Using the XY_DATA Commands

Using the XY_DATA commands

The XY_DATA main menu is shown right.

Select States	Defines the time states used for output. (By default all states are preselected)
Three different data extraction and plotting methods are provided, and are descrived in more detail below: (1) Data vs Time Plots data (Y axis) vs time (X axis) (2) Data vs Data Plots data (X and Y axes) over a range of times (3) Composite Plots data (X and Y axes) for a range of items at a time. Output may be sent to any of:
XY Plot	On screen graphical tool that displays curves. It permits curve selection, zooming, labelling and symbol display; it also allows you to select a subset of curves to be written to file.
.cur Files	ASCII format files written in "curve file" (.cur) format. The default filenames will become "live" if you select this option, and you may use these or define your own names.
.csv Files	Comma Separated Value format files. The curves may be written in "X,Y,X,Y" or "X,Y,Y,Y" format. The default filenames will become "live" if you select this option, and you may use these or define your own names.

The data requested are extracted from the complete states as they are read in, and stored on scratch backing store. When everything has been read in then the file(s) are generated and the XY plot drawn according to what output has been requested. XY plot management is described in Using the XY graphical plotting tool, and file management in Managing "Curve" File Output.

The data on backing store is "remembered" until you leave the programme, or overwrite it by reading in some more results. So once a set of data has been created you can exit and re-enter XY_PLOT at will to review it.

Typical graphical output from XY_PLOT is shown in the figure below:

A typical file (the results for Material 1 above) is shown below. This is written in T/HIS "Curve" file format (see Section 4.8.5.5 for a description of this format):

$ ---------------------------------------------------------- $ D3PLOT "T/HIS_INTERFACE" output file. (22-Nov-95 20:22:11) $ Database file: /users/dyna70/test/lg09 $ Title: lg09 : Large Test 9: Belted sled test $ ----------------------------------------------------------

D3PLOT: Material data TIME KE_KINETIC_ENERGY
Material 1	Kinetic energy
.000000E+00	7.222228E-05
2.490001E-03	1.272031E+01
4.990020E-03	3.979501E+01
7.490039E-03	6.687062E+01
9.999956E-03	9.656306E+01
1.249986E-02	1.276856E+02
1.499976E-02	1.723507E+02
1.749984E-02	2.691978E+02
1.999997E-02	4.552962E+02
2.249011E-02	7.637439E+02
2.499991E-02	1.173867E+03