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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;
( _, B8 n1 \! V: h1 ^* M: dtheta=linspace(0,rad2deg(2*pi),181);7 ]/ \. O& D' E& [8 i5 [& s
y1=[0.5127 @9 ~* ^8 i6 y' \+ J, ?( H
0.471: d, F- \' f' U% e. v2 x9 M
0.445. H5 a% u2 z0 F: I( L* j
0.408' G) ~% a! _! S' X( q( l0 e
0.382
0 ^, B9 b" l5 z( b0.347' }; C6 l' {" f+ Y% b% R, x8 u9 x
0.33) x* J# n% i* t) u0 g
0.295
6 D/ D. _8 L/ a' g# @( W0.275
! q) n( X# ?( ?7 L, ~8 q* i' [0.2449
# q e, ?0 @2 I6 k' x0.2222+ F" [, y" y% k
0.19740 C/ ]% f8 i+ {+ P" T! [+ k
0.1792- I( k# _6 Y2 h* g
0.1573
, d1 m) Q. F: x9 t" `0.14470 \: {% \" n9 ?8 l' U0 E% f! S/ g
0.1289
& Z3 D" x2 P3 c" o: s- x( b" k0.1155
* u' U, c% M5 f1 t1 B; h% @0.1072' e* j+ P' c f7 n5 n; N! {8 J
0.09916 T# \! B& I# S% s
0.092
0 c+ z$ B) N0 Y: A+ i0 b5 r0.0877
# `1 _) `+ i4 J3 | {0.08416 w- [5 s1 b( F7 G9 D
0.08426 X- k4 d; H' J! F: |/ Y) n8 ~
0.0856
" w; V5 P. O0 [! q8 ~) `- a0.0869
4 J) c' Z2 I5 g0.0929, e" C: a: B) B& ]5 P$ i" A
0.1027$ f) |& ]# L1 F6 ?
0.1064! q$ \. ^8 z3 o0 F; U; x5 y4 N8 D
0.1165/ k0 \3 {: ?3 _2 o3 m2 V
0.1295* f6 U- d& w! R3 o1 u: L
0.1447
' [; q. @, x6 Q0 Q: G$ I$ X) S( D* l0.1558
' Z/ C9 u* P" K0.1696
1 Z% l. {7 |% c1 C F/ |+ @0.19 I }' ?5 B# P6 U2 G) I1 L
0.21
- D/ H* ~5 `! S2 ^" G ^0 R0.2287
, H3 Y. s* t! ]& z- g0.2496
q8 i$ y3 R0 L8 g9 v+ K; s* @0.2719; k* @& l ?0 [' E
0.2986% G2 h7 [* Y/ w, H. w n2 g: O5 ^
0.3246
/ H) ^. F2 a* G0.343
( h# O) x: @# a+ m, q+ p4 A0.372
; m' |. u3 g3 X2 ?2 n0.393, B% Q/ R9 m2 M; g
0.415. h) V2 y- Y* G" F; |
0.4440 D+ Q7 M; z$ r8 q
0.47
6 \! S4 @. i; E5 d0.494
! q+ \9 i" ]2 h: V0.513( e6 g1 o! ^6 r4 ~
0.542' L5 n8 Z& S2 h9 Z g2 K# C, d1 P3 A
0.573) F+ t$ J( n7 A0 `8 Q8 B3 F4 \* x
0.6# G$ f5 K0 s- ~+ i H2 I9 E
0.613
$ ? m* \9 f7 Y, x0.636: V8 Q. S, s' W9 D @+ O! |
0.6521 J% g! P* X4 w8 o" v, J5 t) n$ Q) x
0.6756 i8 h$ ?' g+ t; e1 L' [+ C+ o; ?! }. g
0.697
& r2 u3 q% Q3 w- E0 O- R0.719 O/ y9 o- Q2 S' r: Y
0.729
# H) D5 L+ S* q8 J# y- ?- l0.742, q2 E1 b9 W8 Y
0.76" U$ F# w$ b" ~+ i
0.767
4 r3 E3 h; B: b; S z0.777) W3 k$ T; G# [% b
0.785* D# \/ p) Z# Y- X
0.79" C( @" m! M; ~# W& I$ Z/ ]' r
0.792
5 @0 u/ d3 @+ }( ?2 D0.799
3 e) ]! e8 }( k* H: e9 ]% A0.808
! _9 H3 \/ C7 p4 x* D6 m, H8 t3 `& ^ h" P0.795
0 v0 T$ g# d# b5 x6 S0.794, Q; Y: A$ a/ R* _
0.789: A+ |% }* [; Q' |2 I
0.7862 O- Z3 }9 Q2 X- z+ v4 E' K2 ?7 u, N
0.785
5 h- ?7 l8 o2 b! ~% x1 W& s7 n: v0.782
$ }$ ^$ R! x0 ~0.773
5 ?6 z: ^& g2 D5 n1 `: F0.766+ d9 z% L+ q9 c7 c
0.746' k1 Z. G" v" v3 l: w, i% c1 A
0.726" x9 B0 G$ a2 ]" ]# }1 K
0.709: G/ g4 h, x5 T8 C" z) ?9 x5 ?
