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,

这个真是好东西啊！！！！！！！！！！！！！

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 b||usv[or  
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 G@Z%[YN
w  
减小字体 增大字体 :@jctH~  
QWa@?BO2p  
2.9.2 指令窗中的 help 指令 mvH8hvD9  
=&08s(A  
2.9.2.1 直接使用 help 获得指令的使用说明 k%gj  
M`K]g&57hL  
【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。 >6yQuB  
k^|z.$+  
help logm }*rSg .  
LOGM Matrix logarithm. !;8Y?c-D  
L = LOGM(A) is the matrix logarithm of A, the inverse of EXPM(A). Complex results are produced if A has negative eigenvalues. A warning message is printed if the computed expm(L) is not close to A. 'cc8xC  
}v}F8}4  
[L,esterr] = logm(A) does not print any warning message, but returns an estimate of the relative residual,norm(expm(L)-A)/norm(A). er24}G8  
?" 4X
&6xl  
If A is real symmetric or complex Hermitian, then so is LOGM(A). u-&V, *3l  
xltN-<n7  
Some matrices, like A = [0 1; 0 0], do not have any logarithms, real or complex, and LOGM cannot be expected to produce one. A z@@0  
]cP%d-x}  
See also EXPM, SQRTM, FUNM. ^@8XJ[C,_  
'kj q C  
2.9.2.2 使用 help 指令进行分类搜索 AJ>E\DK0]  
0J/yd  
【例 2.9.2 .2-1 】运行不带任何限定的 help ，可以得到分类名称明细表。 i|z=WnF$&  
OEl;R7aOB&  
help \?t8[N\_[(  
HELP topics: f_O|  
matlab\general - General purpose commands. )jl@hnA  
matlab\ops - Operators and special characters. TYD( 6N  
matlab\lang - Programming language constructs. ]
Xa]a}[uE  
matlab\elmat - Elementary matrices and matrix manipulation. Czw]5  
matlab\elfun - Elementary math functions. X7OU=+g  
matlab\specfun - Specialized math functions. oQh;lb  
......            ...... #2i$:c~  
For more help on directory/topic, type "help topic". QyL]-zNg  
nI?*[y
}  
2.9.2.3 采用 help topic 指令形式获得具体子类的指令明细 ]tu OWR  
%t,42jQ9  
【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。 3<<wHK;)  
Xh}q/H<  
help elmat BMO,eQcB  
Elementary matrices and matrix manipulation. wN'S+4  
Elementary matrices. ]\K?%z
  
zeros - Zeros array. SaGI4O_\s  
ones - Ones array. ){P`-ZF  
...... ...... Trh t2Iv  
0vLx={i  
Basic array information. [sG`D-\P[  
size - Size of matrix. p_BG#dRM  
length - Length of vector. ^k%+ao  
...... ...... D3aX\ NGP  
<-N eusx%  
Matrix manipulation. 5P #._
Em  
reshape - Change size. uq9mq"  
diag - Diagonal matrices and diagonals of matrix. <<S4l~"o  
...... ...... z =H?@z  
u,iiS4'Ze  
Special variables and constants. i#YDdz  
ans - Most recent answer. 32+N?[9 *  
eps - Floating point relative accuracy. :T$}@& -  
...... ...... X~m57bj  
r)>'cjx/  
Specialized matrices. %P1zb7:8  
compan - Companion matrix. >.P*lT  
gallery - Higham test matrices. qU6!vgM&  
...... ...... _:Q^mV=;j  
>DY/CcG\P  
〖说明〗省略号由笔者所加，用来表示被删除的内容。这样做是出于节省篇幅的考虑。 An(gHi;1$  
YhglL!pC  
rMWvW(@@D  
2.9.3 指令窗中的 lookfor 指令 Eyf17  
h{-en50tN  
【例 2.9.3 -1 】查找包含积分这个关键词的所有指令。 } -4p8Zt  
=aj|auu  
lookfor integral +e>G V61  
ELLIPKE Complete elliptic integral. qDswFs(
 
EXPINT Exponential integral function. M
.5F|7  
DBLQUAD Numerically evaluate double integral. PJKY$s.  
INNERLP Used with DBLQUAD to evaluate inner loop of integral. anz7ae&P'K  
QUAD Numerically evaluate integral, low order method. 6flO;d/v  
QUAD8 Numerically evaluate integral, higher order method. zQ<&[Tuwa  
COSINT Cosine integral function. @.cord`  
SININT Sine integral function. 7>7n|N  
ASSEMA Assembles area integral contributions in a PDE problem. |1ry*~  
COSINT Cosine integral function. W!8$:Ih_Z  
FOURIER Fourier integral transform. .Sw4{m[g  
IFOURIER Inverse Fourier integral transform. </<z7V,{  
SININT Sine integral function.

