matlab序列移位函数（关于matlab中函数的移位！！在线等）

本文目录

• 关于matlab中函数的移位！！在线等
• matlab 问题
• matlab中的位函数bitshift（A,k,n）如何使用
• matlab移位函数的应用
• 解疑 MATLAB循环移位
• matlab编程中的序列翻转移位指令

关于matlab中函数的移位！！在线等

x1=-10:0.1:10;
y1=raylpdf(x1+4.8,4.8);
x2=-10:0.1:10;
y2=normpdf(x2,0,3.16);
figure
plot(x1,y1,x2,y2)

matlab 问题

clear all;

clc;

I1=imread(’D:\ebook\ref.bmp’);

I2=imread(’D:\ebook\swt.bmp’);

unregistered =I2;%%未配准图像

rect=I1;%%参考图像

cpselect(unregistered(:,:,1),rect);%%%选择点对，选完后记得保存

uiwait(msgbox(’Click OK after closing the CPSELECT window.’,’Waiting...’))

input_points_corr= cpcorr(input_points,base_points,unregistered,rect);

tform = cp2tform(input_points_corr,base_points,’linear conformal’);%%仿射变换

registered = imtransform(unregistered,tform,’XData’,[1 300], ’YData’,[1 300]);%%对图像进行重采样

H.Position=[232 258 600 402];

figure(H)

subplot(2,2,1)

imagesc(rect)

title(’Original image 1’)

subplot(2,2,3)

imagesc(unregistered)

title(’Unmatched image 2’)

subplot(2,2,2)

imagesc(rect)

title(’Original image 1’)

subplot(2,2,4)

imagesc(registered)

title(’Matched image 2’)

colormap (gray)

步骤：

1 运行程序，在input里点一个点，在base里在大概相等的位置点一个点，这个两个点构成点对；

2 选取三对以上的点（仿射变换，至少需要三对点）；

3 选完后，点file -save points to workspace ，然后再点击ok按钮；

这函数不是很好，你选取的点对位置差不多的话，配准较好，差的远的话，配准会失效；

matlab中的位函数bitshift（A,k,n）如何使用

k是移位的位数，n是有用位数！
clc;
a=[1 3 5 7];
a1=bitshift(a,3)
dec2bin(a1)
a2=bitshift(a,3,1)
dec2bin(a2)

a2=bitshift(a,3,2)
dec2bin(a2)

a2=bitshift(a,3,3)
dec2bin(a2)

a2=bitshift(a,3,4)
dec2bin(a2)

a2=bitshift(a,3,5)
dec2bi
Matlab的两种移位运算：

1） circshift 矩阵移位
circshift ：Shift array circularly
Syntax ： B = circshift(A,shiftsize)
Description ：
B = circshift(A,shiftsize) circularly shifts the values in the array, A, by shiftsize elements. shiftsize is a vector of integer scalars where the n-th element specifies the shift amount for the n-th dimension of array A. If an element in shiftsize is positive, the values of A are shifted down (or to the right). If it is negative, the values of A are shifted up (or to the left). If it is 0, the values in that dimension are not shifted.

Example ：
Circularly shift first dimension values down by 1.
A = [ 1 2 3;4 5 6; 7 8 9]
A =
1 2 3
4 5 6
7 8 9
B = circshift(A,1)
B =
7 8 9
1 2 3
4 5 6

Circularly shift first dimension values down by 1 and second dimension values to the left by 1.
B = circshift(A,[1 -1]);
B =
8 9 7
2 3 1
5 6 4

2）bitshift 位移位
bitshift ：
Shift bits specified number of places

Syntax ：
C = bitshift(A, k)
C = bitshift(A, k, n)

Description ：
C = bitshift(A, k) returns the value of A shifted by k bits. Input argument A must be an unsigned integer or an array of unsigned integers. Shifting by k is the same as multiplication by 2^k. Negative values of k are allowed and this corresponds to shifting to the right, or dividing by 2^abs(k) and truncating to an integer. If the shift causes C to overflow the number of bits in the unsigned integer class of A, then the overflowing bits are dropped.
C = bitshift(A, k, n) causes any bits that overflow n bits to be dropped. The value of n must be less than or equal to the length in bits of the unsigned integer class of A (e.g., n 《= 32 for uint32).
Instead of using bitshift(A, k, 8) or another power of 2 for n, consider using bitshift(uint8(A), k) or the appropriate unsigned integer class for A.

Examples：

Example 1
Shifting 1100 (12, decimal) to the left two bits yields 110000 (48, decimal).
C = bitshift(12, 2)
C =
48

Example 2

Repeatedly shift the bits of an unsigned 16 bit value to the left until all the nonzero bits overflow. Track the progress in binary:
a = intmax(’uint16’);
disp(sprintf( ...
’Initial uint16 value %5d is %16s in binary’, ...
a, dec2bin(a)))
for k = 1:16
a = bitshift(a, 1);
disp(sprintf( ...
’Shifted uint16 value %5d is %16s in binary’,...
a, dec2bin(a)))
end

n(a2)

matlab移位函数的应用

你向量n的长度和向量x的长度不一样啊，
x=[zeros(1,2)
x2];等于你在原来x2元素前面添加了两个0
n还是原来的长度，
stem(n,x)肯定不能运行出来啊

解疑 MATLAB循环移位

可以直接使用MATLAB自带的函数circshift:

circshift(a,[0,-3])

它的意思是将a的行不换,a的前3列置后

a=1:10;b=circshift(a,[0,-3])
b =
4 5 6 7 8 9 10 1 2 3

matlab编程中的序列翻转移位指令

circshift（a,[n1,n2]）循环移位函数，自己看帮助。
至于翻转自己编吧，挺简单的，比如：第一个为循环移位，第二个为翻转
a =
1 2 3 4 5 6 7
》》 circshift(a,[0,2])
ans =
6 7 1 2 3 4 5

for i=1:length(a)
b(i)=a(length(a)-i+1);
end
b =
7 6 5 4 3 2 1
希望有帮助，纯手打，现编的，试试吧。