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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;
) l! | j' [) |% t; Stheta=linspace(0,rad2deg(2*pi),181);2 w2 _9 d' q: S7 D5 b
y1=[0.512
: h5 o6 m- Q2 C1 M" B3 E5 G* l# f0.471. W0 ?% e2 y9 ^& J! |! F U- {2 x
0.445
' w) A }* y" q0 V8 s0 U, R4 c0.408" [- h: o( Q% A
0.382
+ V P$ B2 O9 A# K0 w( ]$ j0.347
F. E1 k+ N) D' Y0.336 A8 ?" o, U( @
0.295+ q. d7 i; x! F5 c& @1 F
0.275
" p3 u! e$ \1 p, `; P" i0.2449
/ z$ q# ]4 F7 X, E0.2222
' V# y6 Q! v, \% C2 ]1 g7 l7 N0.1974
' I4 W5 O$ `0 y6 V+ a$ E3 e1 q4 _0.1792
8 J8 C7 Y+ I- o) v% M4 B0 \' g0.15730 L0 t8 j, X) E
0.1447
$ u0 x: {0 A5 [6 ?/ [3 B: p0.1289
4 i% L+ b' v5 c0 c* g5 t# M% N6 W0.11552 k0 q" Z+ y6 D1 o7 o/ e
0.1072
/ a* N& u3 V, V9 H8 j. p0.0991# A2 w6 \/ t: F8 u! ^
0.092# ?+ Q( [& l2 w0 f8 s
0.0877
6 }0 t& V; R6 t4 ?0.0841
- Z3 _/ v% x0 d( I* G0.0842
. [5 s" F, Y5 V/ V0.0856 H$ n: c; W& v% {2 b1 O+ x3 {
0.0869( S, ~. ^: Y- }2 H
0.0929
# _2 _3 |8 F3 c& C0.1027; f0 c2 z% U' O3 a: a
0.1064 i5 V, Q1 f9 N3 H j( O
0.1165
" n( E, u8 D0 D- ~, U& o7 g0.1295
. R9 d! u. V/ q' v" b F5 k0.1447
( b0 U) y+ ^. K9 f" [, \& e0.15580 h# h* i6 s1 Q. }- }, B
0.1696( c9 t5 Y9 Z- x+ Q; Y' _: n0 s
0.19
! t! h) \8 e9 j5 {" T f0.21
) T/ c& F% s4 z0 E: n9 X0.2287$ }5 O! Q6 [1 V: f8 r8 F( w8 n" Y
0.2496
: d$ E H& ^+ y l3 z+ u0.2719! `! L" B1 d/ A9 g2 Q5 l3 T: u# N" G
0.29862 X/ k4 ^: ^3 u" n
0.3246, [) ~4 r1 s" A. g. I( e1 \& E& s
0.3439 F+ T( ^! ]# P. h5 L
0.372
. R# p* `, m( q) H; H! k0.393
( p/ t5 {: s5 G) \: W2 l) ~0.415
$ p* y! @$ _. z0.444
. K( C3 x6 o$ L# G1 k3 |$ {: P0.47
U9 \9 S: n+ J, {. I0.494/ o: I9 e2 Q2 J* i/ d9 F6 V6 Q4 V
0.513
1 `0 a0 D: \4 ~3 n2 P8 @8 ?! X0.542
, @, U# M0 z$ S( k4 } ~0.5734 F- \, ?& |. W3 A3 N* y: V
0.6 R1 U6 `4 m: f- ?0 v
0.613$ C0 I% c, n1 G" F9 }( m2 j
0.636- q+ f; R' `/ s8 S8 b: ^& L
0.6526 U( c' g/ s% p; K/ j6 ~
0.675
) p E$ w$ Q& y2 J" v0.697
6 E7 q* J; J# W/ R& _- W: I' t0.71
9 ^8 @9 r7 `( z5 J4 t' G0.7295 |: R4 ?. f% b; C3 j+ ^
0.7426 c( m9 D. a+ e. I$ ]' ` }
0.76 U) w( O3 v6 D8 y6 a& E3 ^
0.767
