matlab的数值分析方法 [复制链接]

打包到一起就更好了,让大家花这么多TB,不好吧,

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打不开？？？？

大哥你放在一起多好啊，这样简直要人命啊

系诶下诶歇息诶的

谢谢MATLAB 指令窗中的help指令和lookfor指令 ti9}*8  
作者：精通MATLAB(5.3版)  来源：转载http://www.51base.com/machine/softedu/cam/matlab/5120060126150.shtml  发布时间：2008-4-16 9:29:54
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减小字体 增大字体 %?=)!;[  
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2.9.2 指令窗中的 help 指令 +)gB9DoK  
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2.9.2.1 直接使用 help 获得指令的使用说明 v8'5pLt"  
%wL,v.}  
【例 2.9.2 .1-1 】假如准确知道所要求助的主题词，或指令名称，那末使用 help 是获得在线帮助的最简单有效的途径。本例演示：关于矩阵对数函数 logm 使用说明的在线求助。 :-Wv>V\t  
c#pj:f*H  
help logm TB#Nk5  
LOGM Matrix logarithm. 3dm'xetM  
L = LOGM(A) is the matrix logarithm of A, the inverse of EXPM(A). Complex results are produced if A has negative eigenvalues. A warning message is printed if the computed expm(L) is not close to A. KY+]RxX  
mHs:t{q  
[L,esterr] = logm(A) does not print any warning message, but returns an estimate of the relative residual,norm(expm(L)-A)/norm(A). j-32S!  
hk;bk?:m  
If A is real symmetric or complex Hermitian, then so is LOGM(A). ym%o}(v-  
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Some matrices, like A = [0 1; 0 0], do not have any logarithms, real or complex, and LOGM cannot be expected to produce one. 5\S&)ZA@  
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See also EXPM, SQRTM, FUNM. ~6d5zI4\  
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2.9.2.2 使用 help 指令进行分类搜索 !<r8~A3!(  
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【例 2.9.2 .2-1 】运行不带任何限定的 help ，可以得到分类名称明细表。 ,sI35I J  
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help sN]Z #7  
HELP topics: 61:9(*4~!F  
matlab\general - General purpose commands. hdj%|~Fj  
matlab\ops - Operators and special characters. ,` o+ ?  
matlab\lang - Programming language constructs. sX'nn  
matlab\elmat - Elementary matrices and matrix manipulation. g1V)$s7  
matlab\elfun - Elementary math functions. sHsg_6~  
matlab\specfun - Specialized math functions. xb`CdtG2.  
......            ...... j38 6gL  
For more help on directory/topic, type "help topic".
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2.9.2.3 采用 help topic 指令形式获得具体子类的指令明细 xJc.pvVPw  
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【例 2.9.2 .3-1 】如果用户想知道有关矩阵操作指令一栏表，那末就运行以下指令。 @p]UvqtB@  
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help elmat }]GbUC!Zb  
Elementary matrices and matrix manipulation. Efr3x{ j  
Elementary matrices. B5`;MQJ  
zeros - Zeros array. Hirr=a3  
ones - Ones array. 3:AU:  
...... ...... |j# ^@R  
**HrWM%?8o  
Basic array information. ~`[8"YUL  
size - Size of matrix. !gJzg*{u@  
length - Length of vector. BS.=  
...... ...... H:MUNc8i  
+{*)}[w{x  
Matrix manipulation. I>hmbBlDv  
reshape - Change size. /.@x 4cdS  
diag - Diagonal matrices and diagonals of matrix. zq=&4afOE  
...... ...... UN(3i(d  
5M.Red.L  
Special variables and constants. ay-
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ans - Most recent answer. xT=ySa$|>  
eps - Floating point relative accuracy. vv* |F  
...... ...... |*1xrM:v~  
)f[C[Rd  
Specialized matrices. D-D#`  
compan - Companion matrix. K1-+A2snhV  
gallery - Higham test matrices. W
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...... ...... z}3di5+P  
wt\m+!u`  
〖说明〗省略号由笔者所加，用来表示被删除的内容。这样做是出于节省篇幅的考虑。 NfqJ=9  
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2.9.3 指令窗中的 lookfor 指令 MYu`c[$jZ  
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【例 2.9.3 -1 】查找包含积分这个关键词的所有指令。 4znH$M>bU  
)*W=GY*  
lookfor integral AHWh}~Yi  
ELLIPKE Complete elliptic integral. T
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EXPINT Exponential integral function. Lz?*B$h  
DBLQUAD Numerically evaluate double integral. HoL~j({  
INNERLP Used with DBLQUAD to evaluate inner loop of integral. <OIUyZS  
QUAD Numerically evaluate integral, low order method. BPh".RJ  
QUAD8 Numerically evaluate integral, higher order method. qL,ka  
COSINT Cosine integral function. ETxp#PZ  
SININT Sine integral function. `ReGnT[  
ASSEMA Assembles area integral contributions in a PDE problem. 3jXR"@Z-  
COSINT Cosine integral function. Xout:dn  
FOURIER Fourier integral transform. v`
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IFOURIER Inverse Fourier integral transform. S7Znz@  
SININT Sine integral function.

