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| ... | ... | @@ -1,11 +1,13 @@ |
| 1 | 1 | {{TOC}} |
| 2 | 2 | |
| 3 | 3 | Random variables can be adjusted to satisfy a specific constraint. <br/> |
| 4 | -For example we might adjust the variable x to be always greater than the variable y.<br/> | |
| 4 | +For example we might adjust the variable x to be always greater than the variable y by using | |
| 5 | +the command `\randadjustIf{x,y}{x<=y}`<br/> | |
| 5 | 6 | |
| 6 | 7 | The command `\randadjustIf` has the syntax `\randadjustIf{[varlist]}{[relation]}` . |
| 7 | 8 | * **varlist** comma separated list of variables to be adjusted |
| 8 | -* **relation** a relation that defines an avoidance condition under which the variables in varlist should be adjusted | |
| 9 | +* **relation** a relation that defines an avoidance condition under which the variables | |
| 10 | +in varlist should be adjusted. | |
| 9 | 11 | |
| 10 | 12 | ```LaTeX |
| 11 | 13 | \begin{question} |
| ... | ... | @@ -22,6 +24,24 @@ The command `\randadjustIf` has the syntax `\randadjustIf{[varlist]}{[relation]} |
| 22 | 24 | \end{question} |
| 23 | 25 | ``` |
| 24 | 26 | |
| 27 | +The avoidance_relation has to be a logical (boolean) combination (use $$NOT$$, $$AND$$, $$OR$$) of simple comparison | |
| 28 | +relations $$(=, !=, <, <=, >, >=)$$ between **expressions** in the variables. | |
| 29 | + | |
| 30 | +These expressions may include **random and non-random** variables defined in the same variable | |
| 31 | +environment. | |
| 32 | + | |
| 33 | +See [Expressions And Relations](Expressions-And-Relations.md#relations-usable-in-randadjustif) | |
| 34 | +for a more detailed description. | |
| 35 | + | |
| 36 | +*Hint*: | |
| 37 | + | |
| 38 | +* Make sure that the avoidance relation can be avoided at all for the random variables with the ranges given. | |
| 39 | +The `\randint` commands jointly define a product set which has to have a non-empty intersection with the | |
| 40 | +complement of the avoidance set. Otherwise you get a runtime error when the problem is run. | |
| 41 | +* Even if the intersection is non-empty but has a equi-distribution probability being too small, | |
| 42 | +a runtime error might be the result, though the algorithm tries its best to find an admissible point. | |
| 43 | + | |
| 44 | + | |
| 25 | 45 | <div class="alert green"> |
| 26 | 46 | \randadjustIf on a variable defined by \drawFromSet only works for (the default) type _number_ |
| 27 | 47 | </div> |
| ... | ... | @@ -71,4 +91,6 @@ You may use `\randadjustIf` in the same |
| 71 | 91 | manner as explained above, also multiple times for disjoint sets of global variables. You should *NOT* adjust |
| 72 | 92 | global variables within a question, but only in the problem environment where they are defined. |
| 73 | 93 | |
| 74 | -[Alternatively use a switch/case statement](Switch-Case-Statement) | |
| 94 | +[Alternatively use a switch/case statement](Variables.md#switchcase-statements) | |
| 95 | + | |
| 96 | + | |
| 75 | 97 |