This is a guest post from Aaron Henckler.
Waterfall charts are great, especially for visually showing the contribution of parts to a whole. While there are several tutorials on how to make a waterfall chart online the end products of these tutorials rate low on the visually appealing scale.
The principle problem with these charts is the separation between the elements of the waterfall. They are always either pushed together (Example A) or left apart, without element connectors (Example B):
Example A
Example B
Many users of waterfall charts employ the separated (default) version (example B) opting to add in element connectors manually via Insert>Shapes>Line on the Excel tool bar. The frustration with this approach is that all too often the values of the chart elements will need to be updated or changed forcing user to manually readjust each of their connector lines in turn.
With some simple charting trickery in Excel 2007 one can easily make a waterfall chart with connectors that will update automatically as element values are changed.
A Better Waterfall Chart
Steps to Building a Better Waterfall Chart
List of data series (columns) needed for your chart:
- Horizontal Axis Labels: in the example above North, East, South and West.
- Base Values: What your element values will “sit on.” Essentially this is the white space beneath each charted element shown above.
- Element Values: the meat and potatoes of your chart – the value of your elements as you want them to appear (above these are 40, 30, 20, 10 and 100).
- Label Spaces: This is optional but it allows you to place the value of you data elements on top of their respective bars (this avoids the use of the annoying Label Position options available after one has used Add Data Labels).
- Label Connectors: This is the key item needed to create the chart as shown above. You will need one column (series) for each of the data elements (excluding one for the total). For the chart above, four label connector series are needed.
Step 1: Enter all of the required series in a worksheet:
- Horizontal Axis Labels – self explanatory
- Base Values – A running total of the subsequent Element Values (Column C). Whereas nothing proceeds North in the example above leave its base value blank. Do the same for Total.
- Element Values – These are whatever numbers you want to highlight in your chart. These are represented by the blue column segments in the above chart.
- Label Spaces – Again this is optional. These will eventually hold text labels for the Element Values (Column C). The numbers here should all be the same and be some number about 1/4 to 1/3 the value of your lowest Element Value.
- (to H. ) Connectors – Connectors 1 to 4 correspond to Axis Labels North to West in the example above. In the respective Connector column make the cell at the row corresponding to the related Axis Label equal to the sum of Column B + Column C (Base Value + Element Values). Enter the same value for the cell beneath.
Step 2: Chart data and adjust
1. Select your data, here A2:H6, and go to Insert>Charts>Column>2-D Column>Stacked Column>OK (to exit). Your chart should look like this:
2. Switch column and row data by right-clicking within the chart and going to Select Data…>Switch Row/Column>OK (to exit). Chart should now look something like this:
3. The top colored column element in each column (purple, aqua, orange and baby blue, respectively) is what will become that Element Value’s connector. To convert to these columns to connectors, in turn, right-click on the series (the first one is the purple column element) and go Change Series Chart Type…>Line>Line>OK (to exit). Repeat this process for the other connector column elements (aqua, orange and baby blue). After this step your chart should look like this:
4. Follow this up by formatting each connector in turn. Right-click on the connector and go Format Data Series…. Consider making the Line Color>Solid Line>Color black, Line Style>Width .25 pt and Line Style>Dash Type>Square Dot. Play around with these options as you see fit to get the best look. Again, do this for each connector.
5. Remove grid lines (optional), delete the Legend (necessary). Your chart should now look like this:
6. Go into you Base Values series (blue column element in the chart above) and eliminate the color fill and borders: right-click on a blue column element and go Format Data Series….>Fill>No Fill and Border Color>No Line>Close (to exit).
7. Format your Element Values series (red above, using same process in Step 6 to change the fill color and add a border.
8. Right-click on your Label Spaces series and go Add Data Labels…. Don’t worry about the value on the labels for now, they’ll be changed in the next step. Follow this up by formatting the Label Spaces series just like how the Base Values series was formatted (in Step 6). Make it so there is no fill and there are no borders. This is what you should now have:
9. All that remains is to convert your labels to the values of the Element Values. To do this for each label: click on the specific label twice (so that only the box for that label appears, as below).
Click a third time on the edge of the box that appears and then type the equals sign “=”. Now go back to your data table and click on the cell of the Element Value that you want appear in the label. Then press enter. This links the value of the label to the Element Value (if your Element Value ever changes so too will the text in this label). Repeat this for the other data labels in turn. The result is your Better Waterfall Chart:
Download the Waterfall Chart Template:
Please download the waterfall chart template from here [.zip version here]
Final Thoughts
I hope you will agree that this waterfall chart is more visually appealing that the examples at the start of this tutorial. In addition to a more professional look this waterfall will fully update (step heights, labels, connector positions) automatically whenever you change your Element Values. While the process of implementing this form of waterfall chart may at first seem cumbersome it can be quickly implemented with some practice and is a great item to have in your charting toolkit. Enjoy.
