9.1. parameter command¶

parameter(tag, <specific parameter args>)¶

In DDM-based FE response sensitivity analysis, the sensitivity parameters can be material, geometry or discrete loading parameters.

`tag` (int)	integer tag identifying the parameter.
`<specific parameter args>`	depend on the object in the FE model encapsulating the desired parameters.

Note

Each parameter must be unique in the FE domain, and all parameter tags must be numbered sequentially starting from 1.

9.1.1. Examples¶

To identify the elastic modulus, E, of the material 1 at section 3 of element 4, the <specific object arguments> string becomes:
```
parameter(1, 'element', 4, 'section', 3, 'material', 1, 'E')
```
To identify the elastic modulus, E, of elastic section 3 of element 4 (for elastic section, no specific material need to be defined), the <specific object arguments> string becomes:
```
parameter(1, 'element', 4, 'section', 3, 'E')
```
To parameterize E for element 4 with material 1 (no section need to be defined), the <specific object arguments> string simplifies as:
```
parameter(1, 'element', 4, 'material', 1, 'E')
```

Note

Notice that the format of the <specific object arguments> is different for each considered element/section/material. The specific set of parameters and the relative <specific object arguments> format will be added in the future.