A
Dot Plot or
Dot Chart is one of the most simple types of
plots and they are very easy to create in Excel without having to use a
Chart object. The trick is to use the REPT() function to display the
dot plot either horizontally or vertically. I will explain how this is
done and you can download the
Dot Plot Example file to see how I created the dot plots on this page.
Download the Example Dot Plot (dot-plot.xls)
Horizontal Dot Plot
I like board games. The example dot plot below shows the number of
times out of 50 that I rolled a 1-6 with a single die. Actually I
cheated because these values were randomly generated in Excel (see the
example file). But it demonstrates the point.
Fig 1. A Horizontal Dot Plot
A horizontal dot plot is probably the easiest type to create. Just
list the category labels in column A. Then in column B enter the
corresponding numbers. To create the dots for the dot chart in column C
enter the formula =REPT("•",B1) or =REPT(CHAR(149),B1) and then copy the
formula down. Then, hide column B. Pretty simple, eh?..
Vertical Dot Plot
One of the games I like to play is Settlers of Catan. If you're
familiar with this game, you may recognize why I used the following
example vertical dot plot.
Fig 2. A Vertical Dot Plot
The trick to creating a vertical dot plot is to simply change the
orientation of the text within the cells to vertical. Otherwise, the
procedure is pretty much the same as the horizontal dot plot.
Spice up the Dot Plot
When you use this approach to create dot plots, you can change the
color of the dot chart by just changing the font color. In the example
below, I've used conditional formatting in Excel to automatically make
the maximum value red.
Fig 3. Using conditional formatting to highlight the Max
Tip: If you want a larger dot without increasing the font size, you can use the WingDing font and the letter
l (el) for the repeated character.
Warning: Make sure you use the same characters and fonts for
all the dots or you could end up misrepresenting your data by making one
set of dots larger, and therefore longer, than the others.
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