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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;
9 l3 Y a ?/ E6 P+ J7 L- B3 Otheta=linspace(0,rad2deg(2*pi),181);
! o, [! x z# _1 r; Cy1=[0.512
5 r N! a. Z4 ~ j0.471
' y! d! B- g" ?3 q' J3 h# h; w0.445
' j- K1 s9 i: c( i$ D' W6 V t0.408
* |3 y+ ^ @6 q0 F4 [. S$ X4 p0.382+ ^/ {9 @1 r' f: G: [
0.347
, H& V: J9 E9 [ a9 O. V% s5 h0.33
: X+ j2 l2 ?/ ^ x5 v1 T5 _0.2959 a: V5 Z9 |2 \, N
0.275# I. `. x- \/ O3 M
0.2449
/ E. L X3 c3 [) P; s0.2222
: W& K' b2 k+ x1 e3 r0 Z0.1974
0 G: a( f) O/ X# i& L0.1792
. T- m! L' g- x0 @0.1573. y' T* j( z8 E d8 l( T; m) @7 y
0.1447
. O% w; [0 e' U" h* P9 ?) i4 P0.1289
5 K5 h: u+ h- r0.1155
6 Q, s* M# Y- v/ n' S/ E0.1072
0 Y9 A# y# R( f! ~( A" y _4 q0.0991
( A" D& ~: y5 v* E+ R) V6 c0.092- M9 U, c% U' [& h! X* }( ?
0.08779 O; M2 [2 P! K* L R- I. j
0.0841* l- F' v4 q# U
0.0842
& e, {4 c. T! W' A: q/ Z0.0856
+ M. r5 Q) K. O. l4 j0.0869
$ V/ ?8 O7 ^) o |0.09291 J h; K( @2 w0 e; q8 a Q
0.1027
8 c' J6 f( y( M) A0.1064) R" [0 H4 S k" Z2 I: Y& ~
0.1165
: u B: M7 {. J5 y% `6 U0.12950 f! b" Z/ T a% a! m: h
0.1447
8 G! v; {1 G* z; ]0.1558
6 I! C" u3 ]+ S% T1 u0.1696
3 m5 P5 D* @ x& g* M0.19
$ t9 H# W# z3 o2 L& J6 O3 a0.21* n% m3 r% o& |1 U1 f, U" r6 v) L" R
0.2287
S3 v: @' {8 J" Q9 t5 q0.2496
1 |9 y' j D8 c6 D l0.2719( f+ b9 }' n* ]$ M/ G- J% @2 l' d
0.2986( B; j! O N8 R, R# t2 J
0.3246. @* z( z! k8 w% i
0.343: T& y. _, M1 O' t* i3 Z
0.372
# l9 G) p: N q3 w1 l0.393
$ W2 d% X' o& d( {0.415- j/ [+ l. e8 X1 {7 f# [6 @3 B
0.444. H+ q- @; o. N5 D
0.473 p) |8 ?& k3 e5 ?, q' J
0.494
0 l8 n: T4 p) K) X0.513
# A! b. \- J9 S2 m* ]9 M f0.542
g$ C( c8 @; n) r/ o$ U6 M. V0.573
s# v6 F2 ^# x0 G9 A6 r0.6- Q" L/ [! ~! J. @
0.613
- h, W$ C4 v5 D0.6365 l: T8 h# K% a. n% x( j {( i' k
0.6526 m$ H) z1 a# Y, }+ L5 a; o
0.675" X- J7 I' ^" S& }/ M& p
0.697
5 D- N# J0 ~6 o9 W9 S1 c/ J, K( _! w0.71& h, L$ G# |, `2 j7 x/ {
0.729 @! ~. H! q7 Q) r8 X
0.7426 N+ c* ~1 K- v8 f/ i, V1 x
0.76
- V. y& u1 z- R5 T4 R8 b6 b- s0.767
" q8 z9 j. @% e: y* j$ R" B0.777
# G/ l- W* W; J$ |2 Q+ {0.785' W( U. W1 R4 n; x) g! J
0.79
