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Last modified: December 2012

URL: http://cxc.harvard.edu/chips/current_point.html
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AHELP for CIAO 4.5 ChIPS v1

current_point

Context: points

Synopsis

Set the specified point as current.

Syntax

current_point( ChipsId )
current_point( "point_id" )
current_point( "all" )

Description

The current_point command sets the point indicated by the argument as the current point; see "ahelp currency" for general information on currency.

  • ChipsId - an optional ChipsId structure containing values to modify the currency state for the command.
  • point_id - identification tag given to each object that is created; use this to select a specific point.
  • all - sets all points to be current.

Use the info_current command to retrieve a list of all the current items in the ChIPS session, as shown in Example 1.

Example 1

chips> id = ChipsId()
chips> add_point(.4, .5, "id=sq style=square")
chips> add_point(.8, .2, "id=tri style=uptriangle size=12")
chips> add_point(.6, .5, "style=plus")
chips> id.point = "sq"
chips> current_point(id)
chips> info_current()

Three points are created; the second point is current after it is created. The id.point command sets the point value of the ChipsId structure to the first point, then the current_point command makes that point current.

The output of info_current for this session is:

Window [win1]
  Frame [frm1]
    Plot [plot1]
      Point [sq]
    Coord Sys [Plot Normalized]

Example 2

chips> add_point(.4, .5, "id=sq style=square")
chips> add_point(.8, .2, "id=tri style=uptriangle size=12")
chips> add_point(.6, .5, "style=plus")
chips> current_point("sq")

Three points are created. After the second point is created, it is current. The current_point command then sets the first point as the current point.

Example 3

chips> add_point(.4, .5, "id=sq style=square")
chips> add_point(.6, .5, "style=plus")
chips> current_point("all")

Two points are created. After the second point is created, it is current. The current_point command then makes all points current.

Bugs

See the bugs pages on the ChIPS website for an up-to-date listing of known bugs.

See Also

concepts
chipsid, currency
points
add_point, delete_point, display_point, get_point, hide_point, move_point, set_point, shuffle_point

Last modified: December 2012
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