Unit Conversion

Functions to convert between various physical units

Enums

enum vrna_unit_energy_e

Energy / Work Units.

Values:

enumerator VRNA_UNIT_J

Joule ( 1 J=1 kgm2s2 )

enumerator VRNA_UNIT_KJ

Kilojoule ( 1 kJ=1,000 J )

enumerator VRNA_UNIT_CAL_IT

Calorie (International (Steam) Table, 1 calIT=4.1868 J )

enumerator VRNA_UNIT_DACAL_IT

Decacolorie (International (Steam) Table, 1 dacalIT=10 calIT=41.868 J )

enumerator VRNA_UNIT_KCAL_IT

Kilocalorie (International (Steam) Table, 1 kcalIT=4.1868 kJ )

enumerator VRNA_UNIT_CAL

Calorie (Thermochemical, 1 calth=4.184 J )

enumerator VRNA_UNIT_DACAL

Decacalorie (Thermochemical, 1 dacalth=10 calth=41.84 J )

enumerator VRNA_UNIT_KCAL

Kilocalorie (Thermochemical, 1 kcalth=4.184 kJ )

enumerator VRNA_UNIT_G_TNT

g TNT ( 1 g TNT=1,000 calth=4,184 J )

enumerator VRNA_UNIT_KG_TNT

kg TNT ( 1 kg TNT=1,000 kcalth=4,184 kJ )

enumerator VRNA_UNIT_T_TNT

ton TNT ( 1 t TNT=1,000,000 kcalth=4,184 MJ )

enumerator VRNA_UNIT_EV

Electronvolt ( 1 eV=1.602176565×1019 J )

enumerator VRNA_UNIT_WH

Watt hour ( 1 Wh=1 W3,600s=3,600 J=3.6 kJ )

enumerator VRNA_UNIT_KWH

Kilowatt hour ( 1 kWh=1 kW3,600 s=3,600 kJ=3.6 MJ )

enum vrna_unit_temperature_e

Temperature Units.

Values:

enumerator VRNA_UNIT_K

Kelvin (K)

enumerator VRNA_UNIT_DEG_C

Degree Celcius (C) ( [C]=[K]273.15 )

enumerator VRNA_UNIT_DEG_F

Degree Fahrenheit (F) ( [F]=[K]×95459.67 )

enumerator VRNA_UNIT_DEG_R

Degree Rankine (R) ( [R]=[K]×95 )

enumerator VRNA_UNIT_DEG_N

Degree Newton (N) ( [N]=([K]273.15)×33100 )

enumerator VRNA_UNIT_DEG_DE

Degree Delisle (De) ( [De]=(373.15[K])×32 )

enumerator VRNA_UNIT_DEG_RE

Degree Raumur (R) ( [Re´]=([K]273.15)×45 )

enumerator VRNA_UNIT_DEG_RO

Degree Rmer (R) ( [R{\o}]=([K]273.15)×2140+7.5 )

Functions

double vrna_convert_energy(double energy, vrna_unit_energy_e from, vrna_unit_energy_e to)
#include <ViennaRNA/utils/units.h>

Convert between energy / work units.

Parameters
  • energy – Input energy value

  • from – Input unit

  • to – Output unit

Returns

Energy value in Output unit

double vrna_convert_temperature(double temp, vrna_unit_temperature_e from, vrna_unit_temperature_e to)
#include <ViennaRNA/utils/units.h>

Convert between temperature units.

Parameters
  • temp – Input temperature value

  • from – Input unit

  • to – Output unit

Returns

Temperature value in Output unit

int vrna_convert_kcal_to_dcal(double energy)
#include <ViennaRNA/utils/units.h>

Convert floating point energy value into integer representation.

This function converts a floating point value in kcal/mol into its corresponding deka-cal/mol integer representation as used throughout RNAlib.

Parameters
  • energy – The energy value in kcal/mol

Returns

The energy value in deka-cal/mol

double vrna_convert_dcal_to_kcal(int energy)
#include <ViennaRNA/utils/units.h>

Convert an integer representation of free energy in deka-cal/mol to kcal/mol.

This function converts a free energy value given as integer in deka-cal/mol into the corresponding floating point number in kcal/mol

Parameters
  • energy – The energy in deka-cal/mol

Returns

The energy in kcal/mol