Merge pull request #854 from bnavigator/iosys-doc-example · python-control/python-control@1f837a5

Original file line number	Diff line number	Diff line change
`@@ -79,13 +79,13 @@ We begin by defining the dynamics of the system`
`79`	`79`	`L = x[1]`
`80`	`80`
`81`	`81`	`# Compute the control action (only allow addition of food)`
`82`		`- u_0 = u if u > 0 else 0`
	`82`	`+ u_0 = u[0] if u[0] > 0 else 0`
`83`	`83`
`84`	`84`	`# Compute the discrete updates`
`85`	`85`	`dH = (r + u_0) * H * (1 - H/k) - (a * H * L)/(c + H)`
`86`	`86`	`dL = b * (a * H * L)/(c + H) - d * L`
`87`	`87`
`88`		`- return [dH, dL]`
	`88`	`+ return np.array([dH, dL])`
`89`	`89`
`90`	`90`	`We now create an input/output system using these dynamics:`
`91`	`91`