A simple method for obtaining original data from published graphs and plots.
OBJECTIVE
To describe a method for deriving original data values from scanned images of graphs and scatterplots published in the medical literature.


CONCLUSIONS
The procedure is simple, reproducible, and relatively error free (when performed carefully). This method is useful in converting published graphic material into numeric data for various uses when the original data are unavailable directly from the authors.
Sistrom
C L
CL
Department of Radiology, University of Florida College of Medicine, Gainesville 32610-0374, USA.
Mergo
P J
PJ
D003627:Data Interpretation, Statistical; D009716:Numerical Analysis, Computer-Assisted; D012984:Software