# Price input format

When running Prodrisk from the command line, price input is given by a combination of three files:
- **PRISREKKE.PRI/PRISREKKE.CSV**
- **PRISAVSNITT.DATA**
- **PRISREKKE.PRISMOD**


## PRISREKKE.PRI
The file **PRISREKKE.PRI** should contain spot market prices for all weeks in all historical years. Within each week, prices are given with price period [](../time_resolution/time_resolution.md) resolution. The file structure is presented below.

**';.'** - Seperator and decimal sign  
**2;'';;'';'';**  
**3;'';'';'';**  
**3;3;0;10;** - 3, 3, (0=Parallell, 1=Serial), Number of weeks  
**10;1;10;** - Number of weeks, start week, end week  
**2;1901;1902;** - Number of historical years, historical years    
**4;25;89;40;14;** - Number of price periods, hours per price period (should add up to 168)   
**;;1;2;3;4;5;6;7;8;9;10;** - Index for each week  
**1901;1;...** - Historical year, price period, (price week 1), (price week 2), etc  
**1901;2;...**  
**1901;3;...**  
**1901;4;...**  
**1902;1;...**  
**1902;2;...**  
**1902;3;...**  
**1902;4;...**  

Starting with the price time series file **PRISREKKE.PRI**, **PRISREKKE.CSV** or any other **pricefilename.csv**, as described below, *genpris* can be run. In *genpris*, the number of price nodes is decided:

![](./genpris.png)

*genpris* generates the file **PRISREKKE.PRISMOD** (or **pricefilename.PRISMOD**). 

## PRISAVSNITT.DATA
The file **PRISAVSNITT.DATA** must correspond to the number of price periods in the price time series. The file is auto generated in the program *ltm*, see *LTM* documentation for further information. However, the price periods in the two files (**pricefilename.PRI** and **PRISAVSNITT**) must be consistent.
**PRISAVSNITT.DATA** controls the coupling between individual hours of the week and the chosen price periods [](../time_resolution/time_resolution.md)-->. The file structure is presented below.

**1,** - deprecated, write "1,"  
**4,** - number of price periods  
**1, 'pricePeriod1        ',** - price period index and name  
**2, 'pricePeriod2        ',**  
**3, 'pricePeriod3        ',**  
**4, 'pricePeriod4        ',**  
**3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Mon** - corresponding price period for each hour  
**3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Tue**  
**3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Wed**  
**3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Thu**  
**3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Fri**  
**2, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Sat**  
**2, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,Sun**  

## PRISREKKE.PRISMOD
The file **PRISREKKE.PRISMOD** contains price nodes and transition probabilities for the price model used during backwards recursion. It is generated by the program _*genpris.exe* which takes **PRISREKKE.PRI** and **PRISAVSNITT.DATA** as input. If the price input is changed between Prodrisk runs, *genpris.exe* should be run such that PRISREKKE.PRISMOD correctly represents the edited price input. 

![](./price_node_probabilities.png)