how to reverse,scale and shift an acquired signal?

i want a concise code to perform simple operations on an acquired signal which is in cvv format.

[syed fiaz]

I need time reversal property for DFT coding

Answer 1

[Aneesh Deshmukh]

    % code
clc;
clear all;
close all;
s = xlsread('C:\Users\ADMIN\Desktop\DSO00001.csv');
x = s(:,1);
y = s(:,2);
x1 = 0;
y1 = 0;
c = 0;
disp('1)Time Scale:');
disp('2)Time Shift:');
disp('3)Time Reversal:');
disp('4)Scale,Shift and Reversal:');
while((c >=5 || c<=0))
c = input('Enter choice: ');
switch(c)
    case 1
        a = input('Enter Scaling factor: ');
        x1 = x/a;
        y1 = y;
    case 2
        b = input('Enter shifting factor: ');
        x1 = (x-b);
        y1 = y;
    case 3
        x1 = (-1)*x;
        y1 = y;
    case 4
        a = input('Enter Scaling factor: ');
        b = input('Enter shifting factor: ');
        x1 = (-1)*(x-(b*a))/a;
        y1 = y;
     otherwise
        disp('Invalid Input');
end
if(c>0 && c<5)
    subplot(1,2,1)
    plot(x,y)
    xlabel('t')
    ylabel('signal')
    grid on
    title('Original Signal:')

    subplot(1,2,2)
    plot(x1,y1)
    xlabel('t')
    ylabel('signal')
    grid on
    title('Resultant Signal:')
    hold on;
end
end
%given below is the output for reversing%

Answer 2

[syed fiaz]

Time reversal property for DFT of matlab code