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三段式函数的拟合,一直提醒函数格式有误,但是苦于没有正确的示例,不知道正确的格式。
0 |0 ^3 @8 J3 ~( R% F左边是想要拟合的公式,右边是代码,请指正,万分感激!
3 X# \$ s8 e# R4 x* ITitle "Type your title here";
o. Q \! v9 o$ }Parameters a,b,c,d ;! L, w1 o4 u% B$ K7 ^' ^
Variable x,y ;1 I5 p5 x4 E) Q0 f" l: ~' _( M/ f
Function
% d0 ~& J' _2 _/ _$ uif x<a,y=b*(x/a) else if a<=x<=c,y=b else if x>c,y=b*(c/x)^d;
9 S$ v3 c, ^$ [' f; a' U- G; v. zdata;& Y8 T1 P) H- ?. [& a
0.1 12.2622. W. w! u. y _
0.2 126.989
+ j! G+ }% }' H. x1 x" ]0.3 168.8319 Y, j/ V- S6 b) Q* i) i- W
0.4 504.78
4 k& O: z& _& ]* K0.5 1660.53: N* q; B5 X: b" b1 w
0.6 3194.8
' J4 J, T* Y* L% i& X, R! R0.7 5118.09
! d- `2 z" _2 M. S6 e9 k0.8 5593.49
: v ~* z( M z4 A0.9 6354.52
& ? C' v2 F) `7 E3 ?' e1 6951.39& j) D$ b7 i6 h* H1 C
1.1 6057.45% a3 @# O( O) M; Q$ V, a
1.2 5126.59! b" P, d, l. j+ c% j% X
1.3 5155.45
+ m* i. w% {$ @- e0 [: d: n. ]1.4 5167.41/ v, f) b% J% w: T
1.5 6408.55+ T3 C, G) G, J
1.6 6983.15
2 R( x* n3 a( Y" X. J1.7 10444.6
3 E- J L/ p1 t6 @& ]$ [( K1.8 9819.3
, _ T+ M, {% q& A$ C! v1.9 8233.5
% [+ N5 r1 z6 [! K# Z3 M: K2 8548.7
2 H3 M) ]3 s. d& b) o3 i$ e4 }2.1 9723.07
1 B" l6 k& w( C, g" T {& l2.2 6976.66* L- c: W7 L3 m8 h& M
2.3 8150.64; |8 _; v7 I, `8 j
2.4 8704.88# d; G- @. }4 o( U7 M5 F: ]
2.5 10920.11 h: e+ c8 T" a) j4 F0 U
2.6 11601.9
0 r" X# V% P+ _5 E( t g2.7 9217.567 i' `' P# Q6 y f$ V7 a2 J9 `
2.8 10517.2
9 U' O/ B r/ b p# M7 x2.9 13225.9
, }% h: l# k1 Y9 n3 10667.9* W5 f( q5 b( x9 i- B$ p( L
3.1 7870.21
; s" a* ^; G. O G0 n3 d" [- C3.2 6025.277 ?7 b. j4 F( Z: z) l
3.3 5713.581 R3 U) Y. J7 [* W |* w
3.4 5444.974 t, L+ K& W# L' ~
3.5 7526.28 {" R: O* F8 n ?+ I- `; I9 ], @: R/ ^
3.6 11122.6. |4 ]$ E4 a- ^! i7 Q4 I
3.7 10034.69 b% Q1 E$ ~6 V6 L) \! P$ J( Q
3.8 8191.89, s6 ~* G: M: T. w$ w+ Y
3.9 7777.02
$ b% Y/ V8 g7 s; I3 D8 k4 9546.24/ q {6 _: N e0 S5 y2 R R9 v9 H$ U
4.1 11494.7
6 c e& L0 R4 x/ R4.2 11492.1
# R- F$ p1 Y0 o4.3 10388.34 S3 s- Y( A9 E6 |
4.4 9548.41' o4 G7 `6 \6 C0 _
4.5 12450.70 k/ ]* [( B8 m5 ?& ^
4.6 18987.2
; B9 w8 v/ `9 [' b$ S; N/ Y1 E! O4.7 28381.8
; q* j2 D3 a: ~- } Y4.8 36321.2, K6 M! r' _( @4 G+ F* s$ z
