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Chi-squared distribution
MathQuantileChiSquare

MathQuantileChiSquare

MathQuantileChiSquare

For the specified probability, the function calculates the value of inverse chi-squared distribution function. In case of error it returns NaN.

double  MathQuantileChiSquare(
   const double  probability,    // probability value of random variable occurrence
   const double  nu,             // parameter of distribution (number of degrees of freedom)
   const bool    tail,           // flag of calculation, if false, then calculation is performed for 1.0-probability
   const bool    log_mode,       // flag of calculation, if log_mode=true, calculation is performed for Exp(probability)
   int&          error_code      // variable to store the error code
   );

For the specified probability, the function calculates the value of inverse chi-squared distribution function. In case of error it returns NaN.

double  MathQuantileChiSquare(
   const double  probability,    // probability value of random variable occurrence
   const double  nu,             // parameter of distribution (number of degrees of freedom)
   int&          error_code      // variable to store the error code
   );

For the specified probability[] array of probability values, the function calculates the value of inverse chi-squared distribution function. In case of error it returns false. Analog of the qchisq() in R.

double  MathQuantileChiSquare(
   const double& probability[],  // array with probability values of random variable
   const double  nu,             // parameter of distribution (number of degrees of freedom)
   const bool    tail,           // flag of calculation, if false, then calculation is performed for 1.0-probability
   const bool    log_mode,       // flag of calculation, if log_mode=true, calculation is performed for Exp(probability)
   double&       result[]        // array with values of quantiles
   );

For the specified probability[] array of probability values, the function calculates the value of inverse chi-squared distribution function. In case of error it returns false.

bool  MathQuantileChiSquare(
   const double& probability[],  // array with probability values of random variable
   const double  nu,             // parameter of distribution (number of degrees of freedom)
   double&       result[]        // array with values of quantiles
   );

Parameters

probability

[in] Probability value of random variable.

probability[]

[in] Array with probability values of random variable.

nu

[in] Parameter of distribution (number of degrees of freedom).

tail

[in] Flag of calculation, if false, then calculation is performed for 1.0-probability.

log_mode

[in] Flag of calculation, if log_mode=true, calculation is performed for Exp(probability).

error_code

[out] Variable to get the error code.

result[]

[out] Array with values of quantiles.

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