I’ll be using the Sample project that’s
included with Epi Info. You can open it up
and follow along. I’m in the Visual dashboard and I have the Sample project open with the
Estriol and Birth-weight form open. At the
top you can see we have 31 records in this
dataset. Now I’ll navigate to the Scatter
chart analysis gadget. A scatter chart lets
you visualize the relationship between two
variables, typically continuous variables.
In this dataset, the main variable is Estriol
and the outcome variable is Birth weight.
And I’ll click Run. Here’s the scatter
chart. The red dots are observed levels of
Estriol and birth weight in the 31 patients.
The blue line is the regression line fitted
to the 31 points. The formula for the line
is in the upper left corner and you can move
the mouse over the dots and see their value. Now let’s look at display options. I'll
go back to the configuration panel, and click display options. I can change the color palette.
I can change the marker type. In labels I
can change the Y axis label. I can change
the X axis label type from automatic to field prompt, none, or custom. Automatic is the
default. Field prompt is only in Epi Info
projects and Custom means that I can type
in any label. I'll skip that label. The X
axis angle, by default, is set at zero, but
you can change that. However, if Epi Info
detects that the labels will overlap it will
not show them. If you change the angle and they still don't show then you'll need to
change the width of the chart. I'm going to
skip the chart title and in the legend box
I'll click Show legend. And now I’ll click
Run. And here's the scatter chart with the
new palette and the legend on the right. You have just been shown how to create a scatter
chart in Epi Info 7, in the Visual Dashboard. Thanks for watching and look for more user
support videos coming soon.
