File Format

The input file format for PySPG simply consists on lines of text. The first non-blank character of each line is treated as the iteration type, and depending upon this, a different amount of parameters is needed: the different iteration types and parameters are shown in the following table. Please note that each argument is separed by any blank (spaces or tabs).

1. • +   var_name   min_val   max_val   step
   • Iterates linearly the variable var_name starting with min_val and finishing at max_val using step as step
2. • *   var_name   min_val   max_val   step
   • Iterates geometricaly the variable var_name starting with min_val and finishing at max_val using step as step
3. • .   var_name   value₁   value₂  value₃
   • The variable var_name takes consequtively the values value₁, value₂, ...
4. • :   var_name   value
   • The variable var_name is kept fixed at value value
   • =   var_name   formula
   To the variable var_name it is given a value computed as formula. This formula can have any of the variables defined in the para.dat file.
   • • #   repetitions
     • The other variables do no change, while the simulation is repeated repetitions times

Examples

1. A simulation in which D=0.4, k=0.2 are kept fixed and a varies linearly between 1 and 5 with a step of .2.

   :D   0.4
   :k   0.2
   +a   1 5 .2
   

2. Now, D=0.4, k varies linearly between 0 and 3 step 0.25 anda varies geometrically beginning with 0.1 and finishng at 12.8 step 2.

   :D   0.4 
   +k   0.0 3.0 0.25
   *a   0.1 12.8 2.
   

3. Finally, D=0.4, and D=0.6, The other parameters as in the previous example (the step of k is set to 1.). But the simulation mustbe repeated 100 times

   .D   0.4  0.6
   +k   0.0  3.0   1.
   *a   0.1  12.8  2.
   # 100
   

Storage of data

Examples

1. For the file in Example 1: the output files are left in the CWD -just one varying iterator-
2. For the file in Example 2: the following directories are created

   |
   +--   k-0.0
   +--   k-0.25
   +--   k-0.5
   +--   k-0.75
   +--   k-1.0
   +--   k-1.25
   +--   k-1.5
   +--   k-1.75
   +--   k-2.0
   +--   k-2.25
   +--   k-2.5
   +--   k-2.75
   +--   k-3.0
   

   And the output files are generated in each directory
3. For the file in Example 3: the following directories are created

   |
   +--   D-0.4
   +------   k-0.0
   +------   k-1.0
   +------   k-2.0
   +------   k-3.0
   +--   D-0.6
   +------   k-0.0
   +------   k-1.0
   +------   k-2.0
   +------   k-3.0
   

Syntactic sugar

+D   0. pi pi/20.
+k   sin(pi/4) exp(3**2) 0.5

+D   0. pi pi/ 20.