When running under X windows, mouse button 2 toggles the continuous display of the graphics cursor location. The PHYSICA keyword CUNITS is the units type for these numbers. If CUNITS = WORLD, the numbers depend on the current units type, either CM or IN, as chosen with SET UNITS. If CUNITS = GRAPH, the numbers displayed depend on the current graph axis scales. If CUNITS = PERCENT, the numbers depend on the current window.
key action
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D digitize the current crosshair position and display the
coordinates corresponding to that location
R same as D, but also record the coordinates, in graph units,
of that location in the optional vectors xout and yout,
record the interpolated value of curve ni in vector yi.
The number of recorded points is displayed
(under X, mouse button 1 is the same as R)
M same as R, but place a marker at the recorded location
C same as M, but also connect that point with a line
segment to the last recorded point
Q quit picking points
Syntax: PICK\NPTS num xout yout { y1 { n1 } y2 { n2 } ... }
Defaults: \NONPTS
If the \NPTS qualifier is used, the first command parameter is assumed
to be the maximum number of points that will be recorded. The command
will automatically stop when num points have been recorded.
Default: \DISPLAY By default, the key code menu is displayed in the terminal window, and the (x,y) locations of the points chosen are also displayed. Use the \-DISPLAY qualifier to turn these displayed messages off. This only applies to the default PICK, that is, picking points off a graph which is currently displayed on the monitor screen. It does not apply with the \MATRIX, \POLYGON, or \COUNTS qualifiers.
Syntax: PICK xout yout y1 { n1 } y2 { n2 } ...
PICK\NPTS num xout yout y1 { n1 } y2 { n2 } ...
It is possible to automatically digitize points off of previously
drawn data curves by making use of the optional parameters yI
(vector name) and nI (number). Assuming that the total number of
curves that have been plotted on the currently displayed graph is at
least nI, then the coordinate corresponding to the horizontal
(independent) location of the crosshair will be interpolated on the
nI_th curve and saved in the vector yI. Linear interpolation is
used, and extrapolation is allowed. If the number nI is not present
following the vector yI, then nI defaults to I.
Additional Information on:
Syntax: PICK\POLYGON xp yp The \POLYGON qualifier indicates that you are picking vertex points for a polygon. A final point is added after you quit picking, which will be the same as the first point picked, thus closing the polygon.
Syntax: PICK\MATRIX nrow ncol mxout myout
PICK\MATRIX\MIN { xin yin } matrix mxout myout
PICK\MATRIX\MAX { xin yin } matrix mxout myout
Defaults: xin = [1;2;3;...], yin = [1;2;3;...]
The PICK\MATRIX command allows the user to pick points off the screen
using the graphics crosshair. The x coordinates of the points are placed
in matrix mxout, while the y coordinates are placed in matrix myout. You
must specify the size of these output matrices in nrow, the number of
rows, and ncol, the number of columns. Both mxout and myout will be
created with the same dimensions. This feature was included to be used
in conjunction with the BIN2D\MATRIX command.
Additional Information on:
PICK\COUNTS { xin } ydata counts
Defaults: xin = [1;2;3;...]
The PICK\COUNTS command allows the user to pick pairs of points off the
screen and the number of counts of the vector ydata inside that region
will be displayed on the screen and stored in the output vector, counts.
The input vector xin should contain the x coordinates for the data yin.
xin defaults to [1;2;3;...] if not entered.
Additional Information on: