Shortcut: LOCAL_Q1
| Module | symfunc |
|---|---|
| Description | Usage |
| Calculate the local degree of order around an atoms by taking the average dot product between the q_1 vector on the central atom and the q_3 vector on the atoms in the first coordination sphere. |   |
| output value | type |
| the values of the local steinhardt parameters for the input atoms | vector |
Output components
This action can calculate the values in the following table when the associated keyword is included in the input for the action. These values can be referenced elsewhere in the input by using this Action’s label followed by a dot and the name of the value required from the list below.
| Name | Type | Keyword | Description |
|---|---|---|---|
| lessthan | scalar | LESS_THAN | the number of colvars that have a value less than a threshold |
| morethan | scalar | MORE_THAN | the number of colvars that have a value more than a threshold |
| altmin | scalar | ALT_MIN | the minimum value of the cv |
| min | scalar | MIN | the minimum colvar |
| max | scalar | MAX | the maximum colvar |
| between | scalar | BETWEEN | the number of colvars that have a value that lies in a particular interval |
| highest | scalar | HIGHEST | the largest of the colvars |
| lowest | scalar | LOWEST | the smallest of the colvars |
| sum | scalar | SUM | the sum of the colvars |
| mean | scalar | MEAN | the mean of the colvars |
Further details and examples
Text from manual goes here
Syntax
The following table describes the keywords and options that can be used with this action
| Keyword | Type | Default | Description |
|---|---|---|---|
| SPECIES | optional | not used | the label of the action that computes the Steinhardt parameters for which you would like to calculate local steinhardt parameters |
| SPECIESA | optional | not used | the label of the action that computes the Steinhardt parameters for which you would like to calculate local steinhardt parameters |
| SPECIESB | optional | not used | the label of the action that computes the Steinhardt parameters that you would like to use when calculating the loal steinhardt parameters |
| SWITCH | optional | not used | This keyword is used if you want to employ an alternative to the continuous swiching function defined above |
| LOWMEM | optional | false | this flag does nothing and is present only to ensure back-compatibility |
| LESS_THAN | optional | not used | calculate the number of variables that are less than a certain target value. Options for this keyword are explained in the documentation for LESS_THAN. |
| MORE_THAN | optional | not used | calculate the number of variables that are more than a certain target value. Options for this keyword are explained in the documentation for MORE_THAN. |
| ALT_MIN | optional | not used | calculate the minimum value |
| MIN | optional | not used | calculate the minimum value |
| MAX | optional | not used | calculate the maximum value |
| BETWEEN | optional | not used | calculate the number of values that are within a certain range. Options for this keyword are explained in the documentation for BETWEEN. |
| HIGHEST | optional | false | this flag allows you to recover the highest of these variables |
| HISTOGRAM | optional | not used | calculate a discretized histogram of the distribution of values |
| LOWEST | optional | false | this flag allows you to recover the lowest of these variables |
| SUM | optional | false | calculate the sum of all the quantities |
| MEAN | optional | false | calculate the mean of all the quantities |