Computes the value of a signal at a particular time, T=t*.

## Example

Assume that you wish to compute the steering wheel angle in a suspension at T=2.4
seconds.

Here is a code snippet that will compute the steering wheel angle at
T=2.4s.

```
>>> val = ValueAtTime (label = "Steer Wheel Angle @ T=2.4s",
measuredValue = "RTOD * AZ(77,66)",
atTime = 2.40,
delta = 0.1,
)
```

The calculation in ValueAtTime is implemented for this example as:

(1)
$$\begin{array}{l}\text{f(t)=measuredValue}\\ \delta \text{(t)=Step(time,atTime-delta,0,atTime,1)+}\\ \text{Step(time,atTime,1,atTime+Delta,0)-1}\\ \text{response=}\frac{{\displaystyle \underset{to}{\overset{tf}{\int}}\text{f(t)}\delta \text{(t)dt}}}{{\displaystyle \underset{to}{\overset{tf}{\int}}\delta \text{(t)dt}}}=\frac{1}{\text{delta}}{\displaystyle \underset{to}{\overset{tf}{\int}}\text{f(t)}\delta \text{(t)dt}}\end{array}$$