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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;) u7 o) n! m, T+ q0 J. u. a W
theta=linspace(0,rad2deg(2*pi),181);
. q8 t/ u. c3 j( U% \% R; H% ey1=[0.512
, d1 l/ z2 w: F1 d9 @0 k3 T0.471+ L* F( [+ i* v% c6 c3 v
0.445. J2 Q2 E6 f5 p! }) @3 j
0.408
) \# x5 K3 ]; u! N/ A5 D3 |, L+ j0.382" w$ a) O, I5 p0 Q4 h
0.3479 S" ?' ?& a( q! U+ Z
0.33
6 A+ Z: U4 E5 y0.295
, [4 h' n* g; L* z0.275' I% {5 ~& A) e9 F& r% a1 k
0.2449" w- X0 v4 Z1 f% B3 d2 r
0.2222
& ^. S/ t9 K) C# q3 [0 T3 c- K0.1974
/ r9 S$ U, V) E0 r0.17923 J; D/ h' B$ A; s: `5 h; t7 O
0.1573# n! ?5 F: j% ]
0.1447( s* B$ o! s% z/ E1 }
0.1289, W: T6 ^/ X% k1 H* x! n: T
0.1155
: K3 u9 Y% x. W0.10726 z p; y* g. v7 `) ~
0.0991! H9 Q8 _) I$ ]
0.092
) ]# I' Z! P5 J8 D- B. M# X, S4 Z0.0877
) K- E9 ^) R8 Z' I" N5 M" |4 `+ }& ]7 _7 _0.0841# f- ~; \1 p9 h' A( J+ T- H& f
0.08422 R. p5 {8 G [( K% |
0.0856
e4 x! [9 v5 y% f D0.0869
3 w4 r$ T. F. L: M! c, p: ]; Z0.0929
0 [& ~4 A- r- V' _0.1027
/ k, A; Z. `* A) j% {7 U! h0.10643 V+ G& n# i2 t3 t' h- _
0.1165- ^2 Y2 |: \4 w
0.1295
; P1 ~1 a2 ~; H# X. Q" Z, ~0.1447
7 q3 A% t# h6 f% D3 ~8 ~0.1558
+ r; R5 I6 U: j- T0 f0.1696: M) G/ Q1 E% h& W. h3 y
0.19
# b! m! }, d0 C8 M; D* w7 h. S& M! U0.21. m7 A! [- K) E' d. s
0.2287
" K% H6 M9 z8 k0.2496
9 }2 r, V; |) ]7 s9 Q0.2719
- K4 A; z8 i1 t: M4 y4 K: a0.2986
' P7 y' K+ `3 |% W0.3246
$ a, }. [0 U: C0.343
( c. h; E6 ?- v4 D4 i% q' m3 L5 f, B0.372
I/ K% [$ n7 G# u0.393: A0 q/ U8 e, { N* {1 L% F2 b0 a
0.4155 M0 w2 R0 n: m x \
0.444
( J3 z8 f* c2 u, u0.47 p2 p+ A& Y/ P( Z9 A6 d
0.4948 o7 N) S1 A% u) n
0.513
/ \+ Z! g6 W% |& i8 u8 x! F0.542. z) p8 C+ p5 \' H0 e6 m
0.573) p8 Q2 e0 z4 H l6 r7 r
0.6
8 W$ V# t" Y8 F/ g* c4 d4 g0.613. {* P- S+ ?7 C6 g8 O
0.636
! A0 b# g8 G+ l2 E. A) l0.652% j4 s) Q/ g# x! U# Q' r9 f
0.675
( p- T* M7 T- V' D5 h0.6976 l- o+ d) E( Z6 F
0.71
: L7 U- c) x: H% {0.729: L2 d. \/ b$ R: c+ e. N3 I% U) L
0.7426 z+ o5 C6 l- ]8 U- x
0.76
8 _" x, \4 T' {, S0.767
4 l- ?4 h3 D' l3 i0.777* r! I8 r; \! }
0.785
) Z. A( b& X* E" ^9 W" t+ W: f0.793 v! s, h( O% n3 R( @8 k
