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16-22 Programming
→PLOT Puts graph from graphicname into the Plot view display.
→PLOT graphicname:
REPLACE Replaces portion of graphic in graphicname1 with
graphicname2, starting at position. REPLACE also
works for lists and matrices.
REPLACE
graphicname1;(position);graphicname2:
SUB Extracts a portion of the named graphic (or list or matrix),
and stores it in a new variable, name. The portion is
specified by position and positions.
SUB name;graphicname;(position);(positions):
ZEROGROB Creates a blank graphic with given width and height,
and stores it in graphicname.
ZEROGROB graphicname;width;height:
Loop commands
Loop hp allow a program to execute a routine repeatedly.
The hp 39g+ has three loop structures. The example
programs below illustrate each of these structures
incrementing the variable A from 1 to 12.
DO…UNTIL …END Do ... Until ... End is a loop command that executes the
loop-clause repeatedly until test-clause returns a true
(nonzero) result. Because the test is executed after the
loop-clause, the loop-clause is always executed at least
once. Its syntax is:
DO loop-clause UNTIL test-clause END
1
X A:
DO A + 1
X A
UNTIL A == 12
END