# Nigiara: web guide

**Nigiara is a web guide**. On this site you can find a collection of tips, tutorials and guides that allow you to solve the small difficulties online, while browsing websites or social networks. On this site you can also find a set of useful resources to improve your online browsing experience.

## How to use Octave

In this guide, I will introduce you to Octave, a free alternative to Matlab. Octave is an interactive programming language that allows for complex mathematical calculations and solutions to geometric problems. It is available for various operating systems such as Windows, MacOS, and Linux.

Octave offers a wide range of functions, including numerical optimization, signal processing, linear algebra, and statistical analysis. It is a great choice for engineers, scientists, and mathematicians who need to solve complex problems.

## Guide to Using MATLAB

In this guide, I will explain how to use MATLAB, a numerical computation and programming environment developed by MathWorks. MATLAB is an extremely versatile tool that allows you to process numerical data, perform mathematical calculations, and create graphs. It is widely utilized in academic, scientific, and engineering fields to solve problems in various domains such as mathematics, physics, biology, finance, and engineering.

Moreover, MATLAB offers an extensive range of functionalities and tools, including matrix manipulation, graph and chart creation, custom algorithm programming, and communication with other programs. In fact, it is one of the most popular tools for visualizing and analyzing numerical data.

## How to make a matrix in Geogebra

In this lesson you will learn how to create a matrix in geogebra.

## How to program in Java

In these online lessons I'll explain how to develop a program in the Java language.

## How to calculate the determinant of matrix in Geogebra

xIn this tutorial we learn how to calculate the determinant of square matrices.

## How to write infinity on Geogebra

In this lesson I'll explain how to use the infinity symbol in Geogebra calculations.

## How to do an inverse matrix in Geogebra

In this lesson I'll explain how to calculate an inverse matrix using Geogebra.

## How to calculate rank of a matrix

In this tutorial I'll explain how to calculate the rank of a matrix in Geogebra.

## How to transpose a matrix in Geogebra

In this lesson you will learn how to transpose to a square or rectangular matrix.

## How to calculate the limit of a function in Geogebra

## How to find limit of the function in Octave

How to calculate the limit of a function in Octave with some practical examples

## How to find the derivative of the function in Octave

If this Nigiara online lesson I'll explain how to calculate the first or second derivative of a function.

## How to use Whatsapp

All the guides, tricks and tutorials to learn how to use Whatsapp and solve any problem on the instant messenger.

## How to install Telegram

How to install the Telegram application on an Android device.