MATLAB: How to compute the absolute value of a symbolic vector

vectors

How can i obtain the absolute value of a symbolic vector?

Best Answer

I am not exactly certain what you want to do, but norm may be what you want.

For example:

syms Vx Vy Vz
V = [Vx; Vy; Vz];
norm1 = norm(V, 1)

produces:

norm1 =
abs(Vx) + abs(Vy) + abs(Vz)

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MATLAB: Grid of values spacing in logarithmic scale

I am not certain what you want.

Try this:

xv = logspace(-5, -1, 25);
yv = linspace(0, 1, numel(xv));
figure
semilogx(xv, yv)
grid

MATLAB: How to make this ode45 work

Your equations must be set up as differential equations, using the Symbolic Math Toolbox diff function to create the derivatives.

Then, use the odeToVectorField and matlabFunction functions to create the necessary first-degree equations and the anonymous function to use with ode45.

Best Answer

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MATLAB: Grid of values spacing in logarithmic scale

MATLAB: How to make this ode45 work

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