Seminar_06_Model_Programming.Rmd

## Seminar 6: Model Programming {#model_programming} 
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Welcome to the model programming seminar of **Decision Analysis and Forecasting for Agricultural Development**. In this seminar we will look into different options for model programming in the `R` programming environment [@R-base]. In case you have not already installed `R` and `RStudio` you may want to go back to the [Using R and Rstudio](#r_rstudio) seminar and follow the instructions there. Feel free to bring up any questions or concerns in the Slack or to [Dr. Cory Whitney](mailto:cory.whitney@uni-bonn.de?subject=[Seminar_4]%20Decision%20Analysis%20Lecture) or the course tutor.

Remember to start simple then move on to other steps, make sure that you always have a working model at each of the steps in the process, i.e. starting with a skateboard rather than a car part as in this example from [MetaLab](https://twitter.com/metalab).

!['Skateboard, Bike, Car'](images/Model_stages_car_analogy.png)

### Monte Carlo Simulation of Apples and Sheep Agroforestry 

Follow this hypothetical example of a silvopastoral system as your first Monte Carlo simulation in base R. 

![](images/MC_apples_sheep.png){width=50%}

In this video we walk you through the process of running this model. Please follow along and write your own R script. If you ask nicely we might also share the R script.

<iframe width="560" height="315" src="https://www.youtube.com/embed/Wj49RrvjQ5M" frameborder="0" allowfullscreen></iframe>