NDK_GLM_PARAM

Returns an array of cells for the initial (non-optimal), optimal or standard errors of the model's parameters.

Returns

status code of the operation

Return values

NDK_SUCCESS	Operation successful
NDK_FAILED	Operation unsuccessful. See Macros for full list.

Parameters

[in]	Y	is the response or the dependent variable data array (one dimensional array)
[in]	nSize	is the number of observations
[in]	X	is the independent variables data matrix, such that each column represents one variable
[in]	nVars	is the number of independent variables (or columns in X)
[in,out]	betas	are the coefficients of the GLM model (a one dimensional array)
[in]	nBetas	is the number of the coefficients in betas. Note that nBetas must be equal to nVars+1
[in,out]	phi	is the GLM dispersion parameter. Phi is only meaningful for Binomial (1/batch or trial size) and for Gaussian (variance). Binomial : phi = Reciprocal of the batch/trial size. Gaussian : phi = variance. Poisson : phi = 1.0
[in]	Lvk	is the link function that describes how the mean depends on the linear predictor (see GLM_LINK_FUNC). Identity (default) Log Logit Probit Complementary log-log
[in]	retType	is a switch to select the type of value returned: 1= Quick Guess, 2=Calibrated, 3= Std. Errors ( see MODEL_RETVAL_FUNC)
[in]	maxIter	is the maximum number of iterations used to calibrate the model. If missing, the default maximum of 100 is assumed.

Remarks

1. The underlying model is described here.
2. GLM_GUESS returns an array of size equal number of betas plus one (Phi).
3. The number of rows in response variable (Y) must be equal to number of rows of the explanatory variables (X).
4. For GLM with Poisson distribution,
   • The values of response variable must be non-negative integers.
   • The value of the dispersion factor (Phi) must be either missing or equal to one.
5. For GLM with Binomial distribution,
   • The values of the response variable must be non-negative fractions between zero and one, inclusive.
   • The value of the dispersion factor (Phi) must be a positive fraction (greater than zero, and less than one).
6. For GLM with Gaussian distribution, the dispersion factor (Phi) value must be either missing or positive.

Requirements

Header	SFSDK.H
Library	SFSDK.LIB
DLL	SFSDK.DLL