Tensor Manipulation Routines

Basic manipulations

mars.tensor.copyto

Copies values from one array to another, broadcasting as necessary.

Shape manipulation

mars.tensor.reshape	Gives a new shape to a tensor without changing its data.
mars.tensor.ravel	Return a contiguous flattened tensor.

Transposition

mars.tensor.moveaxis	Move axes of a tensor to new positions.
mars.tensor.rollaxis	Roll the specified axis backwards, until it lies in a given position.
mars.tensor.swapaxes	Interchange two axes of a tensor.
mars.tensor.core.Tensor.T	Same as self.transpose(), except that self is returned if self.ndim < 2.
mars.tensor.transpose	Permute the dimensions of a tensor.

Edit dimensionalities

mars.tensor.atleast_1d	Convert inputs to tensors with at least one dimension.
mars.tensor.atleast_2d	View inputs as tensors with at least two dimensions.
mars.tensor.atleast_3d	View inputs as tensors with at least three dimensions.
mars.tensor.broadcast_to	Broadcast an tensor to a new shape.
mars.tensor.broadcast_arrays	Broadcast any number of arrays against each other.
mars.tensor.expand_dims	Expand the shape of a tensor.
mars.tensor.squeeze	Remove single-dimensional entries from the shape of a tensor.

Changing kind of tensor

mars.tensor.asarray

Convert the input to an array.

Joining tensors

mars.tensor.concatenate	Join a sequence of arrays along an existing axis.
mars.tensor.stack	Join a sequence of tensors along a new axis.
mars.tensor.column_stack	Stack 1-D tensors as columns into a 2-D tensor.
mars.tensor.dstack	Stack tensors in sequence depth wise (along third axis).
mars.tensor.hstack	Stack tensors in sequence horizontally (column wise).
mars.tensor.vstack	Stack tensors in sequence vertically (row wise).

Splitting tensors

mars.tensor.split	Split a tensor into multiple sub-tensors.
mars.tensor.array_split	Split a tensor into multiple sub-tensors.
mars.tensor.dsplit	Split tensor into multiple sub-tensors along the 3rd axis (depth).
mars.tensor.hsplit	Split a tensor into multiple sub-tensors horizontally (column-wise).
mars.tensor.vsplit	Split a tensor into multiple sub-tensors vertically (row-wise).

Tiling tensors

mars.tensor.tile	Construct a tensor by repeating A the number of times given by reps.
mars.tensor.repeat	Repeat elements of a tensor.

Adding and removing elements

mars.tensor.delete	Return a new array with sub-arrays along an axis deleted.
mars.tensor.insert	Insert values along the given axis before the given indices.
mars.tensor.append	Append values to the end of an array.
mars.tensor.unique	Find the unique elements of a tensor.

Rearranging elements

mars.tensor.flip	Reverse the order of elements in a tensor along the given axis.
mars.tensor.fliplr	Flip tensor in the left/right direction.
mars.tensor.flipud	Flip tensor in the up/down direction.
mars.tensor.reshape	Gives a new shape to a tensor without changing its data.
mars.tensor.roll	Roll tensor elements along a given axis.