# SteelMP Command
-
In DDM-based FE response sensitivity analysis, the sensitivity
parameters can be material,
-
geometry or discrete loading parameters. Each parameter should be
defined as:
```tcl
parameter $tag <specific object
arguments>
```
tag
|
integer tag identifying the parameter. |
<specific object arguments> |
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.
-
EXAMPLE
- To identify the elastic modulus, E, of the material 1 at section 3
of element 4, the <specific object arguments> string becomes
```tcl
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:
```tcl
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:
```tcl
parameter 1 element 4 material 1 E
```
-
Notice that the format of the <specific object arguments> is
different for each considered element/section/material. The user is
referred to the corresponding section of this manual for the specific
set of parameters and the relative <specific object arguments>
format.