09 May 2012
DataTheif Helps you to extract data points from graphs.
function [x,y] = DataTheif(Image,A,B,C)
%%% By Adnan M El Makdah
% Image is the plot in any format.
% A is the end upper coordinate of the y-axis (i.e. A = [0 1])
% B is the origin coordinate of the graph (i.e. B = [0 0])
% C is the end right coordinate of the x-axis (i.e. C = [1 0])
% when you run the function, you should pick the first three points that
% corresponds to the upper y-axis point, origin, and the left x-axis point
% respectively. Then pick the points on the curve that you want to steal.
% When you are done press enter.
% For any questions: email@example.com
for i = 1:3
Axis(i,:) = ginput(1);
YScale = abs(A(2)-B(2))/abs(Axis(1,2)-Axis(2,2));
XScale = abs(C(1)-B(1))/abs(Axis(3,1)-Axis(2,1));
Points(i,:) = ginput(1);
Points(:,1) = (Points(:,1)- Axis(2,1))*XScale;
Points(:,2) = (( Axis(3,2)-Points(:,2)))*YScale;
x = Points(:,1)+B(1);
y = Points(:,2)+B(2);