How do I read a large list of X,Y co-ordinates from Notepad and plot a graph in Matlab ?

Hello all, I have a large list of points (about 16,000) in Notepad with X and Y co-ordinates. I want to read the list and plot different graphs on the same X and Y axes (i.e. the X axis is the same). How can I read the list in Matlab and plot the graphs based, with different colours ?

Thank You

Answer 1

[Azzi Abdelmalek]

data=dlmread('yourfile.txt');
x=data(:,1);
y=data(:,2);
plot(x,y)

[Stelios Fanourakis]

@Azzi That's nice. But what happens if txt files contains fractional numbers, negative integers or zeros. I cannot use I(x,y), where I is my image to imshow my image with x,y values as coordinators