0.697
; J: B, K, W, v+ M0 L6 A- b/ u1 c' ~0.6781 y5 e8 i! ]% Z, W6 A8 W& }- r' s
0.658
! h, H5 h& Q# U3 M3 K+ Q0.639: g5 x+ m, }. ]# J& c. K" \( C
0.611
* L8 t! E; ?( S; F8 E6 c0.597" ?, J* r. l' E# y! U
0.568
; L3 W6 e9 X0 g- E0.553
% e4 K: A& l8 ]9 A7 ~- E' ~0.5221 w" W% b8 A+ ?" B# h
0.501; u/ D& ]1 A6 N5 x+ [
0.477: R7 a3 S' i6 V/ f* ]2 S' j
0.45
5 B, J; Y6 |- j+ B. |7 c4 d8 J0.421
* k; ^' t& d; Z/ b& J; R/ a0.396$ E+ e, Y H. i0 ?+ w1 {
0.373
( q. S4 F R' r2 A- q+ W1 ?. b0.342
4 ^0 c0 c; b+ \1 ]) I Q" Y: G8 E0.3196
+ W! W4 n3 `8 G5 X( G1 q- }0.2984! S b8 G8 d% F3 P" i
0.2686& K5 e7 }" Q( V* w, }
0.2559 m f8 {3 o! P/ g4 A
0.2146
$ v$ f8 D0 a2 O [& `" F0 Q) d0.2067 h- V5 Q9 w* t3 Y$ S: W% Q
0.1936
$ x2 P$ t$ ~0 u: y/ N: c0.169
7 e; A" H1 ~/ O" Z, }0.1516
. g/ V! _- u* e% f! ]* k& g& f( m0.1428
9 @2 {2 x; K; t4 O0.12347 {7 Y+ e5 @4 e
0.11399 S' e2 A" V4 C @- e# a% s& w
0.1051! ^0 p/ s4 f, T/ ?" q" ]8 R' w
0.0962" C: z4 Y/ B* P0 ?3 I
0.08956 _/ b; q8 H2 Q/ r
0.0837
: a& ^5 f7 n) ^/ g$ p2 ]+ V2 K0.0802& n1 z1 A+ E; j$ x7 J! |- a
0.0782
' A- w V: T& W( A( S ^/ J0.0816 F! q4 V8 ^8 z4 Z. m7 n( g+ ]7 }6 A0 e
0.0798* n: P+ G. [ D$ q, i
0.0824( F' s, Z+ X' R6 L9 v1 U
0.087
* v5 a! r" A9 U0.0921
! ?% P( O' A1 m" s0.1017
/ y, l3 q+ ^) N# S! {% p0.10893 \, V; n/ H7 s, C' q
0.1205
( n! H C- ~- B8 p+ x" | y0.1345- A! `- M5 N5 ~! u4 P- {
0.14670 \: {& m( }5 C. H
0.16
7 [; x1 Q2 |% l, j0.17598 p% [/ y8 [1 c3 m! K
0.1947- ^: Q- f: [8 h, o5 ~- b! a) r
0.2144
# G0 g0 w7 R) P: }) r4 f0.2307! H$ c( L5 j) e8 p4 u. Y
0.2553
/ U- x/ J( p+ x0.241' r' Q2 C( ]3 ]& D: w }% g
0.30027 S# ]9 a2 b$ Y+ u; ^) v6 R* o3 v- @) t
0.32687 }6 n$ S& k1 Q. |
0.348
9 J" e# A5 W- I# H2 ^6 I# M0.369
1 e6 \& W% V7 I8 B4 K: w: J O0.3990 n1 t8 w$ ]$ S- ?0 L; h/ v
0.42: \( V/ c& y' _
0.44# \5 u5 } z( w
0.466& d0 \; i" t8 C
0.492) T: `- S7 ^$ G& u4 H
0.51
2 P3 _3 o% G1 T7 b/ e# N& P3 l0.535
+ F% \& M* U% C( c4 G5 L0.555