4.9 39182.1" m6 j3 }( q4 s/ U6 p5 Z8 [2 k
5 39738
/ z2 H) r6 ^/ Y3 X! w5.1 38192.9 F. h! w( }4 B
5.2 35211.8
# q/ S2 z4 M; Z9 u: K5.3 31235.4
. w# [( W9 M( n( l: Y5.4 27255.3
) S, l+ R; W# _2 I4 T% M3 D5.5 23579.2: P% l5 }* B1 B& q6 D$ p
5.6 20797.7
' b o" M. G/ f+ B+ k% O5.7 19082.9
) V, D, D8 B: \+ K0 i1 V* q/ i6 w5.8 17750.6- V# q. g5 i5 F
5.9 17354.2
/ V, g/ e$ H' o( W% u6 18027.8+ K, ~8 ?6 f4 L
6.1 20452.5/ {7 q7 X I' o- @
6.2 22496.6
, a) @; h# w/ {# c6.3 25224.6
# |2 ?! l5 K: Y% Y6.4 27468.68 o) F S" s1 T2 r; P3 ~9 a& U1 @2 U1 }
6.5 29534.9
+ {& T* A+ Q% L( ?1 f# v6.6 29086.3: ^# g: r2 P& ~7 y$ p; b
6.7 26879.51 F( h8 } f- H* F5 }' |; j, J4 y
6.8 23869.6
3 I2 H! X4 a% t$ a( ^6.9 21170.5) ^+ f' c$ y- h" V5 d
7 18538.5
& w! t9 h6 K( a! P: @2 u2 Q7.1 15742.2" ?8 O! v% j& x( c# I0 l/ G/ j
7.2 13204.24 x3 Q, v9 m; e& _
7.3 12671.2
& Y7 j8 N# \& Y7.4 11967
! |' z5 ^8 e& v( K7.5 11079.9
! x( R5 R9 T) Q7.6 10199.8# p) r6 a' K( w2 k4 u) K. H' u
7.7 9508.26
* S @ N. b* ^* [! H: a5 M7.8 8949.19
% y/ s! C x" [) v1 e8 [% |" D7.9 8586.8
% b0 i: @( i9 \8 G8 8718.86! n! K+ T- f& ~- F( h7 d
8.1 8936.01
) ~) l6 ` I. Y! N: r- l8.2 9141.139 ]- ?1 p$ n' `6 p) t4 _; p# ]
8.3 9499.2
' m$ G+ ]2 v# _8 [$ ]7 |( s8.4 9767.392 d6 }7 _# O1 @6 _
8.5 9876.61
; l, V& p) y: u) u2 k' c: k& L8.6 9566.14
- O, t' Y, ^$ Y% n! H8.7 8802.236 X3 ~8 T( L! _; p A
8.8 7706.28
, W2 ] o( \3 _ i# }) [& n8.9 6755.66# g! H6 j+ A3 q8 E! c- }& n3 l9 j
9 6311.97# \) b. q1 T7 o0 _6 D0 m
9.1 5814.99
; p9 ` ^, l* w' s9.2 5271.1
% X& U1 L+ ]0 n' m W* p* Q1 l9.3 4729.66' i9 F6 R& K( ~$ S: f! G- ~
9.4 4278.744 r; ^6 Q) |. O* i) v0 }/ s$ ~
9.5 3900.71
3 Y; p; @; d7 e: A9.6 3607.55# m% J4 z1 `8 C) Y
9.7 3393.22
u6 s! o6 `% B B: ^: Y" I9.8 3242.63
0 R7 k; d0 S& m3 g+ g2 k9.9 3136.26
% i6 E" l, r! @+ Q1 m10 3050.8( K1 t* s1 ?; T8 i3 H7 G
10.1 2970.71- p# y% V- Z( q/ s
10.2 2942.11
9 }+ i6 d# ~6 b" B8 g3 I10.3 2898.5( G8 N; Z2 x' M, h% i' t8 g- j
10.4 2829.74) Z# ]" H0 @( W2 `6 G) u2 `! l% v
10.5 2732
; q ~- z" M9 R! G10.6 2673.95" j" ^9 b; S0 f
10.7 2618.58+ [# W/ q- `, m$ T# e1 ?
10.8 2538.54% j; V1 V/ K$ U% `
10.9 2439.27, P! s3 I, V* z' C+ ?
