RSIC COMPUTER CODE PSR-054

1. NAME AND TITLE

INTRIGUE-II: Logarithmic and Semilogarithmic CALCOMP Plot Routines.

INTRIGUE-II is a greatly modified and extended version of the original INTRIGUE. This version of INTRIGUE-II differs only in respect to letter and label size which are larger in INTRIGUE-II-L and, therefore, more suitable for reduction for publication purposes.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran IV and Assembler Language; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

INTRIGUE-II makes linear, logarithmic and semilogarithmic graphs using the CALCOMP plotter. A wide variety of options is available including type of plot, method of presenting data (points only, connected points, histograms, etc.), size of grid and placement of legends. Modifications include variable height, dashed lines for connecting points, placement of a legend within the grid lines, and insertion of a numerical value or a Greek letter symbol in the titles.

5. METHOD OF SOLUTION

The plotting data is written on a 9 track 1600 bpi magnetic tape which is then mounted on a tape unit of the CALCOMP pen-and-ink plotter for plotting. INTRIGUE-II computes the incremental steps necessary to move the plotter from its current (X,Y) position to the (X,Y) position given in the calling sequence. The data generated are stored in an array and written onto magnetic tape each time the array is filled or when an end-of-graph call is given. Sequential graph addresses are generated for each graph written and the graph address is displayed to the CALCOMP operator as plotting progresses.

6. RESTRICTIONS OR LIMITATIONS

There is a data buffer 5000 words long which might require a reduction on a computer with small core size. Users must have the basic CALCOMP plotting routines for their particular CALCOMP configuration.

7. TYPICAL RUNNING TIME

On an IBM 360/91 computer, one plot should take less than 30 seconds of machine time to generate.

8. COMPUTER HARDWARE REQUIREMENTS

INTRIGUE-II is operable on the IBM 360/370 computers. It requires about 9600 single precision words of which 5000 is the data buffer mentioned above. The plotting data is written on a 9 track 1600 bpi magnetic tape which is then mounted on a tape unit of the CALCOMP pen-and-ink plotter for plotting

9. COMPUTER SOFTWARE REQUIREMENTS

Fortran IV and Assembler Language compilers are required. The basic CALCOMP plotting routines for the user's computer are required.

10. REFERENCES

M. B. Emmett, "INTRIGUE-II: An IBM-360 Subroutine Package for Making Linear, Logarithmic and Semilogarithmic Graphs Using the CALCOMP Plotter," ORNL-4664 (March 1971).

M. B. Emmett, "INTRIGUE-II-C: An IBM-360 Subroutine Package for Making Linear, Logarithmic and Semilogarithmic Graphs Using Either the CALCOMP Pen-and-Ink or Cathode-Ray-Tube Plotter," ORNL-TM-3947 (October 1972).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one (1.2MB) DOS diskette which contains the source code.

12. DATE OF ABSTRACT

January 1984; updated March 1985.