6 E. I/ e3 @/ p# a2 j$ y* I0.777
1 ? O$ g/ M$ a# O9 f% \# _0.785
; g' J8 _$ {3 G6 r0.79
1 `" @6 U& l) g0.7928 Z2 z' h. P0 C+ i9 p! @
0.7997 j% R' Q9 w3 z, d+ f1 W
0.808
: z r4 v" g( U C/ S$ [- V4 @0.795) Z7 Y+ U( D( {
0.794
1 }+ B$ |9 f6 r4 G& H- V L; @0.789- r' l4 B$ c( V _( x
0.7867 F4 ?$ h( ]. l" @- c. H! w
0.785
9 `' r* I. E% X" K) \0.7825 h1 {( @- e+ [6 C: y+ ]7 p) f
0.773. B. v0 C- A/ Q+ D
0.7662 P5 x: q( c0 M+ s. e
0.746
. H. [* x" `/ x: ^2 D' o* ~* u% {0.726
: _2 ?5 }8 y- t. K0.7091 F1 m% T6 ] I# m
0.697
4 m% B% X2 [0 Z( F8 X$ i: V1 G0.678
- K9 p5 f( E5 T% ]4 \0.6582 p \7 P$ l- L M( C
0.639! N9 p7 k' \" D8 G! T1 T
0.611
; a) l2 B0 p# G, ]0.597/ Y F' t2 n% L9 Z6 q
0.568
9 u* o" I& i8 I3 N0.553/ z# s" i9 U+ v* \
0.522% l1 n- e7 M, Z5 A. ?+ I$ E
0.501
: C2 f# \& [' x: m7 w1 L. }; o0.477
1 R/ U- b9 y) d, |& M; }0.45
0 t7 `) i4 r+ p) j0.421
' s! `8 f3 V6 u1 P8 E. X' p0.3961 ~" [+ m" z. r& R% x1 ` _7 a m
0.373
0 a9 V2 `5 @# Z; |* j1 \0 o0.342
" N: l* F# L1 T8 m$ v9 c" ]1 b6 E! \0.3196( P; @, P6 T* s6 o+ ~
0.29840 ~! t# z1 ^) ~
0.2686, Y% S; F) ?; H! s D% [
0.25595 R! o, E0 I4 w% z* t
0.2146
4 M0 K; b$ h* \& U0.206 d+ R* N% d4 ~) ~. v
0.1936
+ U7 ]5 Z% `) q/ V. v0.169
7 H* M, B; F6 J0.1516" L& M/ y/ E! I+ L0 l6 n
0.14284 z8 J" ^% ]" Q% `6 X( A
0.1234
9 c! t2 v7 S+ X- i# \0.1139
+ U7 D: F6 T3 E. f1 h0.1051
" h* d5 w% q2 i+ ^0.0962
I3 h$ W& j$ r# c% F. A" s0.0895
: l% }9 T4 ~0 i* }3 i( f0.0837
* [, n. ^# w( f% D0.0802
5 Y! `* ]; ^, M, f+ o: h0.0782
6 r; j H, w9 b2 e9 k& m0.081! p+ X' |* m2 J O4 k6 t f
0.07989 ~% [: m ~4 _8 p. I! h# M
0.0824) M$ j+ W7 [8 a
0.087
4 R4 H5 u* f4 [9 i0 B0.0921
j& q" G- ^+ i l# L8 A0.1017: w' ^" z" f, G9 R5 e
0.1089/ k9 }9 T4 I2 Y
0.1205
8 r$ ^- C$ x' a" f0.13454 n1 ~% Y* g8 q
0.1467
2 [# j- S! W' }$ {& A0.16
) z" j; p5 O" I @% A0.1759
% S, k6 B4 s) m8 A0.1947* o e1 q) q" p( U) o; _
0.2144) M% [3 e+ H: E
0.2307
. ` n j. x2 i0.25530 X' N2 I4 g( c. n! E# M7 U' J
0.241
1 z+ B8 X* Z7 C" Y& \ N4 x0.3002
6 V- Q7 P' a( Y) g0.3268/ w% k, J4 X2 B5 _/ N# N4 @. r9 d" ]1 W0 C
0.348
9 n5 M' H3 h1 r0.369! o# F M. Z6 |4 ]" R: H