MATLAB 指令窗中的help指令和lookfor指令 u$apH{  
作者：精通MATLAB(5.3版)  来源：转载http://www.51base.com/machine/softedu/cam/matlab/5120060126150.shtml  发布时间：2008-4-16 9:29:54 3(MoXA*  
减小字体 增大字体 "&@gX_%  
^g}L`9fL  
2.9.2 指令窗中的 help 指令 pi|\0lH6W  
 o1 jk=  
2.9.2.1 直接使用 help 获得指令的使用说明 K/!/M%GB6  
dv}8YH["  
【例 2.9.2 .1-1 】假如准确知道所要求助的主题词，或指令名称，那末使用 help 是获得在线帮助的最简单有效的途径。本例演示：关于矩阵对数函数 logm 使用说明的在线求助。 5BrU'NF  
\)FeuLGL9  
help logm tX@0:RX%  
LOGM Matrix logarithm. ${wU+E*  
L = LOGM(A) is the matrix logarithm of A, the inverse of EXPM(A). Complex results are produced if A has negative eigenvalues. A warning message is printed if the computed expm(L) is not close to A. dz{#"No0  
@m5O{[euj<  
[L,esterr] = logm(A) does not print any warning message, but returns an estimate of the relative residual,norm(expm(L)-A)/norm(A). {k kAqJ  
>?^~s(t  
If A is real symmetric or complex Hermitian, then so is LOGM(A). Cw6>^  
/TzNdIv  
Some matrices, like A = [0 1; 0 0], do not have any logarithms, real or complex, and LOGM cannot be expected to produce one. p^T&jE8])#  
s.|!Ti!]  
See also EXPM, SQRTM, FUNM. 3X,]=f@_  
TFAYVK~  
2.9.2.2 使用 help 指令进行分类搜索 5T~3$kuO  
7h(HG?2Y  
【例 2.9.2 .2-1 】运行不带任何限定的 help ，可以得到分类名称明细表。 or?0PEx\  
_Ngx
$  
help xeJ9H~^  
HELP topics: pGO|~:E/L  
matlab\general - General purpose commands. `Af{H/qiI  
matlab\ops - Operators and special characters. :&xz5c`"04  
matlab\lang - Programming language constructs. xR\D(FLVS  
matlab\elmat - Elementary matrices and matrix manipulation. (J6"
;  
matlab\elfun - Elementary math functions. u)<Ysx8G  
matlab\specfun - Specialized math functions. C4&U:y<ju  
......            ...... H+S~ bzz  
For more help on directory/topic, type "help topic". <f7?PAd  
Ah6wU|_-g  
2.9.2.3 采用 help topic 指令形式获得具体子类的指令明细 Xg|8".B)A  
&{X{36  
【例 2.9.2 .3-1 】如果用户想知道有关矩阵操作指令一栏表，那末就运行以下指令。 aQ.Iq  
!F=|*j  
help elmat  f$:7A0  
Elementary matrices and matrix manipulation. G3Idxs  
Elementary matrices. 2#>$%[  
zeros - Zeros array. J xA^DH  
ones - Ones array. y0/WA4,  
...... ...... s`$NW^']
 
ZA*b9W  
Basic array information. k98< s  
size - Size of matrix. 1Z^`l6|2  
length - Length of vector. O"_e
rH\nk  
...... ...... N&6_8=3z  
Y|{r vBKjf  
Matrix manipulation. 4+ASwN9  
reshape - Change size. :z0s*,QH  
diag - Diagonal matrices and diagonals of matrix. ig2{lEkF  
...... ...... Z!C`f/h9  
:FX'[7;p  
Special variables and constants. l 'AK  
ans - Most recent answer. ?noETHz)  
eps - Floating point relative accuracy. h(C#\{V  
...... ...... M/::`yJQu  
7
\7Brw4  
Specialized matrices.  ltCwns  
compan - Companion matrix. g@S@d&
9  
gallery - Higham test matrices. 7Y-FUZ.`>  
...... ...... /0B07B  
R&u)=~O\5  
〖说明〗省略号由笔者所加，用来表示被删除的内容。这样做是出于节省篇幅的考虑。 %v?jG(o  
J~_L4*Jw  
QLn5#x~xb  
2.9.3 指令窗中的 lookfor 指令 9%p7B~}E  
9IS1.3  
【例 2.9.3 -1 】查找包含积分这个关键词的所有指令。 b>hBct}  
Yv#J`b@y  
lookfor integral jRv;D#Hp  
ELLIPKE Complete elliptic integral. #}[Sj-Vp  
EXPINT Exponential integral function. x
'E'jh%  
DBLQUAD Numerically evaluate double integral. aJuj7y-  
INNERLP Used with DBLQUAD to evaluate inner loop of integral. `l[6rf_.  
QUAD Numerically evaluate integral, low order method. ?V&Ld$db  
QUAD8 Numerically evaluate integral, higher order method. WrE-Zti  
COSINT Cosine integral function. h/0<:eZ*  
SININT Sine integral function. Mr5('9%  
ASSEMA Assembles area integral contributions in a PDE problem. jQ.>2-;H9  
COSINT Cosine integral function. "K}W^J9v  
FOURIER Fourier integral transform. ,(@Y%UW:  
IFOURIER Inverse Fourier integral transform. [M7iJcwt  
SININT Sine integral function.

这真是个好东东啊！！顶

真是好东西啊 5H'b4Cyi`  
下了啊谢谢

你分那么细！！呜呜。。。没钱了呢！！你就一个包撒！！不过还是多谢楼主共享哈。！！！

谢谢无私奉献

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