Shortcut: ONES

Module	generic
Description	Usage
Create a constant vector with all elements equal to one
output value	type
a vector of ones with the required number of elements	scalar/vector

Further details and examples

Create a constant vector with all elements equal to one

The following input creates and outputs a constant vector with 10 elements that are all equal to one

Click on the labels of the actions for more information on what each action computes

onesThe ONES action with label ones calculates the following quantities:
 Quantity   
 Type   
 Description  
ones
vector
a vector of ones with the required number of elements: ONESCreate a constant vector with all elements equal to one This action is a shortcut. More details SIZEthe number of ones that you would like to create=10
# PLUMED interprets the command:
# ones: ONES SIZE=10
# as follows (Click the red comment above to revert to the short version of the input):
onesThe CONSTANT action with label ones calculates the following quantities:
 Quantity   
 Type   
 Description  
ones
vector
the constant value that was read from the plumed input: CONSTANTCreate a constant value that can be passed to actions More details NOLOG do not report all the read in scalars in the log VALUESthe numbers that are in your constant value=1,1,1,1,1,1,1,1,1,1
# --- End of included input --- PRINTPrint quantities to a file. More details ARGthe labels of the values that you would like to print to the file=ones FILEthe name of the file on which to output these quantities=onesfile

Notice that the ONES action is a shortcut to CONSTANT.

This action is used extensively when calculating coordination numbers in inputs similar to this one:

Click on the labels of the actions for more information on what each action computes

c1The CONTACT_MATRIX action with label c1 calculates the following quantities:
 Quantity   
 Type   
 Description  
c1
matrix
a matrix containing the weights for the bonds between each pair of atoms: CONTACT_MATRIXAdjacency matrix in which two atoms are adjacent if they are within a certain cutoff. More details GROUPspecifies the list of atoms that should be assumed indistinguishable=1-7 SWITCHthe input for the switching function that acts upon the distance between each pair of atoms. Options for this keyword are explained in the documentation for LESS_THAN.={RATIONAL R_0=2.6 NN=6 MM=12}
onesThe ONES action with label ones calculates the following quantities:
 Quantity   
 Type   
 Description  
ones
vector
a vector of ones with the required number of elements: ONESCreate a constant vector with all elements equal to one This action is a shortcut. More details SIZEthe number of ones that you would like to create=7
# PLUMED interprets the command:
# ones: ONES SIZE=7
# as follows (Click the red comment above to revert to the short version of the input):
onesThe CONSTANT action with label ones calculates the following quantities:
 Quantity   
 Type   
 Description  
ones
vector
the constant value that was read from the plumed input: CONSTANTCreate a constant value that can be passed to actions More details NOLOG do not report all the read in scalars in the log VALUESthe numbers that are in your constant value=1,1,1,1,1,1,1
# --- End of included input --- ccThe MATRIX_VECTOR_PRODUCT action with label cc calculates the following quantities:
 Quantity   
 Type   
 Description  
cc
vector
the vector that is obtained by taking the product between the matrix and the vector that were input: MATRIX_VECTOR_PRODUCTCalculate the product of the matrix and the vector More details ARGthe label for the matrix and the vector/scalar that are being multiplied=c1,ones
PRINTPrint quantities to a file. More details ARGthe labels of the values that you would like to print to the file=cc FILEthe name of the file on which to output these quantities=colvar

For more information on why this is useful see CONTACT_MATRIX

Syntax

The following table describes the keywords and options that can be used with this action