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```{index} single: PDL::Trans
```

# PDL::Trans

```{pperl-module-badges} PDL::Trans
```

## Modules

- [`PDL::Trans::VTable`](Trans/VTable)

## Functions

### Dataflow and views

#### `parents`

`$trans->parents` - the ndarrays the transformation reads.

#### `children`

`$trans->children` - the ndarrays the transformation produces.

#### `address`

`$trans->address` - the memory address of the transformation, the number its reference holds. For debugging.

#### `bvalflag`

`$trans->bvalflag` - whether the transformation handles bad values.

#### `flags`

`$trans->flags` - the names of the flags set on the transformation, such as `PDL_ITRANS_ISAFFINE`.

#### `vtable`

`$trans->vtable` - the description of the operation behind the transformation, a `PDL::Trans::VTable` object.

#### `affine`

`$trans->affine` - 1 when the transformation is a view expressed as an offset and a step per dimension, 0 otherwise.

#### `offs`

`$trans->offs` - the offset of an affine view into its parent's data.

#### `incs`

`$trans->incs` - the step per dimension of an affine view. Dies for a transformation that is not affine.

#### `trans_children_indices`

`$trans->trans_children_indices` - for each parent, the slot the transformation occupies in that parent's list of children.

#### `ind_sizes`

`$trans->ind_sizes` - the size of each named dimension of the operation's signature.

#### `inc_sizes`

`$trans->inc_sizes` - the step in elements for each dimension of each parameter of the operation.

```{toctree}
:hidden:
:maxdepth: 1

Trans/VTable
```