MATLAB: Hi, please if I have too matrix like this how can I calculate the distance between them and thank you

image processingMATLABmatrix

norm(r-p)

imtool('moon.tif')

Click the Distance tool button in the Image Viewer toolbar or select Measure Distance from the Tools menu. The Distance tool allows you to measure distance with a click-and-drag approach. When you move the pointer over the image, the pointer changes to cross hairs . Position the cross hairs at the beginning of the region you wish to measure, hold down the mouse button, drag the cross hairs to the end of the region, and release the button.
The Distance tool displays the Euclidean distance between the two endpoints of the line in a label superimposed over the line. The tool specifies the distance in data units determined by the XData and YData properties, which is pixels, by default.

Okay, done! I'm writing here the solution, so it could be helpful if someone will have my same problem!

Basically, I've inverted a linear relationship between the vector, that is:

p0=o10+R*p1

Now, if you know p0 and p1, you can calculate R and then:

o10=p0-R*p1

It's been really easy, but I didn't know this equation.

I hope it can help someone else! :D