MATLAB: How to perform right circular shift

circular shift

Hi. I have written a code to perform circular shift but it does not give me all X28 and Y28 keys . It returns only one X28 and Y28 with out any circular shift.What I did wrong

key_56=1:56;
x=key_56(1:28);
y=key_56(29:56);
R_key=[1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 1];
icount=0;
for i=1:16
    icount=icount+R_key(i);
    I=icount;
end
%circular shift
X28 = circshift(x', -icount)';
Y28 = circshift(y', -icount)';

Best Answer

key_56=1:56;
x=key_56(1:28);
y=key_56(29:56);
R_key=[1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 1];
shift_counts = cumsum(R_key);
num_shifts = length(shift_counts);
x_shifted = zeros(num_shifts, length(x));
y_shifted = zeros(num_shifts, length(y));
for i = 1 : num_shifts
    x_shifted(i, :) = circshift(x, -shift_counts(i));
    y_shifted(i, :) = circshift(y, -shift_counts(i));
end

Related Solutions

MATLAB: Caesar cyphor encryption problem .

function coded = caesar(M, n)
num = double(M);                        %Converts string into double
num2 = num;
N = n - 95 * fix(n/95);
for i = 1:length(num);  
    if  num(i) + N < 32                 %If ASCII value goes below 32
        num2(i) = 126 - (31- num(i) - N);
    elseif num(i) + N > 126             %If ASCII value goes beyond 126
        num2(i) = 32 + (num(i) + N -127);
    else 
        num2(i) = num(i) + N ;          %If ASCII value goes normal
    end
coded = char(num2);
end

I spent halfhour on solving this problem, a little bit hard.

This is correct code. Hope it helps.

MATLAB: Matrix Manipulation/Shifting

Hi, I understand you are trying to shift matrix using imwarp function. You can do this by manipulating Displacement field of the imwarp function. Here is a sample code.

clc;clear all;
%Definng a matrix:
Matrix=[1 2 3;4 5 6;7 8 9;10 11 12;13 14 15; 16 17 18; 19 20 21;22 23 24;25 26 27;28 29 30;31 32 33; 34 35 36];
[r,c]=size(Matrix);
%Out_mat=zeros(r,c+1);
%Defining Displacement
X_disp=[-ones(3,c+1);zeros(6,c+1);-ones(3,c+1)]; % X displacement
Y_disp=zeros(r,c+1); % Y displacement
Disp(:,:,1)=X_disp;
Disp(:,:,2)=Y_disp;
%Imwrap
Out_mat=imwarp([Matrix zeros(r,1)],Disp);

Best Answer

Related Solutions

MATLAB: Caesar cyphor encryption problem .

MATLAB: Matrix Manipulation/Shifting

Related Question