Course Title: Using Epi Info™ 7Using Classic Analysis (continuation)

April 17 2012

Epi Info™ TrainingEpi Info™ Training

Software for Public Health Software for Public Health

Epidemiology and Analysis Program Office

Office of Surveillance, Epidemiology, and Laboratory Services

Module 6 – Part III OutlineModule 6 – Part III Outline

Generating Graphs PowerPoint Slide Presentation

Instructor demonstration of Graphs Students practice

Classic Analysis: Creating GraphsClassic Analysis: Creating Graphs

You will use the GRAPH command to create graphical representations of your data.

The GRAPH command

offers many types of graphs for displaying the values of one or more fields in a data table.

GRAPH Dialog BoxGRAPH Dialog BoxFrom the Graph dialog box, you will select a Graph Type, an X-Axis variable, a Y-Axis variable, and a Series variable by using the corresponding drop-down boxes.

Types of GraphsTypes of Graphs

BAR

Bar Graphs are used to group data together according to categories and display a bar for each value in that category.

Bar lengths represent quantities in a set of data.

Bars are color-coded according to the series represented and displayed vertically.

 

Types of GraphsTypes of Graphs

EPI CURVE

Epi Curve use vertical bars to represent the count or weight for each value of the main variable.

Each series results in an additional vertical bar at each point. The main variable must be numeric.

This graph differs from the bar graph in that adjacent bars represent equal ranges of the main variable.

Types of GraphsTypes of Graphs

COLUMN Columns are generated with horizontal bars

representing the count or weight of each value of the main variable (s).

PIE A pie graph is a circular graph used for

proportional assessment by comparing data elements such as percentages or counts against other data elements and against the sum of the data

Types of GraphsTypes of Graphs

LINE Line graphs are used to determine trends and

cyclic variation based on interaction of data elements.

Data points are plotted on the graph and connected with lines.

Line graphs must have numeric variables for both X and Y-axes and the X variable values are treated as continuous. 

AREA Area graphs display data sets on X-Y with the area

under the line filled.

For more information please contact Centers for Disease Control and Prevention1600 Clifton Road NE, Atlanta, GA 30333Telephone, 1-800-CDC-INFO (232-4636)/TTY: 1-888-232-6348E-mail: cdcinfo@cdc.gov Web: www.cdc.gov

Questions?

Office of Surveillance, Epidemiology, and Laboratory Services

Epidemiology and Analysis Program Office

The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.