|
|
EDA365欢迎您登录！
您需要 登录 才可以下载或查看，没有帐号？注册
x
想用三角函数拟合一组数据 结果一直报错 感谢大神解答 程序就是源程序clear;
% S. ]7 y; _- \) vtheta=linspace(0,rad2deg(2*pi),181);
, B1 r7 ]5 j& z. d( ^y1=[0.512) X' f- S/ `* R; S6 L- E1 ^- {/ a
0.471
- z4 W7 p1 U4 q. W, Q( z1 D0.445
3 u" q: m% x; u! R/ l: V- `0.408
6 @9 B& d8 H; Z$ |0.382
" b6 M# z/ E) g$ ?0.347
) q- D$ b6 t4 \# k0.33/ _7 s4 t1 _9 ?4 P) \9 J
0.2957 q! A! p% W" S# ]4 @* e+ l
0.275
* p2 r$ G+ }) Z' v( T' [0.2449
8 o0 C# d9 ~4 A$ t0.2222
7 T7 |2 K, e+ f/ T/ F1 W0.19745 q% E* J6 I, V2 F) c5 g
0.1792
, s3 S% }, \- y; ?5 c5 B; b0.1573
- B( p. e, a: y: h' [0.1447' l' x4 C8 d5 l* s; Q p8 a
0.1289 K' U( H, @3 q" a: t
0.1155
, t: W3 s. s; H! F- Z; p- E0.1072( T" d1 J6 q% }% c2 T8 D' M5 ^
0.0991
: s S9 c0 W2 w% Q' i' |1 |/ M0.092
' }! X7 E' k! M9 J3 j0.0877
2 p8 `) S. O. `0 a/ s% z0.0841
: p( G9 ~+ W9 I3 w1 ]0.0842
6 r) k$ P8 T, T/ O* I0.0856
9 c1 ^8 d c0 `0.08698 N; N7 P g" `- D
0.0929
/ v: @# S: ~6 {1 r7 c4 y' V0.1027
f# e$ F- ^0 N$ h' Y0.10646 \/ m) J$ u" U5 F
0.1165
: C; F% y* E, n( P& u' b! p0.12956 O! [3 L D" k# u0 J" a$ |6 h
0.14474 c, T1 G: j4 z. H. ^0 h7 _! Q6 C
0.1558
' V: b! h" R7 b/ b. {0.1696
" r' ]3 @8 ]7 T$ w0.19
, u7 o& r" a/ F7 K( ^1 d- M) B0.21+ k. x/ ^. }7 ^/ L$ @$ H
0.22879 N8 Q5 c3 a; K; ?/ ^( A" H2 Q( ^
0.2496
. E' h0 D) }& W0.2719$ t) Q7 G. Z( H3 X# r- p( Y
0.2986
8 v; W& S2 @$ _9 l4 c2 Q8 x0.3246# {+ I- ]( F: ~1 i
0.3435 J1 r; s. d- V% [
0.372 A7 \ v( f/ [# n' ^3 |
0.393
; @' d+ @1 o' y/ w5 J/ `/ [3 G0.415
6 L- _- A P l" @1 n7 _0.444
7 `9 S4 ~0 o2 x& [0.47" Q) w* A( H$ ]) m V% r( T) i, ^
0.494# o$ [3 ?2 \' r7 f# ^6 d
0.5137 a- O$ |# m5 t. R! y4 C0 Y
0.5421 }! F6 A. Z4 [( C
0.573
: B5 f7 I4 X0 L. h7 b9 Y* N! `0.6
5 r! ?* v" F* a2 o0.613
: u6 R5 d; h) [' q2 o9 C5 `: i0.636
; v, S* x5 g, ^# s; h0.652: Y7 Y% H& J( a
0.675
4 x; V, F, ?" @9 c2 E" X0.697
0 t' }0 h( ?* `. i/ c" G: v) b' X* f& i0.71/ q. n9 }4 T5 u, e1 E- [
0.729
9 _' S$ o N, ?4 I( [; F/ L/ A" n0.742
4 n$ r l% Q. w! {0.76
; i+ v8 d% n2 ~( Q5 v4 Q7 {' [0.767" K0 Y2 p% t" D7 n1 Z; X R
0.777
1 f% X' C8 B0 y" l& |0.7859 n w6 P6 T2 k6 _
0.79 R" ?: W% I7 T$ J, @2 J