11 2327
$ i2 G/ T, c" t$ |; J- U" y- o* A11.1 2207.77
2 W! Y) O$ S! T- U11.2 2099.27
t4 d3 c& P9 Y/ x8 `: i2 T) H11.3 2005.83
( G* b6 t, h* H% `- O: K2 L7 K11.4 1939.58
7 l2 \ [1 I& }% T6 w11.5 1868.75
7 B; A# B2 \5 g) l$ v% t11.6 1792.37+ q% T$ @' v1 j* G; A( y% j+ J
11.7 1716.14& M* r4 Y! L- y. I7 ]
11.8 1647.1
' `" H9 v. w$ i! k3 @9 E+ w* k11.9 1592.69- j1 Q# d3 `% r& A8 V o5 W+ O) R+ X/ _
12 1535.02
* n4 K+ E+ g! ?, ?12.1 1487.1
1 ^" x. R2 w0 t0 T12.2 1442.02
* S C6 e- F j2 H) g4 i0 [12.3 1404.55) N- q* ?5 k* r% s: `8 s, j
12.4 1372.14% J0 s3 |8 ~$ Q* z4 Q- w4 ~
12.5 1339.26; k% P* u! y" T" q
12.6 1306.91
, ]9 e8 F% T; Z4 \, ?) K' Z12.7 1274.2
9 ~6 K5 A6 e. K5 k; y$ |12.8 1240.19
" N' h& U" ]$ v9 t4 c12.9 1205.69
; z* S7 r/ q; g9 Z3 D2 t13 1174.97
9 u8 v2 x! L4 @+ [13.1 1143.40 \8 _8 ?( ]9 d6 M a( N! m/ J' V
13.2 1111.18. f% r3 s/ G$ t9 s
13.3 1091.32
# K6 K D/ p9 T% _13.4 1073.65, g6 p9 _1 l0 E4 M
13.5 1063.19/ X3 m8 m. j+ D0 h5 m! y
13.6 1059.75 ] }+ W& G! X, n# ]2 t4 A& U
13.7 1059.07
4 o6 |! {4 w/ F& L13.8 1067.5
! M8 {6 I; _9 s, q% T13.9 1079.592 y1 ~7 _$ ~ ^% F f
14 1092.71/ _' ]+ ?$ j6 ^3 b9 a
14.1 1107.18
1 b% C- {% ~+ k+ e5 T+ b* @14.2 1122.075 X! r, ?" X8 A3 ?9 Q2 a
14.3 1136.8
. _! c: N2 W- y" F% T14.4 1151.09
3 |* m: N' j. [& S% _- J14.5 1164.63) y& X) q2 K9 Y% k
14.6 1177.12 @; k2 n, j7 l U' |% g+ Z& k5 g
14.7 1188.84
% a9 F- B; }0 |# T) W14.8 1199.04 s' B u6 s* {. B( y3 J
14.9 1207.72
: Q# ?8 k3 \2 g/ E9 c15 1214.969 t5 u4 b7 T' J5 v( G# g3 C
15.1 1220.1: x! @1 d4 V2 K. z7 I& R) H
15.2 1223.03
9 _; e. J+ j- l- u15.3 1223.685 T: @ _3 C* N$ L
15.4 1221.98
& L% Q# c$ \, Z- _1 ^- n1 {15.5 1218.290 U! s! x- Y) j9 f6 M x. {4 B
15.6 1213.321 w) Z2 z6 a l
15.7 1205.84
; E1 |8 K0 H, B15.8 1196.24! p; k6 ^, _9 s: z
15.9 1184.64
A2 b" {5 S/ E& r7 D16 1170.7# w n5 z- s' }5 ]7 a9 J
16.1 1154.55* C; c, w6 X6 U# v3 f' I+ e
16.2 1136.4
]7 ]' R6 J! ^( g16.3 1116.58
' L( h- S9 G: z! X16.4 1095.05: e6 e. F# x* t3 o
16.5 1072.02
# G# U. w% y6 a16.6 1047.73% G5 }5 _3 k3 x, G, Y
16.7 1022.4
G% n- K3 D0 A8 x4 G5 @16.8 996.2948 X7 K0 f \) v5 a
16.9 969.694% n! f. P$ P, ^1 h, F
17 944.492
6 c: w4 Y. S a" O17.1 919.623- N$ Q7 n/ M/ x: K
17.2 921.07
9 t; _" J/ h! q) y0 q17.3 921.2848 a& f, z! F) D. |, R/ p8 Y7 }1 y5 F
17.4 920.186
6 n$ L1 ?: C- F$ s) y17.5 917.7192 u( N& N* r5 b8 p
17.6 913.863% P4 p H7 z0 k8 a' q
17.7 908.738
+ q: D- a4 B* w- a17.8 902.358
' c7 y0 S& J7 J3 n7 ~17.9 894.874
3 f6 z7 F! I' e5 h; c" ?" W) t18 886.424
1 t' o# {6 ]9 W& Q7 r9 R18.1 876.931
8 L; ~0 G8 D( s5 N' V) ^18.2 866.692
% i6 l- {/ Z% o9 E# F18.3 855.953
3 L; k0 e7 X, w. o18.4 844.501
% F, ]5 h. W) E, _18.5 833.049
! A, `, Q; J" ^. A3 [4 V+ F& K18.6 821.271. a0 u# w2 [( }' @0 f) N. a$ a
18.7 808.993! ^7 l7 J. r! t
18.8 796.3153 `- v, U# r3 P( Q/ C" s. l
18.9 783.336: x" Z4 n u- i+ p; t8 Q8 [
19 770.44. g: I4 N1 ~/ j" N
19.1 757.745
" \, I2 H' `* D9 h! Y+ Q+ A4 r& G19.2 745.0814 l E' X7 F0 Y+ B- Y
19.3 732.521
2 h! H, l, p: h, f) ?8 E19.4 720.132$ v' x- k5 D) b; z& B. v0 O
19.5 707.972* y- _. W+ L5 ^! R3 l
19.6 696.0959 N1 c# |% I5 ]
19.7 684.546. E' m- e6 x+ g3 Q5 n
19.8 673.363
" B' S9 ]3 ?& e) D19.9 662.575% c3 |' C1 O9 u
20 652.206# W6 S0 ?2 B# `# ~# g+ W9 W; X
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