0.792- a- P. U; O6 I1 P x5 T
0.799, X1 v. p* n: L/ p2 Y! s6 U7 ?/ T
0.808
+ z: z: W$ g( _0 Q6 `) k" c: Q0.795* |: l; b1 C' {' i. _
0.794
) y8 S) R& G- i5 U0.789
+ [: A: P7 x, K" z0.786
, j: [8 r2 t! s% y0.785
6 a4 a9 k B1 j. d& k2 \5 [* u0.782
' |1 B6 E/ H, E0.773
& O) t& H5 C% u1 H( r7 P8 r$ M0.766$ A' w' \+ j4 J$ C, s0 Z
0.746
& i0 N) M0 q) f, W4 Y: _* s0.726
- `* ~5 x7 ^7 K2 q" b& p7 d0.709" |; Z+ @" B# P: x) R; A
0.697( `2 g6 a# K+ o' {, w
0.678% h9 z6 H7 n( U; e+ S6 O) a
0.658
9 r: T# ?& X5 B& \2 ?6 P0.639. e/ t' ?, g+ M2 b* W' _
0.611
X$ R% H+ f" c0.597
! x3 L+ d* y# e0 |! @* ]5 I& y# X/ Y0.5684 H0 S7 {1 j) E- t0 o" D. X
0.553# P# \* S8 h; [2 K; y( T
0.522% ]* f% `9 S: B2 c0 j; \; _( j" M
0.501% t7 A4 z" m8 }5 \
0.477
1 }* `% a) T6 ^ f! T" E0.45
W, {$ {) y7 Y5 S+ o+ T; Y0.4215 p# V1 J& S, y3 U4 F, w! H- a/ M
0.396
% m7 i4 K* u V0.373: [4 x# Y( W A( i
0.342
: |; N3 e# y! D0.3196
" |* h# a% f2 [; D$ O4 t0.2984
3 _; {+ \/ R% T( t7 o0 t0.2686& F8 ~6 ~4 B* p, L
0.2559
: e) r) a3 y' S5 x7 q0.2146
! J9 k8 B# Q9 P' `0.206: s, X- y( d+ {8 ]
0.1936
: x4 L7 Z0 \/ ?+ [0.169
1 t7 m& u& y& J4 M S0.15163 l9 m" s6 |. d2 S
0.1428# K- b+ N( ~4 ?0 y
0.12348 A ^# ]5 F/ p7 c! ~0 c" f
0.11397 C. f+ n3 o/ V+ X- a* I4 {
0.1051$ k* m* w6 d; g8 q
0.0962 k% e: b; t; P) U* m" w
0.08953 b" n2 K$ S: q2 z
0.0837
$ O, g6 o/ m: Y0 D+ }0.08027 T8 h: m1 v( V& l
0.0782% u/ t. L0 t, F8 C
0.0814 ^& E' b) V3 N" u6 o: S5 _4 w* D0 C
0.0798
8 g4 w( e5 c/ f/ h( Z. z x' s0.0824
# p4 b! q- b1 n% [0.0870 @ @* U/ v. }, O8 L
0.09213 u. N- R# }, I% c
0.1017
& H& a7 _6 s9 m4 `- H3 u0.1089) d' @# W( n& |: m$ K
0.12056 P8 x3 t6 q, d
0.1345
" a# y! c& D( ?1 l+ r M0.1467
+ d7 g0 r# o7 { `0.163 J! Z( p4 x* p: r
0.1759, s4 V2 j; H, K
0.1947
8 x& ?' `# ]% q( R6 M; L. }4 p+ g0.2144
; a2 I5 C7 [* ^/ \/ `/ M* `0.2307$ V6 E! \- |! I+ P: j1 V0 |
0.2553
3 U! G- k( ~; V4 M0.241
4 D; I- U7 M( \0 o( s0 J# X0.3002
6 t8 U+ i& @3 m8 ]0.3268) K3 N. k! q2 y$ x8 h4 |! {. p# o
0.348
! B# U( c/ l8 `7 {+ Z0.369' Q5 j; J' H7 c _2 G( y8 j% g
0.399
, V! c5 ]0 S4 E; A8 ?3 ?1 L. v0.42
