Graduate Thesis Or Dissertation
 

An interactive computer graphics system applied to the life sciences

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/s4655m02h

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  • Graph production by computer requires a blending of human effort in scale selection with computer precision in datum point placement. Existing techniques are designed primarily for computer scientists; the average scientific investigator, educator, or businessman tends to avoid them for one or more of the following reasons: expense, complexity, or excessive turnaround. This dissertation describes development and application of a graph preparation system designed for unsophisticated users which is moderate in cost, easy to use, and provides immediate interactive response. It is written in BASIC on a Univac 1108 and utilizes low cost Tektronix graphics terminals. Through menu selection, the user defines Scale factors, datum point indicators, axis type (linear or logarithmic), and adds optional functions which may be displayed superimposed on the data. Immediate display of the results to encourage user creativity in modification of parameters is an important feature of the system. Step-wise implementation, which maximized user input to system design, is described. Extensive modification of commercially obtained plot driving routines allowed expansion of program features in accord with user requests. Four detailed examples illustrate the use of the system by biologists and ecologists in communication of results and in analysis of data. A complete program listing and user's manual are appended.
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