MATLAB 指令窗中的help指令和lookfor指令 3joMtRB>;  
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 \<%FZT_4~  
减小字体 增大字体 qj*BV  
n!b*GXb\  
2.9.2 指令窗中的 help 指令 %ULd_ES^  
DML0paOm5  
2.9.2.1 直接使用 help 获得指令的使用说明 S!}pL8OE
 
A^c5CJ_  
【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。 Eh_[8:dK  
U/(R_U>=  
help logm ";0-9*I  
LOGM Matrix logarithm. H~hAm  
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. ^
eYJ7&t  
kr1^`>O5  
[L,esterr] = logm(A) does not print any warning message, but returns an estimate of the relative residual,norm(expm(L)-A)/norm(A). DUm/0q&  
W\DJXM]b  
If A is real symmetric or complex Hermitian, then so is LOGM(A). <* PjG}Z.  
I#p-P)Q%S  
Some matrices, like A = [0 1; 0 0], do not have any logarithms, real or complex, and LOGM cannot be expected to produce one. 6d 8n1_  
KRcg  
See also EXPM, SQRTM, FUNM. }>j1j^c1='  
~0.@1zEXj  
2.9.2.2 使用 help 指令进行分类搜索  -gS/  
Z3T26Uk  
【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。 uqy~hY  
DNM~/Oo  
help Sag\wKV8  
HELP topics: i%B$p0U<  
matlab\general - General purpose commands. 0$nJd_gW_  
matlab\ops - Operators and special characters. p/s5[>N  
matlab\lang - Programming language constructs. naB[0I& N  
matlab\elmat - Elementary matrices and matrix manipulation. `+@%l*TQ  
matlab\elfun - Elementary math functions. %^E>~  
matlab\specfun - Specialized math functions. -3b0;L&4>x  
......            ...... wY}+d0Ch  
For more help on directory/topic, type "help topic". xhMdn3~U  
R?\8SdJ  
2.9.2.3 采用 help topic 指令形式获得具体子类的指令明细 0P53dF  
d}415 XA  
【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。 d{GXFT;0  
C{S6Ri  
help elmat N=L urXv  
Elementary matrices and matrix manipulation. {k~$\J?.  
Elementary matrices. AB#hhi#  
zeros - Zeros array. ~JT{!wcE}o  
ones - Ones array. Z#W`0G>'  
...... ...... @49^WY  
-XY]WWlq  
Basic array information. bm7$DKp#  
size - Size of matrix. r*3XM{bZ/@  
length - Length of vector. aH$*Ue@Q  
...... ...... h;unbz  
!p9F'7;Y<  
Matrix manipulation. )5V1HWjU  
reshape - Change size. ~d5{Q?T)  
diag - Diagonal matrices and diagonals of matrix. Wj*6}N/  
...... ...... Yc5$915  
 y.eBFf  
Special variables and constants. h/w- &7t  
ans - Most recent answer. Y2D)$  
eps - Floating point relative accuracy. (}qLxZ/U  
...... ...... q{JD]A:  
>zhbipA  
Specialized matrices. y! 1NS  
compan - Companion matrix. Ia"bP` L  
gallery - Higham test matrices. 4-n.4j|  
...... ...... yq,5M1vR  
kI;^V  
〖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。 b
o"I:)n;  
n<$I,IRE  
9VY_gi=vL  
2.9.3 指令窗中的 lookfor 指令 (c_hX(  
n*xNMw1x"T  
【例 2.9.3 -1 】查找包含积分这个关键词的所有指令。 bU,&|K/  
=UP)b9*h  
lookfor integral =gqZ^v&5U  
ELLIPKE Complete elliptic integral. Mo<p+*8u:  
EXPINT Exponential integral function. p.IfJ|  
DBLQUAD Numerically evaluate double integral. jH G(d$h  
INNERLP Used with DBLQUAD to evaluate inner loop of integral. Qqaf\$X  
QUAD Numerically evaluate integral, low order method. V7v,)a" L  
QUAD8 Numerically evaluate integral, higher order method. M
U^Z*r  
COSINT Cosine integral function. wIiT
:o  
SININT Sine integral function. sR0nY8@F  
ASSEMA Assembles area integral contributions in a PDE problem. 5m3sjcp_  
COSINT Cosine integral function. O&0R ~<n  
FOURIER Fourier integral transform. Zj0&/S  
IFOURIER Inverse Fourier integral transform. 0\o'd\  
SININT Sine integral function.

这真是个好东东啊！！顶

真是好东西啊 zkOgL9 (_8  
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

11-三维边坡稳定分析.pdf (974 K) 下载次数:6