Shortcut: PRODUCT

Module	function
Description	Usage
Calculate the product of the input quantities
output value	type
the product of all the elements in the input vector	scalar

Further details and examples

Calculate the product of the input quantities

This shortcut can be used to calculate the product of a collection of scalar inputs as illustrated by the following simple example.

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

d1The DISTANCE action with label d1 calculates the following quantities:
 Quantity   
 Type   
 Description  
d1
scalar
the DISTANCE between this pair of atoms: DISTANCECalculate the distance/s between pairs of atoms. More details ATOMSthe pair of atom that we are calculating the distance between=1,2
d2The DISTANCE action with label d2 calculates the following quantities:
 Quantity   
 Type   
 Description  
d2
scalar
the DISTANCE between this pair of atoms: DISTANCECalculate the distance/s between pairs of atoms. More details ATOMSthe pair of atom that we are calculating the distance between=3,4
pThe PRODUCT action with label p calculates the following quantities:
 Quantity   
 Type   
 Description  
p
scalar
the product of all the elements in the input vector: PRODUCTCalculate the product of the input quantities This action is a shortcut. More details ARGThe set of scalars that you would like to multiply together=d1,d2
# PLUMED interprets the command:
# p: PRODUCT ARG=d1,d2
# as follows (Click the red comment above to revert to the short version of the input):
p_vecThe CONCATENATE action with label p_vec calculates the following quantities:
 Quantity   
 Type   
 Description  
p_vec
vector
the concatenated vector/matrix that was constructed from the input values: CONCATENATEJoin vectors or matrices together More details ARGthe values that should be concatenated together to form the output vector=d1,d2
p_logsThe CUSTOM action with label p_logs calculates the following quantities:
 Quantity   
 Type   
 Description  
p_logs
vector
the vector obtained by doing an element-wise application of an arbitrary function to the input vectors: CUSTOMCalculate a combination of variables using a custom expression. More details ARGthe values input to this function=p_vec FUNCthe function you wish to evaluate=log(x) PERIODICif the output of your function is periodic then you should specify the periodicity of the function=NO
p_logsumThe SUM action with label p_logsum calculates the following quantities:
 Quantity   
 Type   
 Description  
p_logsum
scalar
the sum of all the elements in the input vector: SUMCalculate the sum of the arguments More details ARGthe values input to this function=p_logs PERIODICif the output of your function is periodic then you should specify the periodicity of the function=NO
pThe CUSTOM action with label p calculates the following quantities:
 Quantity   
 Type   
 Description  
p
scalar
an arbitrary function: CUSTOMCalculate a combination of variables using a custom expression. More details ARGthe values input to this function=p_logsum FUNCthe function you wish to evaluate=exp(x) PERIODICif the output of your function is periodic then you should specify the periodicity of the function=NO
# --- End of included input --- 

This action is currently only used in the DETERMINANT shortcut. In that action the determinant of the input square matrix is found by finding the eigenvalues of the input matrix using DIAGONALIZE. The determinant is then found by evaluating the product of these eigenvalues.

Syntax

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