Sharp PC-1500 - Page 53

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SHARP
PROGRAM
T I
TLE
LO GISTIC C UR VE
PROGRAM NO .
PS- B -4
CE- ISO ,CE- 151
1
( Outline I
and C TR ceq u ired
Usi ng a logistic curve, the input data are approximated to find the estimated
value of y for the new va lue of x.
k
General form of Logjstic curve: y = - - ----
1 + me · • .ir
(Operating Gu ide I
l ou J 0 · Us ed f or coefficient calculation when k is known.
I DEF I 0
Note
(E xample I
I. k is known:
k = 195
'
2
6
Input; ! n: No. of da ta
k:
X
1
- Xn
Y
1
-Yn
Out pu t: j Coefficient a
Coefficient m
Used for coef ficient calculation when k is unknown.
In put: j n: No. of data
Y
1
-Yn
Output: l Coe fficient a
Coefficient m
Coefficient k
The effecti
ve number of da ta is up to the multiple of 3.
Gr aph, data and plot outputs of estim ate value.
Input:
Es ti mate value (X) . The n umber of estimate value inputs
is up
to the number of data designated by the l•.,I 0 and
l• •• I III
Printouts of the estim ate value , X and Y.
. Data input in the l ou l II) and l ou t III is also possible
from the casse tte tape recorder.
The keyed-in data can be ou tput to the cassette tape.
y'
Estimate value
11
.r = 5
54
x = 12
10 150
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