. i, w# p/ l6 \1 t6 h8 H4 K0.7925 ~1 R1 k8 c3 q
0.799
" l* s F: n! Q6 f) M0 O" Q0.8087 u1 q& G8 c% N
0.795
5 S, D/ r8 U" e( ?" A# U. F+ E0.794
/ ^; r0 d/ l# j7 F5 O' Q& Q0.789
+ `' n& D1 b1 L( r: c! b4 s0.786
* B" k2 T% d1 j1 `" b6 b2 f. w8 m& R0.785
3 [+ v6 @. [$ v o4 U( _0.782" `1 R/ h" ?% ?6 I; k" f
0.773. i3 M+ G1 r! C5 [
0.7667 X+ x* a" c. }5 D( K
0.746% O, C: w' i7 |" b: ^- {. V4 @8 T
0.726' m3 d1 Y: |, ?* ~4 j I
0.709$ F' n3 D( Y% e/ K. y' U0 s
0.697
' A2 z$ ~: _& @- g" N6 X0.678" |. D! A: c" O9 F! b! y
0.658
; m2 X! l7 P% [$ E7 `. W5 h0.639
& s3 s2 t3 q# @0.611& @! p; ^. b) a$ z& l
0.5972 e& I" F. i$ Z* ^' X
0.568
2 z5 x$ i: v* ^$ u$ e& S0 O0 h0.553
& o* L- P, k' L. z. Q9 ^, ]# g, ^! A0.522. ?; x2 y% D8 }7 X+ e) z, j% E* `
0.501
! z4 h w5 p F5 i4 C0.477
$ n# I( K+ l4 \$ Z7 e, Y& l0.45
" ~3 }; i+ e b1 S% f+ a0 ]/ x* A0.421" v2 s, z* d! X; u5 {& C- F
0.3968 G2 c: v/ A: q* ?" y
0.373
( l$ X. ~" q- f& Y' I! f- I0.342" t/ s. {# v K# X* e+ q a
0.3196( h' A" d `+ Q% d4 Y4 M5 ^4 P& e
0.2984
" |9 R6 M. C2 l3 R- y; B" ~( [0.2686
- w; W+ [* C4 } [/ o0.2559
! ?1 y$ k$ V3 K8 D$ O" x0.21460 L4 i4 W/ v* L* [7 H ]
0.206
. z4 g1 ?+ O: L& Q* \0.1936
, o4 H" s" P' V# g0.1694 \" ?7 ?* Q+ I
0.1516" Q5 r& X2 e* O& T$ J( X# ^
0.1428
; t1 s! Y2 k* c2 D4 v' }0 a# B L0.1234
5 h& m: ]6 K! d- l! G0.1139
, V( H- ]& Y: p3 B( [+ Y0 X0.1051
0 E& |7 |0 N |5 i( p/ y7 |0.0962* L( O6 |7 B* V
0.0895
- b, A: }. k# w5 z9 ~/ W& _0.0837
6 O1 u8 J6 u4 }4 x6 c) ^& L0.0802 H O; Y# l' a1 o$ r
0.0782
+ e; ?9 w# i6 U s; _' d& _- \0.081
5 O) k( O+ ?7 b% G C0.0798- O' ^( [) l& `- P9 U, I
0.0824
$ X- I0 D2 r4 R7 o' d* G" J0.087( u- T' w+ \0 q2 ~" v
0.0921
I L4 g+ y: i. v9 H$ \1 `0.1017" j! f+ x8 Q) y) r/ r
0.10896 b2 l b* o3 ]5 t( Z
0.1205
' e4 E. q- n8 u& _. F3 c: |! {' G+ z0.1345
6 D4 N" q" c! O* O0.1467- i5 j$ [( O& q8 z! k
0.16
6 R; a# \/ g! k" g3 Z0.1759
1 V" R, ]7 \6 ^$ L9 R: B0.19475 r' ]! h- }( d4 E3 A6 e
0.2144
9 I& x+ [9 @8 T' f+ B0.2307. U. |0 [! \# F9 \8 B, j% j! \/ k
0.2553
! _9 p# \* Y" S% z2 O7 C9 F0.241
& T6 S3 _# A, s7 P/ a0.3002
4 [. |8 c9 @* F0.3268
' z- T1 c* n9 g5 w! l0.3487 a, X8 O2 q' a" s/ c
0.369
