Figure 5. The graph command has many available options. More complicated data can be graphed in three dimensions. There are several types of 3-D graphs, including contour plots and surface plots. The ...

A graphic approach to cohort analysis using quasi-scenic rendering of cohort surfaces and contour graphs produced with GRAFTOOL is discussed as a teaching strategy for understanding stability and ...

Field experiments were conducted in 1986, 1987, and 1988 to evaluate imazethapyr rate and time of application on postemergence control of 24 weed species. Contour graphs were developed that predicted ...