HP 50g User Manual page 740

Data set 1
Note: The program FRAME, as originally programmed (see diskette or CD
ROM), does not maintain the proper scaling of the graph. If you want to
maintain proper scaling, replace FRAME with the following program:
« STO
MIN
DUP NEG SWAP 2 COL
R B SWAP yR OBJ
PDIM yR OBJ
This program keeps the width of the PICT variable at 131 pixels – the minimum
pixel size for the horizontal axis – and adjusts the number of pixels in the
vertical axes so that a 1:1 scale is maintained between the vertical and
horizontal axes.
Pixel coordinates
The figure below shows the graphic coordinates for the typical (minimum)
screen of 131 64 pixels. Pixels coordinates are measured from the top left
corner of the screen {# 0h # 0h}, which corresponds to user-defined coordinates
x y
0.4 6.3
1.0 4.9
2.0 4.3
3.4 3.0
4.0 1.2
5.8 2.0
7.2 3.8
7.8 5.3
9.0 7.2
MAX 2 COL
+
DROP – xR OBJ
DROP YRNG xR OBJ
Data set 2
0.7
1.0
1.5
2.2
3.5
4.5
5.0
6.0
7.1
8.0
9.0
10.0
10.5
11.0
DUP COL DROP – AXL ABS AXL 20 /
ROW DROP SWAP
DROP - / * FLOOR R B
DROP XRNG ERASE » »
x y
4.8
3.0
2.0
0.9
0.4
1.0
2.0
2.5
2.0
0.7
0.0
1.5
3.4
5.0
yR xR « 131 DUP
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