April 2025
Intermediate to advanced
328 pages
8h 42m
Portuguese (Portugal, Brazil)
Content preview from Álgebra linear prática para a ciência dos dados
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Capítulo 3. Vetores, Parte 2
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
O capítulo anterior lançou as bases para a compreensão de vectores e das operações básicas que actuam sobre vectores. Agora vais alargar os horizontes dos teus conhecimentos de álgebra linear, aprendendo um conjunto de conceitos inter-relacionados, incluindo independência linear, subespaços e bases. Cada um destes tópicos é crucialmente importante para compreenderes as operações sobre matrizes.
Alguns dos tópicos aqui apresentados podem parecer abstractos e desligados das aplicações, mas existe um caminho muito curto entre eles, por exemplo, subespaços vectoriais e ajuste de modelos estatísticos aos dados. As aplicações da ciência dos dados vêm mais tarde, por isso, continua a concentrar-te nos fundamentos para que os tópicos avançados sejam mais fáceis de compreender.
Conjuntos de vectores
Podemos começar o capítulo com algo fácil: uma coleção de vectores chama-se um conjunto. Imagina colocar um conjunto de vectores num saco para transportar. Os conjuntos de vectores são indicados com letras maiúsculas e itálicas, como S ou V. Matematicamente, podemos descrever os conjuntos da seguinte forma:
Imagina, por exemplo, um conjunto de dados sobre o número de casos positivos de Covid-19, hospitalizações e mortes em cem países; poderias armazenar os dados de cada país num vetor de três elementos e criar ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.