(spinw-setunit)=

# spinw.setunit method

## Syntax
  
`setunit(obj,Name,Value)`
  
## Description
  
`setunit(obj,Name,Value)` sets the physical units of the Hamiltonian.
This includes the magnetic field, exchange interaction, length and
temperature.
  
## Input Arguments
  
`obj`
: [spinw](#spinw) object.
  
## Name-Value Pair Arguments
  
`'mode'`
: Type of unit system, defined by one of the following strings:
  * `'AmeVTK'`    Typical units used in neutron/x-ray scattering:
                      [Å, meV, Tesla and Kelvin]
  * `'1'`         No units, all conversion factors are set to 1.
 
## See Also
 
[spinw.unit](#spinw-unit)