Note from PHD:
- Thank you so much Aaron. You have taught us a very valuable tutorial. I really appreciate your effort in putting this together.
- If you need to make a lot of waterfall charts, I recommend trying Jon Peltier’s Waterfall Chart Utility.
Hello there, Reader: If you like this waterfall chart tutorial, please drop a note of thank you to Aaron through comments.
37 Responses to “Pie of a Pie of a Pie chart [Good or Bad?]”
If I could have the same quality of graphics and illustration in Office Apps, I would certainly use it.
If I could have the same quality of graphics in Office Apps (Excel, PPT) I would certainly use it.
Chandoo,
First, let me say I love your blog. I like this post, and I think that technically (in terms of readability of data) your argument is correct. The bar of bars, and the table, are much better for readability and accuracy, and as you say would be much easier to produce.
But these points ignore the context of the chart. If the chart was part of a scientific paper, your solution would be a valid one. The context in this case is an illustrated atlas of wildlife. A companion graphic to go with written text. The importance of aesthetic goes up over readability and accuracy. Much of the data and points (I assume) will be covered in the text.
There's always a pure technical tufte-esque argument. But I sometimes think it ignores the value of aesthetics. (Which I admit are quite subjective)
Great post though. Thanks.
The Treemap makes the scope of the data much clearer! The 3D pie chart depiction is deceptive.
This reminds me of the videos ive seen on the internet where it compares the relative sizes of the earth with the larger planets, then the sun, then other stars in the galaxy. Eventually there is an image showing the largest star in the sky with a little pixel representing the sun.
My point is if you varied the size of the charts it would help convey the message. The first chart (salt vs fresh) would be the biggest and the rest would be arranged in descending order. I feel this would be more accurate.
It may be helpful to consider the advice of Steven Few and Edward Tufte regarding pie charts in general. To summarize, they are seldom the most useful way to present data. Here's Few's thoughtful piece on the subject.
http://www.perceptualedge.com/articles/08-21-07.pdf
Try putting the percentages on the bar charts instead of actual amounts. Lakewater would be .013 % instead of 52.
That is very good pie chart example.
Please send example file if it is possible.
It will work , even though colors may be confusing , it can be labeled well . Also it can be called as the drilled chart , as it drills in information further , like the first chart may show business in a region , second may drill into a particular region , thrid may further drill into wat products are there in that region . It works well for me , i would more vote for the 2 nd option .
Overall all this site is awesome ,
p.s : just like me
The risk with pie of a pie of a pie chart is that Jon may have a seizure by looking at it. Also, it isn't easy to read. 😉
I dunno. The only thing worse than a pie chart is a cascading series of pie charts. I don't even think they really lend themselves to this sort of thing. It just becomes a big hide-the-ball game with your viewer.
Those goofy connectors between the pies are pure chart junk. I can't really tell if the second chart has 2 series or 3 - because the connector is a different color than the 2 labeled slices. Despite that, even whereas the drill down kind of works, still the individual components suffer from the same old weaknesses that 3d pie charts have.
Use a large bar chart as your "cover story", and fill in the sub points with smaller bar charts - or even go grab the Fabrice SFE project for extra butter. Use page orientation, color, and some text styles to guide your audience through the drill downs.
FWIW, if you check out the guy's site, you can find several other truly mortifying charts:
http://www.andrewdavies.com.au/index.html
The methane emissions one is particularly heinous. Although, I'm kind of debating what I think about the 'Glacier Changes" chart. I'd kind of like to see the data on that to see how it would look in a more traditional horizon chart.
Thank you, that was scary. I don't understand the "Glacier changes" Chart at all...
Its a very nice way to represent the data, especially when we have sets and sub-sets within the data.
I like these!
Except for the fact that they aren't dynamic and hence must be setup manually each time
It would also be nice if they could be interrogated as in select a different segment and the new data falls out automagically, but then none of the standard Excel charts do that either.
I'd like it better if the bars were stacked. How about this idea (I hope I can convey it in words):
First bar is vertical and stacked.
Second bar is horizontal, stacked horizontally and the same proportion had it been on the first bar.
Third bar is vertical, stacked vertically and the same proportion had it been on the second bar.
