MATLAB程序设计与应用刘卫国编课后实验答案.doc

实验一 MATLAB运算基本
1. 先求下列表达式值，然后显示MATLAB工作空间使用状况并保存所有变量。
(1)
(2) ，其中
(3)
(4) ，其中t=0::
解：
M文献:
z1=2*sin(85*pi/180)/(1+exp(2))
x=[2 1+2*i;-.45 5];
z2=1/2*log(x+sqrt(1+x^2))
a=-::;
z3=(exp(.*a)-exp(-.*a))./2.*sin(a+)+log((+a)./2)
t=0::;
z4=(t>=0&t<1).*(t.^2)+(t>=1&t<2).*(t.^2-1)+(t>=2&t<3) .*(t.^2-2*t+1)
运算成果：
z1=2*sin(85*pi/180)/(1+exp(2))
x=[2 1+2*i;-.45 5];
z2=1/2*log(x+sqrt(1+x^2))
a=-::;
z3=(exp(.*a)-exp(-.*a))./2.*sin(a+)+log((+a)./2)
t=0::;
z4=(t>=0&t<1).*(t.^2)+(t>=1&t<2).*(t.^2-1)+(t>=2&t<3) .*(t.^2-2*t+1)
z1 =

z2 =
- +
+ -
z3 =
Columns 1 through 4
+ + + +
Columns 5 through 8
+ + + +
Columns 9 through 12
+ + + +
Columns 13 through 16
+ + + - +
Columns 17 through 20
- + - + - + - +
Columns 21 through 24
- + - + - + - +
Columns 25 through 28
- + - + - + -
Columns 29 through 32
- - - -
Columns 33 through 36
- - - -
Columns 37 through 40
- - - -
Columns 41 through 44
- -
Columns 45 through 48

Columns 49 through 52