$ J" t; A! C% A0.44# _8 _) L, X# r) {0 U
0.466. K! ?9 _: }! r$ L- U
0.492
1 Z7 ?. c" N: A; M. }9 z0.51
. ?& b# U1 _" l7 w8 x0.535
( m0 R3 E4 r; M) g0.555
$ Z5 z' K+ g; Z& v% c; t2 e0.576; a/ ?- H1 ^5 p5 q+ H$ Z
0.592: S: H; ?. F& G T3 W; |
0.622
# G: x; s8 ?0 o9 m5 i" j; }0.638 l* g5 @ I4 H/ T8 ]5 X
0.648
( W* k# J H0 Q: o9 \8 v0.666
9 v3 ^& j. y: `$ T0.683: t3 Q, I7 |- u8 O6 |( Q/ x
0.703
/ _ i7 @8 s) }; ?" ?* P0.714* _ `8 B! E7 l) X& B, L
0.722) [1 H5 H' X* Z0 d0 c# K
0.749
: e: Z" _: m. D9 r3 Z0.752
C: ]$ T) B. m+ `0.752) L$ q! {! n3 @9 T8 A
0.7598 c2 W* Q) R4 Q3 v2 A% ~5 s% G
0.76& @0 o/ C7 Y0 Q
0.759
& J5 \* R: J$ C+ i3 l9 u0.754
1 C. D: `: q0 U* M0.7524 d% d4 n/ ?* H% @( m( j
0.7545 g0 e0 h; f6 N# [" L) f/ W) ]
0.751& L0 R( f1 B' z
0.746
- E# y8 L7 I+ ?) C7 J) Y) h9 A0.741) ?" Y- a( }$ |
0.728
' h4 i+ c S- z: N: g0.715
( y' X) c6 t7 y8 J0.7025 r9 |7 O4 p' T/ B0 R
0.6843 o0 B1 H& b+ ~) K, S. b) V' ^) P
0.677, p; b! t" o& i
0.662
. u# V- a2 G' V# x" E' \8 ?% p* y/ U0.635
/ q5 j& q+ j4 z7 V7 V0.620 m' R* G9 C2 G. u2 V
0.598
- D7 F' z- p! J# ?) I& ?' J0.586
6 ~% j( m" w, ?* p( S0.567 j4 {1 e6 k! O# u0 `
0.5375 O# a8 o% C, C2 \6 J
0.513
8 Y1 k; I8 {9 W0 [# q0.494& d$ G4 U' q. H9 f
0.462
, q+ _, v7 P D6 B: x( {0.443
" R) D N1 q4 _0.414
: c* y% P1 E' s0.385]';
; E* h4 @8 K3 f) O, F/ q# y+ b' \% [5000 0 25000 3*pi/55],. \% r4 W2 ^0 s% i# v
a=[0.4 0.1 0.4];
: f$ b& r; a8 s2 I- Zfunc_sin = @(a,theta) a(1)*(sin((theta)+a(2)))^2 + a(3);
5 x+ }+ Q [0 A# CA= lsqcurvefit( func_sin,a,theta,y1);
* w- y! @* u; V9 e* U5 i: h5 | L: Adisp(A)3 A% @+ {% w+ f7 Q
( S# O6 T9 m8 a/ i3 b# C7 a2 f3 K: J! S+ ?) _
错误类型：. G' ?! u( I7 e/ Z% d# X
}) d) P0 {, r
出错 Untitledexperiment (line 187)2 |# X3 w3 k P( h+ H
A= lsqcurvefit( func_sin,a,theta,y1);
; r5 B. C2 r; K c, G
! X. ?: J% z; ]. J6 X- X5 ]& B) b原因:7 Q* W! o* f" }& A: k3 L
Failure in initial user-supplied objective function evaluation. LSQCURVEFIT cannot continue. |
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发表于 2020-3-12 13:56
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