We make charts with date axis all the time. For example, lets say you want to plot the number of donuts consumed per month in a chart, like this:
2 things become quite obvious when you look at this chart,
- The year -09 and -10 repeating across bottom of axis is pure chart junk.
- Aww, dude. How many donuts do you eat!?!
Now, there is nothing much I can do about donut consumption. But I can tell you how to fix that axis so it looks a lot better, may be like this:
Interested? Follow this simple recipe:
- Process your data: Assuming your data looks like what I shown to left, just use simple formulas to make it look like the table to right. [related: how to work with dates & times in excel]
- Now, make a chart from the data. Use both year and month columns for axis label series.
- That is all. Excel shows nicely grouped axis labels on your chart.
Pretty simple, eh?
Download the Excel Chart Template
Click here to download excel chart template & workbook showing this technique. Play with the formulas & chart formatting to learn.
2 Bonus Tips:
1. This technique really works with just any types of data.
So you can just have Product Group & Product Name in 2 columns and when you make a chart, excel groups the labels in axis.
2. Further reduce clutter by unchecking Multi Level Category Labels option
You can make the chart even more crispier by removing lines separating month names. To do this select the axis, press CTRL + 1 (opens format dialog). From Axis options, un-check Multi Level Category Labels option.
How do you format date axis on charts?
Most of the times when I make charts with date axis, the axis has 12 or 13 months of data. So I knock off the year part completely. But in some cases, I end up making charts that show data from multiple years. Now, repeating year value across bottom is a waste of chart ink. So I tend to use the above technique to make the chart look much more professional.
What about you? How do you format date axis? Please share your ideas and experiences using comments.
More Charting Formatting Tips:
- How to change data labels in charts to whatever you want
- Making your chart legends look awesome
- Use paste special to Speed up chart formatting
- … More chart formatting tips
14 Responses to “Group Smaller Slices in Pie Charts to Improve Readability”
I think the virtue of pie charts is precisely that they are difficult to decode. In many contexts, you have to release information but you don't want the relationship between values to jump at your reader. That's when pie charts are most useful.
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Chandoo,
millions of ants cannot be mistaken.....There should be a reason why everybody continues using Pie charts, despite what gurus like you or Jon and others say.
one reason could be because we are just used to, so that's what we need to change, the "comfort zone"...
i absolutely agree, since I've been "converted", I just find out that bar charts are clearer, and nicer to the view...
Regards,
Martin
[...] says we can Group Smaller Slices in Pie Charts to Improve Readability. Such a pie has too many labels to fit into a tight space, so you need ro move the labels around [...]
Chandoo -
You ask "Can I use an alternative to pie chart?"
I answer in You Say “Pie”, I Say “Bar”.
This visualization was created because it was easy to print before computers. In this day and age, it should not exist.
I think the 100% Bar Chart is just as useless/unreadable as Pies - we should rename them something like Mama's Strudel Charts - how big a slice would you like, Dear?
My money's with Jon on this topic.
The primary function of any pie chart with more than 2 or 3 data points is to obfuscate. But maybe that is the main purpose, as @Jerome suggests...
@Jerome.. Good point. Also sometimes, there is just no relationship at all.
@Martin... Organized religion is finding it tough to get converts even after 2000+ years of struggle. Jon, Stephen, countless others (and me) are a small army, it would take atleast 5000 more years before pie charts vanish... patience and good to have you here 🙂
@Jon .. very well done sir, very well done.
good points every one...
I've got to throw my vote into Jon's camp (which is also Stephen Few's camp) -- bars just tend to work better. One observation about when we say "what people are used to." There are two distinct groups here (depending on the situation, a person can fall in either one): the person who *creates* the chart and the person who *consumes* the chart. Granted, the consumers are "used to" pie charts. But, it's not like a bar chart is something they would struggle to understand or that would require explanation (like sparklines and bullet graphs). Chart consumers are "used to" consuming whatever is put in front of them. Chart creators, on the other hand, may be "used to" creating pie charts, but that isn't an excuse for them to continue to do so -- many people are used to driving without a seatbelt, leaving lights on in their house needlessly, and forwarding not-all-that-funny anecdotes via email. That doesn't mean the practice shouldn't be discouraged!
[...] example that Chandoo used recently is counting uses of words. Clearly, there are other meanings of “bar” (take bar mitzvah or bar none, for [...]
[…] Grouping smaller slices in pie chart […]
Good article. Is it possible to do that with line charts?
Hi,
Is this available in excel 2013?