0.792& U" U1 ?3 ^- \' w& p5 J
0.7999 R5 I: d+ S) v8 O+ [) E0 W, _% x
0.808# i# E x. d5 ~1 F
0.795
" ^/ b, \0 V, ~3 m7 o0 n: H0.794
* S5 E: W7 q6 A( |- A0.789& U; X, V/ Z; t* K6 U+ w
0.786
# {9 @1 i" A% F$ Z$ a% n0.785! p8 k* F! G5 a
0.782
4 T7 h8 J4 I+ C: s4 m% j0.773: J' F _9 P7 m3 o7 i
0.766
. c- ?6 H$ P9 ?- Z5 M0.746
; }/ y, z3 c1 `+ p3 x& H0.726
9 E. i+ M [. f0.709
! @8 N( \; l5 a0.6977 {, S+ N( x6 d+ q# \: ]
0.678
7 G2 S! J, n/ k- t4 Y4 p0.658" o+ L. n' J* e' D+ a8 Y8 R
0.639
S/ R& @, R. \7 k- ]" ?0.611
: s0 w8 q. H( I- n0 Z, |0.597
6 c. S6 c `: I2 e, s0 U0.568
/ H4 d" E8 v* q6 G+ g& T* N0.553
- ~8 p5 V2 }# B' ?; L# H: }: [3 [0.522
1 s9 ]. ?( {3 o0.5013 H7 @3 t- R; u9 Y8 \. I
0.477/ F' `8 M$ q) ]+ r+ N" j
0.45- G5 l- }5 j- {; y9 ^/ O7 C' J" x
0.421
& a8 a& p2 m# @* x- N0.396
4 _. g$ F' a( h/ i% x0.373
9 p1 D) {, }8 {0 [" x0.342
% u4 u' d' \9 c! G* Y3 a0.3196
G, w1 o- H8 r* a. y0.2984
: _( K {3 H& X- r+ _/ b5 I0.2686
" \4 D1 Z. B. g! p2 }8 e0.2559, H; W! {/ N& c4 t) c5 n8 F
0.2146* _# P: p2 W0 L* T
0.206* }: C/ Q6 \% g- M
0.1936
9 P/ E3 ]! v8 O+ P# s4 v0.169
! R$ }7 [# b- D! L' H# p R0.1516- D& U. a: x, D1 F: C
0.1428
+ w9 q' W5 z- T+ o0.1234# l! }1 z/ h! |- Z
0.1139; Q6 r# j5 Y/ r# n* B. e
0.1051
( G7 M( I, \3 d; [- m( q6 O* D+ P+ a0.0962+ H) {& u$ [. E6 ^7 }6 [
0.0895
; j) [" @7 }1 D2 L' u; z6 h1 T0.0837
0 q3 M* E- b" Y0 J- G% ~, I. y0.0802
/ g" |; J+ v7 G! }' S8 q0.0782
( F8 c; @' @& M' S# z5 A) Z0.081/ X9 S ]/ E5 p* [. {
0.07982 U- Y7 L7 l/ u% R9 e8 S
0.0824
3 ^7 o$ p. o" z3 \5 |% ?7 i7 j X0.0878 e( g' l, J1 {/ l. G
0.0921* B6 `- D4 W( F. r7 E
0.1017
& d. }/ r1 k8 ~; N0.1089
' A# a+ r# `, L& g& D# N v; O0.1205( k& R0 ?. `: R1 g- L: h( p' W
0.13451 x/ l' C6 k1 |( m6 X9 H3 v" ^
0.1467
) S6 B5 z$ {- h F0.16
" z* N# ]3 @. S9 ^- v, e0.17596 y7 `- ~$ b6 ?) p$ U) `! l5 t
0.1947( b% b# m( R+ M1 h5 Z4 r
0.2144
3 y) A' j! U/ s. l! t0.2307
! w! F) Y$ v. `+ |0.25539 h! t% y6 j! t- e2 w5 M( Z: T7 g
0.241
: ] t: }( ]; V' ^' [9 z0.3002. E. x6 }4 G2 ]* v" k* c1 k# `+ I' Y
0.32684 ?1 l w" Y) S
0.348" k3 `+ N) y6 V h: l' \: L6 i
0.369" H1 N4 y1 a% k/ ~
0.399
