![]() Working with wind direction vectors can be confusing, because there are two different conventions which are both widely used. ![]() m in your current folder: function Dq = electric(t,q) %q(1),q(2) are the states %Dq(i) is the derivative of the ith state Dq = zeros(2,1) Dq(1) = q(2) Dq(2) = -625*q(1)-40*q(2)+100*cos(10*t) end Matlab Jack Chessa 3rd October 2002 1 Introduction The goal of this document is to give a very brief overview and direction in the writing of nite element code using Matlab. However, atan2() yields A direction field or a slope field for a first order differential equation d y / d x = f ( x, y), is a field of short either straight line segments or arrows of slope f ( x,y) drawn through each point ( x,y) in some chosen grid of points in the ( x,y) plane. For example, if one wants to use vertical line smoothers MATLAB tutorial. The next image is an example of an area with all sort of edges.
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