181 lines
7.9 KiB
Plaintext
181 lines
7.9 KiB
Plaintext
---
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title: UnivariateDistribution
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description: API reference for qiskit.aqua.components.uncertainty_models.UnivariateDistribution
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.aqua.components.uncertainty_models.UnivariateDistribution
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---
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# UnivariateDistribution
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<Class id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-aqua/tree/stable/0.9/qiskit/aqua/components/uncertainty_models/univariate_distribution.py" signature="UnivariateDistribution(num_target_qubits, probabilities=None, low=0, high=1)" modifiers="class">
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Bases: `qiskit.aqua.components.uncertainty_models.uncertainty_model.UncertaintyModel`, `abc.ABC`
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This module contains the definition of a base class for univariate distributions. (Interface for discrete bounded uncertainty models assuming an equidistant grid)
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**Parameters**
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* **num\_target\_qubits** (`int`) – Number of qubits it acts on, has a min. value of 1.
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* **probabilities** (`Union`\[`List`\[`float`], `ndarray`, `None`]) – Probabilities for different states
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* **low** (`float`) – Lower bound, i.e., the value corresponding to |0…0> (assuming an equidistant grid)
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* **high** (`float`) – Upper bound, i.e., the value corresponding to |1…1> (assuming an equidistant grid)
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**Raises**
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[**AquaError**](qiskit.aqua.AquaError "qiskit.aqua.AquaError") – num qubits and length of probabilities vector do not match
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## Methods
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### build
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build" signature="UnivariateDistribution.build(qc, q, q_ancillas=None, params=None)" />
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### build\_controlled
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_controlled" signature="UnivariateDistribution.build_controlled(qc, q, q_control, q_ancillas=None, use_basis_gates=True)">
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Adds corresponding controlled sub-circuit to given circuit
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**Parameters**
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* **qc** ([*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")) – quantum circuit
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* **q** (*list*) – list of qubits (has to be same length as self.\_num\_qubits)
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* **q\_control** ([*Qubit*](qiskit.circuit.Qubit "qiskit.circuit.Qubit")) – control qubit
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* **q\_ancillas** (*list*) – list of ancilla qubits (or None if none needed)
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* **use\_basis\_gates** (*bool*) – use basis gates for expansion of controlled circuit
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</Function>
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### build\_controlled\_inverse
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_controlled_inverse" signature="UnivariateDistribution.build_controlled_inverse(qc, q, q_control, q_ancillas=None, use_basis_gates=True)">
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Adds controlled inverse of corresponding sub-circuit to given circuit
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**Parameters**
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* **qc** ([*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")) – quantum circuit
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* **q** (*list*) – list of qubits (has to be same length as self.\_num\_qubits)
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* **q\_control** ([*Qubit*](qiskit.circuit.Qubit "qiskit.circuit.Qubit")) – control qubit
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* **q\_ancillas** (*list*) – list of ancilla qubits (or None if none needed)
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* **use\_basis\_gates** (*bool*) – use basis gates for expansion of controlled circuit
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</Function>
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### build\_controlled\_inverse\_power
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_controlled_inverse_power" signature="UnivariateDistribution.build_controlled_inverse_power(qc, q, q_control, power, q_ancillas=None, use_basis_gates=True)">
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Adds controlled, inverse, power of corresponding circuit. May be overridden if a more efficient implementation is possible
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</Function>
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### build\_controlled\_power
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_controlled_power" signature="UnivariateDistribution.build_controlled_power(qc, q, q_control, power, q_ancillas=None, use_basis_gates=True)">
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Adds controlled power of corresponding circuit. May be overridden if a more efficient implementation is possible
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</Function>
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### build\_inverse
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_inverse" signature="UnivariateDistribution.build_inverse(qc, q, q_ancillas=None)">
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Adds inverse of corresponding sub-circuit to given circuit
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**Parameters**
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* **qc** ([*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")) – quantum circuit
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* **q** (*list*) – list of qubits (has to be same length as self.\_num\_qubits)
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* **q\_ancillas** (*list*) – list of ancilla qubits (or None if none needed)
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</Function>
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### build\_inverse\_power
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_inverse_power" signature="UnivariateDistribution.build_inverse_power(qc, q, power, q_ancillas=None)">
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Adds inverse power of corresponding circuit. May be overridden if a more efficient implementation is possible
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</Function>
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### build\_power
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.build_power" signature="UnivariateDistribution.build_power(qc, q, power, q_ancillas=None)">
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Adds power of corresponding circuit. May be overridden if a more efficient implementation is possible
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</Function>
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### get\_num\_qubits
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.get_num_qubits" signature="UnivariateDistribution.get_num_qubits()">
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returns number of qubits
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</Function>
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### get\_num\_qubits\_controlled
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.get_num_qubits_controlled" signature="UnivariateDistribution.get_num_qubits_controlled()">
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returns number of qubits controlled
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</Function>
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### pdf\_to\_probabilities
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.pdf_to_probabilities" signature="UnivariateDistribution.pdf_to_probabilities(pdf, low, high, num_values)" modifiers="static">
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Takes a probability density function (pdf), and returns a truncated and discretized array of probabilities corresponding to it
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**Parameters**
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* **pdf** (*function*) – probability density function
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* **low** (*float*) – lower bound of equidistant grid
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* **high** (*float*) – upper bound of equidistant grid
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* **num\_values** (*int*) – number of grid points
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**Returns**
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array of probabilities
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**Return type**
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list
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</Function>
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### required\_ancillas
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.required_ancillas" signature="UnivariateDistribution.required_ancillas()">
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returns required ancillas
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</Function>
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### required\_ancillas\_controlled
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<Function id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.required_ancillas_controlled" signature="UnivariateDistribution.required_ancillas_controlled()">
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returns required ancillas controlled
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</Function>
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## Attributes
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### high
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<Attribute id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.high">
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returns high
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</Attribute>
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### low
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<Attribute id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.low">
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returns low
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</Attribute>
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### num\_target\_qubits
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<Attribute id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.num_target_qubits">
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Returns the number of target qubits
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</Attribute>
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### num\_values
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<Attribute id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.num_values">
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returns number of values
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</Attribute>
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### probabilities
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<Attribute id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.probabilities">
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returns probabilities
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</Attribute>
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### values
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<Attribute id="qiskit.aqua.components.uncertainty_models.UnivariateDistribution.values">
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returns values
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</Attribute>
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</Class>
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