& k3 v6 F; l: m6 X' `' P( k7 F$ V0.426 z5 e7 i! z4 T; k; G- C, K
0.44( x- I) P$ w; ? L W8 K0 D
0.466
0 F0 ?7 Y0 X2 M1 I3 }1 X0 }0.492
; T" q3 z9 _( k6 o! r0.51, W( b) J( b Z: |# j" Y0 x" s
0.535
+ G; c: `& u% S/ ?* g0.555
+ F, G& s2 B* R0 f8 J2 k0.576
. N3 Z/ L& q& y; ?0.592: S# b& s: z: S/ U; Q E; `
0.622 }* M' W9 t$ v( O+ {
0.638
8 v+ S& O' O/ N$ |+ ?0.6489 i; k9 m4 A0 Y$ A5 F' \" v2 J
0.666. q, S5 t8 a( L
0.683
. l1 w* @. Y$ K4 W3 h7 d0.703
) x8 d8 \5 a% M7 r9 S3 Y5 s0.714
4 }" l* J& P) z5 ]6 s/ z' Y4 U0.7224 f* i0 O# s1 C, T! @5 v: g
0.7492 I+ S* x2 W+ o( {# D
0.752
- q# [4 q; }9 U7 @0.752
7 I1 _0 t4 n% D0.7599 E. A* ~/ \0 u; Y9 Q' J
0.760 f: o. W1 b( d4 O+ R6 `1 b
0.759
, |1 n+ w& _3 S7 H! w7 Z7 l) I. i0.754
) k8 c, C0 |' h9 ~' Y* b( u( L0.7521 d: T! Z( Z0 ~# z
0.754
/ E+ y- w* u: }" X. v0.751
$ ^8 G1 i1 b2 |( m$ z. ~0.7468 |/ `# Z8 M; X! J% `* u
0.741
( R0 j* a0 O& G" Y; L4 m f J( h, r0.728/ Q( b8 c2 L$ y! }; F/ y8 d4 M; @# ]
0.715
& n4 ?; C2 v7 L1 [0.702/ l% ?. [6 I0 P; b. ]2 V2 ^
0.6840 J3 G6 h: K/ J5 x# ~- m
0.677
1 o6 m, k' h0 N0 K3 Q0.662' L2 l4 M- r; r7 N# _
0.635. A) q0 p7 d9 |6 b8 m( ~4 J1 r
0.62
1 H3 V/ A8 u0 X( j0 I0.598
' {2 `4 l) G: \- T, U0.586: j# i# {/ r3 h' g
0.564 l' e2 J2 t& p% l% H. y( }( d
0.537
2 p+ r, D' R2 h! t _) w" L0.513. V, e, n \$ V
0.494
' m9 C$ s8 Q) c0.462
. t7 `% I2 v4 d! C: g0.443) V. v% r- ]3 A, h; ~; c6 S, w
0.414
* D9 m$ k- a9 P/ {1 v0.385]';5 x5 t# e) j: [/ Z& c
% [5000 0 25000 3*pi/55],9 y' j9 r, [9 t. }6 I- T& Z' v
a=[0.4 0.1 0.4];3 H8 W1 u: u/ B
func_sin = @(a,theta) a(1)*(sin((theta)+a(2)))^2 + a(3);
, P- B# a. a" s7 s eA= lsqcurvefit( func_sin,a,theta,y1);' f; A+ ^" d+ S6 m" s
disp(A)# A2 J0 s; U. E3 j: E
7 l+ t* E3 C* c% X: _/ ^
% }; k3 a+ e/ l+ T/ [9 g错误类型：
( a! ^) z+ c) S- U
- x6 D0 a: |. { h; u, z# x出错 Untitledexperiment (line 187)
/ F" ~% U/ o9 I: Q9 @A= lsqcurvefit( func_sin,a,theta,y1);7 J/ \ h% x" H/ i0 x% R/ t0 b
" t5 N- e3 n+ b* Z& l( q
原因:" a$ p5 a N* z3 g' o- k
Failure in initial user-supplied objective function evaluation. LSQCURVEFIT cannot continue. |
|
/1 
发表于 2020-3-12 13:56
收藏
淘帖
支持！
反对！