# H/params.h File Reference

Several functions to obtain (pre)scaled energy parameter data containers. More...

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## Functions

paramT * | scale_parameters (void)
| Get precomputed energy contributions for all the known loop types.
paramT * | get_scaled_parameters (double temperature, model_detailsT md)
| Get precomputed energy contributions for all the known loop types.
pf_paramT * | get_scaled_pf_parameters (void)
| get a datastructure of type pf_paramT which contains the Boltzmann weights of several energy parameters scaled according to the current temperature
pf_paramT * | get_boltzmann_factors (double temperature, double betaScale, model_detailsT md, double pf_scale)
| Get precomputed Boltzmann factors of the loop type dependent energy contributions with independent thermodynamic temperature.
pf_paramT * | get_boltzmann_factor_copy (pf_paramT *parameters)
| Get a copy of already precomputed Boltzmann factors.
pf_paramT * | get_scaled_alipf_parameters (unsigned int n_seq)
| Get precomputed Boltzmann factors of the loop type dependent energy contributions (alifold variant).
pf_paramT * | get_boltzmann_factors_ali (unsigned int n_seq, double temperature, double betaScale, model_detailsT md, double pf_scale)
| Get precomputed Boltzmann factors of the loop type dependent energy contributions (alifold variant) with independent thermodynamic temperature.

## Detailed Description

Several functions to obtain (pre)scaled energy parameter data containers.

## Function Documentation

paramT* scale_parameters | ( | void |  | ) |

Get precomputed energy contributions for all the known loop types.

Note:
  OpenMP: This function relies on several global model settings variables and thus is not to be considered threadsafe. See get_scaled_parameters() for a completely threadsafe implementation.

Returns:
  A set of precomputed energy contributions

paramT* get_scaled_parameters | ( | double | temperature,
|  | model_detailsT | md |
| ) |  |  |

Get precomputed energy contributions for all the known loop types.

Call this function to retrieve precomputed energy contributions, i.e. scaled according to the temperature passed. Furthermore, this function assumes a data structure that contains the model details as well, such that subsequent folding recursions are able to retrieve the correct model settings

See also:
  model_detailsT, set_model_details()

Parameters:

  temperature

  The temperature in degrees Celcius
  Parameters:

    md

    The model details
    Returns:
      precomputed energy contributions and model settings

pf_paramT* get_scaled_pf_parameters | ( | void |  | ) |

get a datastructure of type pf_paramT which contains the Boltzmann weights of several energy parameters scaled according to the current temperature

Returns:
  The datastructure containing Boltzmann weights for use in partition function calculations

pf_paramT* get_boltzmann_factors | ( | double | temperature,
|  | double | betaScale,
|  | model_detailsT | md,
|  | double | pf_scale |
| ) |  |  |

Get precomputed Boltzmann factors of the loop type dependent energy contributions with independent thermodynamic temperature.

This function returns a data structure that contains all necessary precalculated Boltzmann factors for each loop type contribution.
In contrast to get_scaled_pf_parameters(), this function enables setting of independent temperatures for both, the individual energy contributions as well as the thermodynamic temperature used in

See also:
  get_scaled_pf_parameters(), get_boltzmann_factor_copy()

Parameters:

  dangle_model

  The dangle model to be used (possible values: 0 or 2)
  Parameters:

    temperature

    The temperature in degC used for (re-)scaling the energy contributions
    Parameters:

      alpha

      A scaling value that is used as a multiplication factor for the absolute temperature of the system
      Returns:
        A set of precomputed Boltzmann factors

pf_paramT* get_boltzmann_factor_copy | ( | pf_paramT * | parameters | ) |

Get a copy of already precomputed Boltzmann factors.

See also:
  get_boltzmann_factors(), get_scaled_pf_parameters()

Parameters:

  parameters

  The input data structure that shall be copied
  Returns:
    A copy of the provided Boltzmann factor dataset

pf_paramT* get_scaled_alipf_parameters | ( | unsigned int | n_seq | ) |

Get precomputed Boltzmann factors of the loop type dependent energy contributions (alifold variant).

pf_paramT* get_boltzmann_factors_ali | ( | unsigned int | n_seq,
|  | double | temperature,
|  | double | betaScale,
|  | model_detailsT | md,
|  | double | pf_scale |
| ) |  |  |

Get precomputed Boltzmann factors of the loop type dependent energy contributions (alifold variant) with independent thermodynamic temperature.