mirror of
https://github.com/PDP-10/stacken.git
synced 2026-03-01 17:26:38 +00:00
39 lines
1.6 KiB
Plaintext
39 lines
1.6 KiB
Plaintext
INSTRUCTIONS FOR THE USE OF PLOTT. (2/10/77)
|
|
|
|
|
|
ACCESS THE PROGRAM BY TYPING 'RUN D11:PLOTT'
|
|
|
|
PLOTT IS A GENERAL PURPOSE PROGRAM WHICH ACCEPTS PAIRS OF DATA POINTS
|
|
(WHICH COULD BE EXPERIMENTALY GATHERED) AND PLOTS THEM ON AN X-Y AXIS.
|
|
THE PROGRAM WILL REQUEST THE DATA AS ORDERED PAIRS. THE X VALUE THEN A
|
|
COMMA,THEN THE Y VALUE AND A COMMA. REPEAT THIS PROCESS UNTIL ALL THE
|
|
DATA IS ENTERED. OMITT THE FINAL COMMA.
|
|
THE COMPUTER WILL NEXT REQUEST THE LABELS FOR THE VERTICAL AND HORI-
|
|
ZONTAL AXIS. A CARRIAGE RETURN WILL LEAVE THESE BLANK.
|
|
|
|
THERE ARE NOW TWO OPTIONS AVAIABLE. YOU CAN HAVE THE COMPUTER
|
|
DRAW THE GRAPH. IF YOU CHOOSE THIS OPTION, YOU CAN CONTROL THE POWER OF
|
|
THE X-VARIABLE (IE.X^2, X^.5[SQUARE ROOT], X^-1, ETC.). THE SECOND
|
|
OPTION ALLOWS THE COMPUTER TO DETERMINE THE EQUATION OF THE LINE.
|
|
THIS ROUTINE IS LIMITED TO THE FOLLOWING 6 EQUATIONS. THE COMPUTER
|
|
WILL ACTUALLY FIND THE BEST FIT EQUATION WITHIN THESE LIMITS.
|
|
THE EQUATIONS ARE AS FOLLOWS:
|
|
|
|
Y=F(X) Y=F(1/X)
|
|
Y=F(X^2) Y=F(1/X^2)
|
|
Y=F(SQR X) Y=F(1/SQR X)
|
|
|
|
IN EVERY CASE THE COMPUTER WILL GIVE YOU THE RANGE OF THE X VALUES,
|
|
THE RANGE OF THE X VALUES TO THE APPROPRIATE POWER AND THE RANGE
|
|
OF THE Y VALUES.
|
|
|
|
IT IS NOW NECESSARY TO DETERMINE THE AXIS OF THE GRAPH. USING THE
|
|
RANGES GIVEN ABOVE YOU CAN CHOOSE THE HIGH AND LOW VALUES FOR BOTH
|
|
THE X AND Y AXIS AND THE SPACING ON THE Y AXIS. YOU SHOULD TRY TO
|
|
KEEP THE X AND Y MINIMUM VALUES ZERO WHENEVER POSSIBLE.
|
|
|
|
ALL NUMBERS ARE IN COMPUTERIZED, SCIENTIFIC NOTATION.
|
|
|
|
PLOTT IS DESIGNED TO CARRY YOU THROUGH A GRAPHING PROCESS IN THE SAME
|
|
SEQUENCE OF STEPS THAT YOU WOULD USE IF YOU WERE GRAPHING THE DATA BY
|
|
HAND.
|