( q" w1 E; m- O, M2 `0.5768 }1 `, }) O P3 l) S5 S7 I2 O
0.592
$ J! K- q- R* [& _( ]1 X0.622
# j$ y# Q5 v& P' h5 L0.638* q: n# \4 s, Y& Q/ e3 r
0.648
n, T0 ]2 I6 T( W* `/ t0.666. u" d! m- X P8 n" A0 T- {1 m, a# N, S
0.683
' W4 F. a# R' _! e+ V" t2 [0.703
3 j. a8 N4 }9 L- a N( v0.714# D7 X6 V6 K4 r! [
0.722
! v% s3 c: A: @4 A8 f# ~* {+ p; e0.749! d/ f$ O0 X! K8 {+ f
0.752
3 u& c `* a q3 E) L2 B Y+ ?0.752
5 n+ v z" i% Z0.759
' f: L! N1 g+ z. t0.76
) o: U6 K6 \; Y7 Y+ _; ?0.759 c# G8 v- a* s1 F
0.754
5 y: F& p1 E8 X/ D( W# e0.752* S* c( G3 g, w* d
0.7547 b9 [- f5 a! b8 \& N) y
0.751+ t( [7 h. o6 @, v6 `3 O
0.746
# J0 t% \" [* G5 e+ }0 W0.741* h7 m/ }( c/ u& \
0.728
7 }/ T' ~) Y5 o/ [9 G0.7156 d2 |$ ]0 f5 @) ?2 P2 \* w+ T
0.7026 _5 L; g3 T/ X1 v; \4 Z% `
0.6847 H! J2 N- ?/ u* @/ Y) Z; S& V# Y; Q
0.6775 b4 `6 u9 s0 u5 b% Y0 x- w
0.662
1 [( s# a# R! W5 W, Q q0.635
- l5 z8 Z$ i- }+ Y4 U4 ?0.62' w8 z9 r+ s, \/ X0 M+ q3 o( z
0.598
" Y* ]! i' C! W6 f8 b: X2 k0.586
0 n v- S$ N1 g6 b$ ?+ I. S0.56, f" m2 C/ K) ]) {' P# C( j
0.537# Z1 I8 }: p/ y9 Q% e
0.513
: I1 ~5 l. y. j M& G5 {0.494
4 U! q9 e1 f6 P- ^. B I. C0.4627 L( b: i* _, N$ E2 B% A; ^* [
0.443% F, A6 @9 Z, r. @; X1 W
0.414" E- U+ T4 S) y( P. x, V
0.385]';1 y4 C: A; X* ^9 r2 r
% [5000 0 25000 3*pi/55],' V. x( Y5 e4 V& y6 \" M* H5 ^* B
a=[0.4 0.1 0.4];5 y4 X" i4 ?8 `' m
func_sin = @(a,theta) a(1)*(sin((theta)+a(2)))^2 + a(3);
/ f9 O4 M; E k' FA= lsqcurvefit( func_sin,a,theta,y1);. Y' v" C4 M) I, ^0 T% p9 J* X( Z* S
disp(A)- v; R7 O3 f& W/ \4 U& k
( w/ P1 h3 ?# u' M1 b
8 |" Q% Z4 c" @7 C p错误类型：
' O6 F' i8 t" u7 l5 m, `- f( F' @2 V+ `
出错 Untitledexperiment (line 187)7 O3 P+ C; s( L$ z E" |
A= lsqcurvefit( func_sin,a,theta,y1);6 A( k! n3 \ i7 N& W; d
2 I4 g/ K8 O B' U$ E) e; s5 m, i
原因:: Y6 [' ^/ v% w I( I" [4 Q8 Q/ U
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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