Convert model from discrete to continuous time

converts a the discrete-time dynamic system
model
`sysc`

= d2c(`sysd`

)`sysd`

to a continuous-time model using zero-order hold on the
inputs.

[1] Franklin, G.F., Powell,D.J.,
and Workman, M.L., *Digital Control of Dynamic Systems* (3rd
Edition), Prentice Hall, 1997.

[2] Kollár, I., G.F. Franklin, and
R. Pintelon, "On the Equivalence of z-domain and s-domain Models in System
Identification," *Proceedings of the IEEE ^{®} Instrumentation and Measurement Technology Conference,
*Brussels, Belgium, June, 1996, Vol. 1, pp. 14-19.

`c2d`

| `d2cOptions`

| `d2d`

| `logm`

| `translatecov`