How to find angle made by tangent at the end of a curve?

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Purush otham
Purush otham 2018-5-8
评论： Torsten 2018-5-15
Hi,
I have attached the image of a curve obtained by using ode45 . Now my intention is to find the angle that the tangent at final points of the free end of the curve makes with the x-axis.
How do I do it?
Thank you

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KSSV
KSSV 2018-5-8
Get the equation of tangent.....convert it to y = mx+c form......m should gives you slope which is the angle you want.
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Purush otham
Purush otham 2018-5-15
What to do if I am getting negative slope, though clearly the plot is not? I tried abs but it does not give the correct angle. The correct angle is only obtained when subtracted from 180 or added with 90.
Torsten
Torsten 2018-5-15
Instead of posting a figure, you should include the calculated coordinates of the last - say - 5 points of the curve.

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