Recent content by mykat

Sure. Solving it was never the issue, it was including the unity condition, which as it happens is not necessary.

As it turns out, the constraint was completely unnecessary. The time I wasted on this problem yesterday reflects my poor understanding of differential equations. I am actually working with a Markov model, where the initial conditions dictate that state 1 has probability = 1 and all others are...

Only 7 equations.

By T do you mean transpose? If so, I initially had the matrices in that form. After that I wanted to add the A + B + C = 1 condition, without working out and modifying each line by hand. Is there a way to do this? Sorry if I've completely misunderstood you.

Thank you for the replies. I appreciate the input, I had thought to use a similar method but I wasn't sure if it was applicable. Unfortunately, I have 7 equations and 7 variables, and as I am working with matlab, I need to have them each in the form similar to dA/dt = 3A + 4B... Is there...

Hello all, I don't have much experience with ODEs. I have a simple system, which I believe is first order linear, similar to the following: dA/dt = 2A + 3B - C dB/dt = A + 2B - C dC/dt = -2A + 5B - 2C Now I would like to include the constraint that A + B + C = 1. How do I do this...