HP 15c - Manual (Page 78)

78 Section 3: Calculating in Complex Mode
78
Keystrokes Display
O+V 027-44,40,25
Increments counter k in Index
register.
l4 028- 45 4 Recalls h.
lV 029- 45 25 Recalls counter k.
* 030- 20 Calculates kh.
l2 031- 45 2 Recalls x
0
.
+ 032- 40 Calculates x
k
= x
0
+ kh.
O6 033- 44 6 Stores x
k
in R
6
.
l3 034- 45 3 Recalls y
k – 1
from R
3
.
v 035- 36 Duplicates y
k – 1
for second
estimate.
´_3 036-42,10, 3 Searches for y
k
.
t4 037- 22 4 Branches for valid y
k
root.
1 038- 1 Starts decreasing step size.
O-V 039-44,30,25 Decrements counter k.
4 040- 4
O÷4 041-44,10, 4 Reduces h by factor of 4.
O*V 042-44,20,25 Multiplies counter by 4.
t2 043- 22 2 Loops back to find y
k
again.
´b4 044-42,21, 4 Continues finding y
k
.
l6 045- 45 6
´© 046- 42 31 Displays x
k
.
´UOA 047u 44 11 Sets a
k + 1, 1
= x
k
.
´U
) 048- 33
´© 049- 42 31 Displays y
k
.
O3 050- 44 3 Stores y
k
in R
3
.
´UOA
´U 051u 44 11 Sets a
k + 1, 2
= y
k
.
t2 052- 22 2 Branch for k + 1 < n (A isn’t
full).
t0 053- 22 0 Branch for k + 1 = n (A is full).
´b3 054-42,21, 3 Function subrouting for _.
l6 055- 45 6 Recalls x
k
.
® 056- 34 Restores current estimate for y
k
.
´V 057- 42 25 Creates estimate z
k
= x
k
+ iy
k
.
GB 058- 32 12 Calculates Im(P(z
k
)) (or
Re(P(z
k
)) for equipotential
lines).