| This is part of the volumes module |
| It is only available if you configure PLUMED with ./configure –enable-modules=volumes . Furthermore, this feature is still being developed so take care when using it and report any problems on the mailing list. |
Calculate a vector from the input positions with elements equal to one when the positions are in a particular part of the cell and elements equal to zero otherwise
- Examples
- Glossary of keywords and components
- Description of components
By default the value of the calculated quantity can be referenced elsewhere in the input file by using the label of the action. Alternatively this Action can be used to calculate the following quantities by employing the keywords listed below. These quantities can be referenced elsewhere in the input by using this Action's label followed by a dot and the name of the quantity required from the list below.
Quantity | Description |
.#!value | vector of numbers between 0 and 1 that measure the degree to which each atom is within the volume of interest |
- The atoms involved can be specified using
ATOMS | the group of atoms that you would like to investigate. For more information on how to specify lists of atoms see Groups and Virtual Atoms |
ORIGIN | the atom whose vicinity we are interested in examining. For more information on how to specify lists of atoms see Groups and Virtual Atoms |
- Or alternatively by using
ATOM | an alternative to ORIGIN |
- Compulsory keywords
SIGMA | the width of the function to be used for kernel density estimation |
KERNEL | ( default=gaussian ) the type of kernel function to be used |
XLOWER | ( default=0.0 ) the lower boundary in x relative to the x coordinate of the atom (0 indicates use full extent of box). |
XUPPER | ( default=0.0 ) the upper boundary in x relative to the x coordinate of the atom (0 indicates use full extent of box). |
YLOWER | ( default=0.0 ) the lower boundary in y relative to the y coordinate of the atom (0 indicates use full extent of box). |
YUPPER | ( default=0.0 ) the upper boundary in y relative to the y coordinate of the atom (0 indicates use full extent of box). |
ZLOWER | ( default=0.0 ) the lower boundary in z relative to the z coordinate of the atom (0 indicates use full extent of box). |
ZUPPER | ( default=0.0 ) the upper boundary in z relative to the z coordinate of the atom (0 indicates use full extent of box). |
- Options
SERIAL | ( default=off ) do the calculation in serial. Do not parallelize |
OUTSIDE | ( default=off ) calculate quantities for colvars that are on atoms outside the region of interest
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