Recent content by blah900

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    Some questions about solving eigenproblems to do modal analysis

    So basically the D becomes the eigenvalues and Q ends up becoming the eigenvector of the A = M-1K Ax=λx equation? And I would just use ARPACK and find the part of the function that does this for me automatically given the stiffness matrix K and mass matrix M? I think I am beginning to...
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    Some questions about solving eigenproblems to do modal analysis

    So for my graphics class I am currently reading "Stochastic Dynamics: Simulating the Effects of Turbulence on Flexible Structures" by Jos Stam However, while starting to implement it, I've realized my understanding of math is not strong enough to fully understand what is going on so I have a...
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    Finding E[X^2] from a given random variable with distinct probability

    Oops my bad. It was supposed to be E of the following values. But, yeah, I guess the way I know would work right?
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    Finding E[X^2] from a given random variable with distinct probability

    Homework Statement Z is a random variable. P(X=a) = p1 P(X=b) = p2 P(X=c) = p3 P(X=d) = p4 Find the variance. Homework Equations Var(X) = E(X2) - E(X)2The Attempt at a Solution Okay so for the E(X2), I am currently very confused. My professor gave us this formula where E(X^2) =...
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