0.399
: c6 M* w5 {2 @" b6 P3 v0.42
& j- M+ o& X, X4 N5 J, d9 j0.44$ s" o" E: K6 X8 f$ H
0.4662 ?# ?( m q4 u% J4 N
0.492* c! @ G( i% E' ~, a' D( D
0.51
' B% I+ v3 E4 @9 A! D9 Z: [0.535$ X, i; i3 x7 t5 R7 u/ a7 k1 P
0.5551 c% x+ G" Y/ `0 h+ ]
0.576# H9 l9 ~, P" c) T. W
0.5920 _5 J* _% @* B% W7 x; d
0.6222 G5 T5 A" D* \$ g; `
0.638% I6 C& S! y/ H7 E( R! I
0.648
- L1 V( v7 `$ J8 }, t N0.666* V* p- h1 k/ [# X, q
0.683, @ K7 I2 g; f9 |6 A' _9 B9 s2 s
0.703- P- n; h. U& m
0.714
0 C. u+ ~: P# W* T# `8 l" T0.722. o1 P( _- h. {% K% l
0.749+ t n9 V2 ]" ~1 \
0.752" n* R- R) h' C; t# o) l
0.752# \, @0 i& c( p8 X- C0 N
0.759
$ @5 @# W, ?" l, ^- ?7 S0.76
% a" K$ Y7 S3 y h( c+ Z0.759
) S3 Y8 j/ Z0 |0.754
- K& u9 ?" I5 t% [. d0.752
& U- O& S* R k, O0 ?% c0.754
2 k, t) H n3 Q; ]. B7 U0.751
& q2 ]* K' e% F# P) u' a0.746' S" [5 r/ `5 a* v; T1 P; l
0.741
2 S% K0 ~7 r3 |- ?. X0.728
& ^: L5 k( f! b+ B( O% v0.715
$ w$ F' n9 U. |) }- l! _8 N7 s0.702
& ]7 `7 N2 q2 V$ r) m4 \, W0.684+ u5 A, ~ @0 [3 V
0.677
' |) I' _) r( g9 _0.6628 E9 z9 @# S: d r, r8 Q1 S0 B
0.635. a( h# {7 J# w1 K& y
0.623 S/ B' `- A4 p6 n3 X% s, x$ ?4 M
0.598
* N1 i, J7 _" C3 t: z* G6 o0.5867 ?" S, f$ d7 s5 V0 m1 K4 N
0.56, H! n2 ~, E5 _# x$ F/ y5 F5 Z) A5 P
0.537
. D: n- j' y. A7 C$ a1 Q) {3 T' h0.5138 U$ M& V* W: u0 s: ^- B9 j* k" |- `# K
0.494
% w+ e3 |6 ~' R6 u: A$ u0.462& _! ]4 k ]" R+ k
0.443
/ I' _1 V( J4 i0.4148 Y2 Z+ t% s8 {
0.385]';
' R/ l# ^# \8 M" c% [5000 0 25000 3*pi/55],- [% }9 u U+ C" \6 x4 M
a=[0.4 0.1 0.4];
% N% W- L" ~( C( L1 Xfunc_sin = @(a,theta) a(1)*(sin((theta)+a(2)))^2 + a(3);( R& F2 u- B, W! l
A= lsqcurvefit( func_sin,a,theta,y1);' `0 x. u* g# @
disp(A)' `; j, S. r' P- l6 p
5 n7 z2 `$ e% Y- x" p! v! J- }7 c, J
$ m4 g. Z7 n; {- `错误类型：/ ^0 ^ c( s: O" }& D w' n5 D
7 B1 ~3 S* j$ S) I' ?$ L2 R
出错 Untitledexperiment (line 187)
2 V! t+ h0 i# c' EA= lsqcurvefit( func_sin,a,theta,y1);
& v8 y' b' [. c# _* l. Q
! g) g; E) t b6 f6 ^. `% C原因:
8 q6 L0 C. n, ]# _. n 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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