Hi, I was wondering if anyone has created a way of interactively showing the slope between 2 points that one can move around in a figure. Lets say I plot something which is close to linear. Then I want to be able to set two markers, maybe one in the end and one in the beginning which can give me the slope between these two points. Then I want to be able to move these two points around to see the slope at different positions in the figure. This feature exists in many measurement programs and I would be suprised if matlab doesnt have this interactive feature. Any ideas?Thanks, Fredrik Lindelöw