! [' A* g2 @4 E9 z3 R7 x3 Y0.399+ D: d. R3 p/ s" k! A! N
0.42
' p$ A1 z5 H0 y, f# f8 p7 n8 a0.44# i' |$ ^3 c# g6 n W3 F, V# v
0.466
- q( d6 ^; o! }3 k* c7 w$ S0.492! }) K1 E- D- F4 e* N* x
0.51
9 j. D& v: ]' ~+ S |- m: r+ b. B0.5359 E4 G. X8 E: T) {6 _& O
0.555
8 O) x; K# \9 \% e# S0.576! ^4 D s' N$ ]' y5 `& I
0.592/ C7 u! \3 @) D' @
0.622- e$ r% |% h3 d% W9 @+ e7 W1 v, u1 M
0.638* ?+ x3 p5 _9 y% Z4 [9 y
0.648* r; u0 B6 `: x" p
0.666
) y5 z/ Q) J. _- o2 G: ~0.683, m# U6 a5 U# }# t1 f T+ o# ^
0.703. B% @6 b: I* k7 s! \! \; M/ c; x' H
0.714) T& ^5 T& S$ x2 q1 l6 B
0.722
0 Z5 u6 T, j; {' T0 Q% V0.749
: Y, _9 k% i1 b0.752
8 K! @7 x- p; T+ i0.752
: |, O1 `; u5 N6 R0.759
! [- ]) l. P/ t1 A; x: s4 Z; v0.76
$ k4 }# b' d5 ^/ f1 C0.759
' l+ R; u Q5 X0 ]$ N) s/ l0.754
1 l8 x9 @- g3 @3 c; M( G0.7521 e9 S9 e) {3 [* D% i
0.754# A, L6 b D4 z
0.751
) K" ~1 L# @ o4 {& \" k; M! w0.746
) s! ^! p1 d8 I0.7414 Q2 V. a7 \! v2 m8 i: e# u9 h
0.728
5 I7 p" I3 \. {, |* D0.7151 u3 t3 |# |0 x$ a
0.702
8 ] t$ b- K7 D5 z/ t0.684
3 i$ ~; {9 D$ \# X; P! s0.677( _/ J j* ^3 d: [, I6 ~
0.662
8 g2 M" M" k4 w Q$ ~* @0.635
" t/ |7 V; s& y' z! @4 F0.62; f2 Z% q! i! x! J6 A6 Y
0.598
: d! y4 W' _+ i+ e, g0.586
& c, l2 |- d# M* [0.563 r5 |6 Q; C J0 ^, D
0.537, T7 e& M( T, y7 f4 h# [; \
0.513! }5 \7 ?: D i+ b7 q
0.4943 x _/ J" a5 }" E* T& R
0.462
6 M! C% e" E; `2 `6 q4 X; |0.443( s5 [ u3 F6 H+ l- v% a, C
0.414
7 u; [% @2 n4 U4 m4 E0.385]';9 o8 J+ z' T" }/ ~8 B( C' h/ e
% [5000 0 25000 3*pi/55],
H; s# ~2 y: ~3 w8 ia=[0.4 0.1 0.4];
- _. X9 _( Z w' r$ _func_sin = @(a,theta) a(1)*(sin((theta)+a(2)))^2 + a(3);
1 u* ]. T& R/ m. M w. t4 PA= lsqcurvefit( func_sin,a,theta,y1);) A% |7 T/ W: A, A6 D
disp(A)
- i! Q K. u0 _2 R( n* w
) r& P: a8 e3 N+ b! i$ S4 W, L! e/ Y2 Y' |3 M; M5 O
错误类型：
' T i; q5 K6 `* Y, U" y* O0 b* k4 J% g, H! T' T, d
出错 Untitledexperiment (line 187)7 X: j2 n: y$ B6 y$ J* N p7 S! S$ ~
A= lsqcurvefit( func_sin,a,theta,y1);
9 D( F- N, o0 c" {' J. O `7 a
9 n( _: [; Y$ {. F. ~( P% M原因:
- J4 ]$ x& _7 Q; j+ e" E! O/ C 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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