Then it would really look like you are zooming on the chart, like the Powers of Ten video, or maybe like the golden ration spiral.
These looks shunting but setting up for each step makes kicks them out. However if these can be arranged automatically by native excel or by VBA, these will be the part of my "Archery"
I agree with Chandoo's Suggestion about the Bar Graph which represents data in a very appropriate manner. Even I prefer doing the same. I seldom use Pie Chart unless required.
That's a real nice example of a missleading infographic. But to be honest, I think chandoos suggestion is not much better!
Why are pie charts bad? I think because they don't show the real size-relations. The biggest pie in that example ist 300k big. The 2nd one has only the size of 10k, about 3% of the first one. Niether the pies nor the bars show the real sizes. I jnow, it's hard to show the sizes because the values of the second and the third pie are so small. But that's what visualization are about - showing relations to allow the reader to see the real sizes!
So how to show the real figures?
First possibility is o use a 1:1 scaling. Well then, you need a very big screen to show also after a 90° rotation, wihich I would prefer because it's a structural comparison and not a timeline. Maybe that solution is not the perfect way.
The other chance you have is to zoom in but to really show that you zoom in! http://www.pro-chart.de/images/Water_Fall.png maybe gives you a first impression what i mean. (i was a quick try, done in 10 minutes)
The next way is, maybe to fold the bars like in the financial report 2011 of the Post of Switzerland page 22. That chart is based on an excel chart. Maybe can explain you how to do it 😉
Financial Statement: http://www.post.ch/en/post-startseite/post-berichterstattung/post-berichterstattung-service/post-berichterstattung-downloads/post-gb-2011-finanzbericht.pdf
page 22: http://www.pro-chart.de/images/FS_Schweizer_Post.png
A way that is not so very common is to divide the bars in a lot of single datapoints. So maybe the 390k bar then consists of about 5,000 single datapoint. That's not possible - it is! Have a look:
http://www.pro-chart.de/images/Dotted_WF.png
It's pure excel!
Now one single point ist 0,2% of the whole (in the example above). Add more datapoints and you can visulize the very big and the very small numbers!
Wish you a lot of fun - visualizing with excel can be very powerful!
Joerg
...if you would like to know how these charts work, just send an email to J.Decker@pro-chart.de
Hey Joerg,
I don't dig so much the dotted waterfall thing. But this is kind of awesome:
http://www.pro-chart.de/images/FS_Schweizer_Post.png
Can you help me on the bar of bar graph? Would it be possible to create that from pivot table? Can you show me how to create the bar of bar graph?
do nothing but say "Awesome!"
You are a Rock star.....This seemed an answer as if someone was reading my mind and just had the solution to my questions on what I exactly was looking for .....What a Fab !!
can u explian me step by step
Can anyone please explain how to make this chart please.
Do you mean the pie of a pie chart or the folded bar chart?
Joery PIE OF PIE Chart please
Can someone please explain how to make PIE OF PIE Chart.
@Mandeep
The last line of the post is:
PS: If you want to know to create this pie of pie of pie chart in excel, see here.
Due to forum migration, link is now:
http://chandoo.org/forum/threads/multiple-pie-chart.7343/
Hi... i love these charts.... can any one show me how to draw these charts in excel 2010
@Vamshi
The very last line of the post refers you to:
PS: If you want to know to create this pie of pie of pie chart in excel, see here. http://chandoo.org/forums/topic/multiple-pie-cahrt
Where is the attachment....it used to be there...i have seen this before but now i am not able to find...
See this:
http://img.chandoo.org/playground/WaterDistribution-chandoo.xlsx
And this:
http://chandoo.org/forum/threads/how-do-you-create-this-chart.9743/
Normally I don't learn post on blogs, however I would like to
say that this write-up very compelled me to try and do so!
Your writing style has been amazed me. Thank you,
quite great article.
This is very impressive, I would like to learn how to build this for myself. I have tried for some time now, is there a step by step process on how to create these waterfall pie of pie charts?
I am novice to excel and use it very seldom. But your blog contains to the point information one needs to get going.
I was searching for a trick to do a Pie chart drill down - for example the first pie chart shows how the prices are distributed between perishable and non-perishable items.
Now if we want to know how the perishable items are distributed - one can click the segment and it will draw another pie chart with distribution of all different perishable items (milk,meat,fruit,veg etc)
So do you have any such trick?
Regards,
electrojit
I like the look of your pie of pie of pie chart, although I understand that the relative size of each pie does not represent the actual percentages.