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Toni Cañada
Toni Cañada

45 Followers

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Jan 23

Introduction to the Travelling Salesman Problem

TSP (Travelling Salesman Problem) is a famous problem described by the following question: Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city exactly once and returns to the origin city? Despite how simple it is to…

Optimization

16 min read

Introduction to the Travelling Salesman Problem
Introduction to the Travelling Salesman Problem
Optimization

16 min read


Oct 3, 2022

The Power of Linear Programming

I love learning about computer science, lately I’ve been studying about graph theory, I even took an online course about this topic, I try to understand every concept even if it takes me longer, and I have a lemma: “If you can’t code it, you haven’t understood it”. I think…

Linear Programming

7 min read

The Power of Linear Programming
The Power of Linear Programming
Linear Programming

7 min read


Aug 20, 2022

Create an AutoCAD plugin using cSharp to compute the Shortest Path Matrix in a graph

Article’s purpose Autodesk AutoCAD is a widely known program by engineers and designers used to create 2D and 3D models, it has a great interface with lots of options. It’s an intuitive easy-to-learn software which allows the user to achive great results fastly. CAD stands for Computed-Aided-Design, and Auto for Autodesk. …

Autocad

9 min read

Create an AutoCAD plugin using cSharp to compute the Shortest Path Matrix in a graph
Create an AutoCAD plugin using cSharp to compute the Shortest Path Matrix in a graph
Autocad

9 min read


Jul 12, 2022

Regression data analysis

Regression is one of the most important statistical technique ever, almost every data analysis uses this method in some way. In a descriptive way, regression is used to see correlations in the data, but correlation doesn’t imply always causality, as we can see in this web. In this article we…

Data Analysis

7 min read

Regression data analysis
Regression data analysis
Data Analysis

7 min read


Apr 11, 2022

Understanding Central Limit Theorem and t-test

When I first heard about inferential statistics I was amazed by that topic, How can we take conclusions about the population with just samples of it? In some way it sounds like magic. Then someone taught me about the Central Limit Theorem and how to compare means with the t-test…

Statistics

8 min read

Understanding Central Limit Theorem and t-test
Understanding Central Limit Theorem and t-test
Statistics

8 min read


Jan 15, 2022

Brute-force code for Isomorphisms

The purpose of this article is to use python code to explain concepts about isomorphism between graphs and related ideas such as automorphisms, cycle notation, vertex-transitive, and edge-transitive graphs. It’s important to mention that the presented algorithms are highly inefficient, this is related to the graph isomorphism problem, not yet…

Graph Theory

5 min read

Brute-force code for Isomorphisms
Brute-force code for Isomorphisms
Graph Theory

5 min read


Sep 26, 2021

Oloid surface

An oloid is a three-dimensional curved geometric object that was discovered by Paul Schatz in 1929. It’s a ruled surface, the convex hull of a skeletal frame made by placing two linked congruent circles in perpendicular planes, so that the center of each circle lies on the edge of the…

Mathematics

3 min read

Oloid surface
Oloid surface
Mathematics

3 min read


May 30, 2021

API calls from Excel

How to make API calls from Excel and transform JSON response to a table. — Nobody can deny that Microsoft Excel is still a powerful tool even if you know Python, SQL, Javascript… It provides a super-friendly interface, has many functionalities and is a very popular software. On the other hand, being able to make API calls and process the response provides a new world…

Excel

3 min read

API calls from Excel
API calls from Excel
Excel

3 min read


Apr 17, 2021

How to manage your companies for free with ERPNext

ERPNext is the world’s best free and open source ERP. It’s easy to install and can be adapted to the needs of any kind of business in any country. — This opensource app can be easily setup for multiple companies, where each one has their own site and SQL database. It allows the creation of users with different permission roles. Some of other incredible features are: Automatic email predefined reports, API access, backups, integration with PayPal, Stripe, Shopify among others…

Open Source

6 min read

How to manage your companies for free with ERPNext
How to manage your companies for free with ERPNext
Open Source

6 min read


Feb 23, 2021

Convertir documentos del SII (Chile), de XML a PDF

Usar Python para parsear documentos XML del SII y transformarlos a formato pdf, incluyendo el código de barras. — El Servicio de Impuestos Internos de Chile (SII) funciona mediante archivos XML. Es decir, todos los documentos (facturas, guías de despacho, notas de crédito, etc) son en realidad archivos XML. Estos XML llegan a un email que cada empresa designa, también se pueden bajar desde el portal web del SII…

Xml

5 min read

Convertir documentos del SII (Chile), de XML a PDF
Convertir documentos del SII (Chile), de XML a PDF
Xml

5 min read

Toni Cañada

Toni Cañada

45 Followers

Civil engineer passionate about business administration and coding.

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