Abstract: An apparatus and method for determining the course of a patient's illness and response to treatment. The system uses a matrix of coordinated, nonlinear time plots to guide diagnosis and record treatment. The preferred method comprises representing patient findings and treatments as a matrix of small graphs each comprised of a label, the numeric value of the most recent plotted value, plotted values themselves and axis markers. The graphs are coordinated so that plots in the same column share the same horizontal time axis and plots in the same row share the same vertical clinical value axis. Nonlinear scales are used to allow both recent and historical trends to be presented on the same axis and to allow various clinical values to be presented on the same axis. The system also presents a small of amount of textual information about the patient to identify and annotate the graphical presentation.