Hello!

So months ago i asked about mesh formulation for use in hydrodynamic simulation using OpenTidalFarm that depends on Fenics. I could simulate the hydrodynamic model with JIT-compiled sinusoidal equation at the boundary. However, i want to use real time-series data as a boundary condition.

Suppose i have time-series data such as :

```
0.3209
0.3209
0.1209
-0.1291
-0.3791
...
```

with specified time interval per data.

Then suppose i have a time variable *t* that increase by *dt* over time. How can i load this data in the Expression function so that when the time variable updates it reads to the next index?

Thank you in advance!