state vector

docs/pages/add_block.md

@@ -97,6 +97,7 @@ Below are details on the steps required to implement a new block in svZeroDSolve
 \f$ e \frac{dP_{out}}{dt} + f Q_{out} Q_{out} + g P_{out} + h I_{1} = 0 \f$
 
  * For this block, \f$P_{in}\f$ and \f$Q_{in}\f$ are the pressure and flow at the inlet respectively, \f$P_{out}\f$ and \f$Q_{out}\f$ are the pressure and flow at the outlet, and \f$I_{1}\f$ is an internal variable. 
+ * The state vector is \f$[P_{in}, Q_{in}, P_{out}, Q_{out}, I_{1}]\f$.
  * The contributions to the local `F` matrix are `F[0,0] = b`, `F[1,2] = g` and `F[1,4] = h`.
  * The contributions to the local `E` matrix are `E[0,1] = a` and `E[1,2] = e`.
  * The contributions to the local `C` vector are `C[0] = c*(dP_in/dt)*Q_in + d` and `C[1] = f*Q_out*Q_out`.