Programming | Aptech

Aug 27 by aptech Posted in Programming

Understanding Errors: G0058 Index out-of-Range

Today we will help you to understand and resolve Error G0058 Index Out-of-Range We will :

Explain the cause of the index out-of-range error in GAUSS.
Explain why performing index assignments past the end of your data can lead to bad outcomes.
Show how to use some functions and operators that can assist with diagnosing and resolving this error.
Work through an example to resolve an indexing problem.

Aug 20 by Eric Posted in Econometrics, Programming

Introduction to Handling Missing Values

Handling missing values is an important step in data cleaning that can impact model validity and reliability. Despite this, it can be difficult to find examples and resources about how to deal with missing values. This blog helps to fill that void and covers:

Types of missing values.
Dealing with missing values.
Missing values in practice.

Jul 26 by aptech Posted in Programming

Understanding Errors: G0064 Operand Missing

Today we will help you to understand and resolve Error G0064: Operand Missing. We will answer the questions:

What is an operand?
How do common mathematical and non-mathematical operators interact with operands?
What are common causes of operand missing errors?

Tagged in errors, operand

Jun 18 by Eric Posted in Econometrics, Programming, Time Series

Dates and Times Made Easy

Working with dates in data analysis software can be tedious and error-prone. The new GAUSS date type, introduced in GAUSS 21, can save you time and prevent frustration and errors. The date data type is part of the GAUSS dataframe alongside the category, string, and numeric type. In this blog, we will explore the advantages the date type has to offer, including:

Loading and viewing dates side-by-side with other data types.
Viewing and displaying dates in easy-to-read formats.
Easily changing the date format.
Using familiar date formats for filtering data.

May 21 by Eric Posted in Programming

What is a GAUSS Dataframe and Why Should You Care?

The GAUSS dataframe, introduced in GAUSS 21, is a powerful tool for storing data. In today’s blog, we explain what a GAUSS dataframe is and discuss the advantages of making it a part of your everyday GAUSS use.

Apr 23 by aptech Posted in Programming

Understanding Errors | G0025 : Undefined symbol

Today we will help you to understand and resolve Error G0025: Undefined symbol We will answer the questions:

What is a GAUSS symbol
What are the most common types of GAUSS symbols?
How do I define a GAUSS symbol?
How do I resolve the error `G0025: Undefined symbol`?

Tagged in errors, undefined symbol

Mar 19 by Eric Posted in Econometrics, Programming, User Interface

Easy Management of Categorical Variables

Categorical variables offer an important opportunity to capture qualitative effects in statistical modeling. Unfortunately, it can be tedious and cumbersome to manage categorical variables in statistical software. The new GAUSS category type, introduced in GAUSS 21, makes it easy and intuitive to work with categorical data. In today’s blog we use real-life housing data to explore the numerous advantages of the GAUSS category type including:

Easy set up and viewing of categorical data.
Simple renaming of category labels.
Easy changing of the reference base case and reordering of categories.
Single-line frequency plots and tables.
Internal creation of dummy variables for regressions.
Proper labeling of categories in regression output.

Tagged in categorical data, categorical variables

Oct 15 by Eric Posted in Econometrics, Programming

Maximum Likelihood Estimation in GAUSS

Maximum likelihood is a fundamental workhorse for estimating model parameters with applications ranging from simple linear regression to advanced discrete choice models. Today we learn how to perform maximum likelihood estimation with the GAUSS Maximum Likelihood MT library using our simple linear regression example. We’ll show all the fundamentals you need to get started with maximum likelihood estimation in GAUSS including:

How to create a likelihood function.
How to call the maxlikmt procedure to estimate parameters.
How to interpret the results from maxlikmt.

Tagged in maximum likelihood, programming

Sep 21 by Eric Posted in Econometrics, Programming

Beginner's Guide To Maximum Likelihood Estimation

Maximum likelihood is a widely used technique for estimation with applications in many areas including time series modeling, panel data, discrete data, and even machine learning. In today’s blog, we cover the fundamentals of maximum likelihood including:

The basic theory of maximum likelihood.
The advantages and disadvantages of maximum likelihood estimation.
The log-likelihood function.
Modeling applications.

Jul 17 by aptech Posted in Best Practices, Programming

Basics of GAUSS Procedures

GAUSS procedures are user-defined functions that allow you to combine a sequence of commands to perform desired tasks. In this blog, you will learn the fundamentals of creating and using procedures in GAUSS.

Category: Programming