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h2. Name

add --- Add a constant value to a dataset or add two datasets together

h2. Syntax
{code:|borderStyle=solid|borderWidth=1|bgColor=#ffffaa}
add hi hiname ;# add active dataset to workspace hiname dataset, result in hiname.

add lo hiname ;# add active dataset to workspace hiname dataset, result in active.

add value ;# add value to active dataset, result in active data.

add x | y | sca value ;# add value to x or y or scalar coordinates.

add x | y | z | sca [value] xx | yy | zz | sca [factor] ;# add data coordinates together.
{code}

h2. Description

The add command will add a constant value to a dataset or add two datasets together. add works on grid and polydata type of dataset. The result dataset is changed.

    * Grid: The two datasets must have the same grid dimensions.
    * Polydata: The two datasets must have the same number of points. For polydata the target for the adding operation can be any of the xyz coordinates and scalar values.
    * Adding two datasets together: The dataset in active is added to the dataset in hiname. The result data is placed in active if the *lo* argument is used, and in the workspace _hiname_ dataset if the *hi* argument is used. 


h2. Arguments

*hi* _hiname_
{indent}Add dataset in active and hiname and the result data will be placed in workspace hiname. 
{indent}

*lo* _hiname_
{indent}Add dataset in active and hiname and the result data will be placed in active workspace. 
value
    Add value and result data will be placed in the active workspace. 
{indent}

*hi* | *lo* _hiname_ *tes*
{indent}Add two poly dataset together according to rules above and optionally test using the tesargument if xy coordinates are equal and then add only for equal coordinates. 
{indent}

*x* | *y* | *sca* _value_
{indent}Add value to x or y or scalar coordinates. The result data will be placed in the active workspace. 
{indent}
*x* | *y* | *z* | *sca* \[_value_\] *xx* | *yy* | *zz* \[_factor_\]
{indent}Add value to x or y or scalar coordinates. The result data will be placed in the active workspace. Add data coordinate axes together. Optionally use a value that will be added to the coordinates and/or a factor that will be multiplied with the coordinates. x | y | z | sca represents the first data coordinates and xx | yy | zz represents the second data coordinates. The result is always placed in the first coordinates. 
{indent}

h2. Examples

h3. Ex.1: Add two grids

{noformat:|borderWidth=1|bgColor=#eeeeee}
# Add a grid in active to a grid in workspace named mygrid and place the result in active
add lo mygrid
# Add the value 15 to a dataset in active
add 15
{noformat}

h3. Ex.2: Add coordinates
{noformat:|borderWidth=1|bgColor=#eeeeee}
# Add together x and y data coordinates and place the result in x data coordinates.
add x yy
{noformat}


h2. See also

[sub], [mul], [div]