create.mat

This function creates a matrix whose rows and columns depend on the
range or distance of the data and the number of strata solutions that the 
user is seeking to compute. The matrix stores the objective function values
calculated by the algorithm only to be accessed later for the purpose of
presenting the OSB.

The stratification of univariate populations under stratified sampling designs is implemented according to Khan et al. (2002) <doi:10.1177/0008068320020518> and Khan et al. (2015) <doi:10.1080/02664763.2015.1018674> in this library. It determines the Optimum Strata Boundaries (OSB) and Optimum Sample Sizes (OSS) for the study variable, y, using the best-fit frequency distribution of a survey variable (if data is available) or a hypothetical distribution (if data is not available). The method formulates the problem of determining the OSB as mathematical programming problem which is solved by using a dynamic programming technique. If a dataset of the population is available to the surveyor, the method estimates its best-fit distribution and determines the OSB and OSS under Neyman allocation directly. When the dataset is not available, stratification is made based on the assumption that the values of the study variable, y, are available as hypothetical realizations of proxy values of y from recent surveys. Thus, it requires certain distributional assumptions about the study variable. At present, it handles stratification for the populations where the study variable follows a continuous distribution, namely, Pareto, Triangular, Right-triangular, Weibull, Gamma, Exponential, Uniform, Normal, Log-normal and Cauchy distributions.

Karuna G. Reddy

stratifyR

Optimal Stratification of Univariate Populations

M. G. M. Khan

create.mat function

<dl><dt>my_env</dt>
<dd>The environment my_env has various constants stored
from earlier operations dealing with information on the data</dd></dl>

Arguments

Karuna Reddy &lt;karuna.reddy@usp.ac.fj&gt; 
MGM Khan &lt;khan_mg@usp.ac.fj&gt;

Author

To create and store calculated values of the objective function — create.mat

<dl>

<dt>my_env</dt>
<dd>The environment my_env has various constants stored
from earlier operations dealing with information on the data</dd>

</dl>

Karuna Reddy &lt;karuna.reddy@usp.ac.fj&gt; 
MGM Khan &lt;khan_mg@usp.ac.fj&gt;

create.mat: To create and store calculated values of the objective function

Description

Usage

Value

Arguments

Author