ahead and visualize the data and show us how awesome you are.
Thanks to shaikhrulez @ Chandoo.org forum
Thanks to shaikhrulez at Chandoo.org forum for the data & question that became this contest.
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...