constant_stf

Graph.constant_stf(constant, batch_dimension_count=0)

Create a constant sampleable tensor-valued function of time.

Parameters

• constant (number or np.ndarray or Tensor) – The constant value $c$ of the function. To create a batch of $B_1 \times \ldots \times B_n$ constant functions of shape $D_1 \times \ldots \times D_m$, provide this constant parameter as an object of shape $B_1\times\ldots\times B_n\times D_1\times\ldots\times D_m$.
• batch_dimension_count (int , optional) – The number of batch dimensions, $n$, in constant. If provided, the first $n$ dimensions of constant are considered batch dimensions. Defaults to 0, which corresponds to no batch.

Returns

An Stf representing the constant function $f(t) = c$ for all time $t$ (or a batch of functions, if you provide batch_dimension_count).

Return type

Stf

SEE ALSO

Graph.constant_pwc : Corresponding operation for Pwcs.

Graph.constant_stf_operator : Create a constant sampleable function from operators.

Graph.identity_stf : Create an Stf representing the identity function.

Notes

For more information on Stf nodes see the Working with time-dependent functions in Boulder Opal topic.