MATLAB实验报告53581471Word文档下载推荐.docx
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x=[21+2*i;
-0.455]
x=
2.00001.0000+2.0000i
-0.45005.0000
z2=12*log(x+sqrt(1+x))
z2=
0.65850.6509+0.4013i
-0.61621.0041
(3)z3=×
sin(a+0.3)+ln(),a=-3.0,-2.9,-2.8,…2.8,2.9,3.0
a=-3:
0.1:
3;
z3=(eps(a*0.3)-eps(a*0.2))2.0.*sin(a+0.3)+log((a+0.3)2.0)
z3=
Columns1through5
0.3001+3.1416i0.2624+3.1416i0.2231+3.1416i0.1823+3.1416i0.1398+3.1416i
Columns6through10
0.0953+3.1416i0.0488+3.1416i-0.0000+3.1416i-0.0513+3.1416i-0.1054+3.1416i
Columns11through15
-0.1625+3.1416i-0.2231+3.1416i-0.2877+3.1416i-0.3567+3.1416i-0.4308+3.1416i
Columns16through20
-0.5108+3.1416i-0.5978+3.1416i-0.6931+3.1416i-0.7985+3.1416i-0.9163+3.1416i
Columns21through25
-1.0498+3.1416i-1.2040+3.1416i-1.3863+3.1416i-1.6094+3.1416i-1.8971+3.1416i
Columns26through30
-2.3026+3.1416i-2.9957+3.1416i-37.0245-2.9957-2.3026Columns31through35
-1.8971-1.6094-1.3863-1.2040-1.0498
Columns36through40
-0.9163-0.7985-0.6931-0.5978-0.5108
Columns41through45
-0.4308-0.3567-0.2877-0.2231-0.1625
Columns46through50
-0.1054-0.05130.00000.04880.0953
Columns51through55
0.13980.18230.22310.26240.3001
Columns56through60
0.33650.37160.40550.43830.4700
Column61
0.5008
2.创建一个由10个元素组成的等差数列x,第一个元素是1,第10个元素是20.
(1)计算其元素个数;
(2)取出其中第二个元素赋值给y.
(3)将数组X的前3个元素分别赋值为4,5,6.
(4)将数组X的前5个元素倒序后构成一个字数组赋值给Z。
(5)取出X中的第2到最后一个元素赋值给t。
X=linspace()
X=
Columns1through9
1.00003.11115.22227.33339.444411.555613.666715.777817.8889
Column10
20.0000
(1)>
n=10
n=
10
(2)>
y=X(1,2)
y=
3.1111
(3)>
X(1,1:
3)=[456]
4.00005.00006.00007.33339.444411.555613.666715.777817.8889
20.0000
(4)>
z=[X
(1)X
(2)X(3)X(4)X(5)];
fliplr(z)
ans=
9.44447.33335.22223.11111.0000
(5)>
t=X;
t
(1)=[]
t=
3.11115.22227.33339.444411.555613.666715.777817.888920.0000
3.已知A=,B=,求下列表达式的值。
(1)A+6*B和A-B+I(其中I为单位矩阵)。
(2)A*B和A.*B.
(3)A^3和A.^3.
(4)AB和A\B.
(5)[AB]和[A(1,3),:
);
B^2].
A=[1234-4;
34787;
3657]
A=
1234-4
34787
3657
B=[13-1;
203;
3-27]
B=
13-1
203
3-27
y=A+6*B
1852-10
467105
215349
I=eye(3)
I=
100
010
001
y=A-B+I
1231-3
32884
0671
y=A*B
684462
309-72596
154-5241
y=A.*B
121024
680261
9-13049
y=A^3
3722623382448604
247370149188600766
78688454142118820
y=A.^3
172839304-64
39304343658503
27274625343
y=AB
16.4000-13.60007.6000
35.8000-76.200050.2000
67.0000-134.000068.0000
y=A\B
-0.03130.3029-0.3324
0.0442-0.03230.1063
0.0317-0.11580.1558
y=[AB]
1234-413-1
34787203
36573-27
y=[A([1,3],:
B^2]
451
11019
20-540
4.a=[-1,0.5,0],b=[-3.4,3,-6],求:
a<
b,a>
=b,a==b,a~=b,a<
=0.
a=[-1,0.5,0]
a=
-1.00000.50000
b=[-3.4,3,-6]
b=
-3.40003.0000-6.0000
a<
b
a>
=b
101
a==b
000
a~=b
111
=0
5.A=,B=,计算A&
B,A|B,~A。
A=[-501;
2.612;
081]
-5.000001.0000
2.60001.00002.0000
08.00001.0000
B=[42.50;
060;
-1.201]
4.00002.50000
06.00000
-1.200001.0000
A&
B
A|B
~A
6.求x^3+4x^2-17x-60=0的根。
y=sym('
x^3+4*x^2-17*x-60'
x^3+4*x^2-17*x-60
x=solve(y)
-3
4
-5
7.求多项式2x^4+4x^2-5x在1,2,3,4处的值,对于矩阵的值,以及在矩阵中各点处的值。
p=[24-50];
x=1:
1:
4;
polyval(p,x)
12275172
x=[12;
34];
122
75172
polyvalm(p,x)
97138
207304
8.将多项式G(x)=x^4-5x-17x+129x-180,当x在0:
1:
20时多项式的值y上加上正态分布的随即行向量构成y1,对y1进行拟合,并对多项式y和y1分别进行插值,计算在5.5处的值。
G=[1-5-17129-180];
x=0:
20;
y=polyval(G,x)
Columns1through8
-180-72-140040198576
Columns9through16
130025204410716811016162002299031680
Columns17through21
42588560567245092160115600
z=randn(1,21)
z=
-0.4326-1.66560.12530.2877-1.14651.19091.1892-0.03760.3273
Columns10through18
0.1746-0.18670.7258-0.58832.1832-0.13640.11391.06680.0593
Columns19through21
-0.0956-0.83230.2944
y1=y+z
y1=
1.0e+005*
-0.0018-0.0007-0.00010.0000-0.00000.00040.00200.00580