How do I learn data analysis in my spare time? -Php Tutorial

Source: Internet
Author: User
I am a web front-end developer and rails programmer. I am a computer professional and have mastered Python, Ruby, C, and Java programming languages. I have a solid foundation in computer theory. I want to learn about data analysis or data mining before I work. Nowadays, the word big data is quite popular, and many companies are hiring data analysts. I also want to learn a little from the idea of "no matter how technical skills are. It may be necessary for future work. I have learned a little about it. the most basic of data analysis is to use excel to work. However, I am a web front-end developer and rails programmer. I am a computer professional. I have mastered Python, Ruby, C, and Java programming languages and have a solid foundation in computer theory.
I want to learn about data analysis or data mining before I work. Nowadays, the word big data is quite popular, and many companies are hiring data analysts.
I also want to learn a little from the idea of "no matter how technical skills are. It may be necessary for future work.

I have learned a little about it. the most basic of data analysis is to use excel to work. However, I am a computer professional and still want to learn through programming languages. I heard that the R language is good. I have a little bit of knowledge about it.
But where can I start with data analysis?
Where can we find valuable data?
Is there any open-source project in the open-source community suitable for learning data analysis?
What projects can I do by myself?

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