Questions tagged [beginner]

For questions which concern getting started in Data Science or any of its related subdomains.

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16
votes
3answers
4k views

How to self-learn data science? [closed]

I am a self-taught web developer and am interested in teaching myself data science, but I'm unsure of how to begin. In particular, I'm wondering: What fields are there within data science? (e.g., ...
10
votes
4answers
903 views

What initial steps should I use to make sense of large data sets, and what tools should I use?

Caveat: I am a complete beginner when it comes to machine learning, but eager to learn. I have a large dataset and I'm trying to find pattern in it. There may / may not be correlation across the data,...
23
votes
2answers
9k views

How to deal with time series which change in seasonality or other patterns?

Background I'm working on a time series data set of energy meter readings. The length of the series varies by meter - for some I have several years, others only a few months, etc. Many display ...
3
votes
6answers
1k views

Where to start, which books [closed]

What is a good book or resource to start learning Artificial Intelligence ?
4
votes
2answers
6k views

How to further improve the kaggle titanic submission accuracy?

I am working on the Titanic dataset. So far my submission has 0.78 score using soft majority voting with logistic regression and random forest. As for the features, I used Pclass, Age, SibSp, Parch, ...
10
votes
1answer
13k views

Do you have to normalize data when building decision trees using R?

So, our data set this week has 14 attributes and each column has very different values. One column has values below 1 while another column has values that go from three to four whole digits. We ...
6
votes
1answer
97 views

Mapping of categorical features into binary indicator features

I am currently reading an introductory machine learning book by Daumé (ch. 03, p. 30) and when discussing the mapping of categorical features with "n" possible values into "n" binary indicator ...
21
votes
3answers
21k views

Keyword/phrase extraction from Text using Deep Learning libraries

Perhaps this is too broad, but I am looking for references on how to use deep learning in a text summarization task. I have already implemented text summarization using standard word-frequency ...
13
votes
7answers
1k views

I am a programmer, how do I get into field of Data Science?

First of all this term sounds so obscure. Anyways..I am a software programmer. One of the languages I can code is Python. Speaking of Data I can use SQL and can do Data Scraping. What I figured out ...
57
votes
8answers
14k views

Why do internet companies prefer Java/Python for data scientist job?

I see a many times in job description for data scientist asking for Python/Java experience and disregard R. Below is a personal email I received from chief data scientist of a company I applied for ...
8
votes
2answers
598 views

Tips for a new data scientist

I am about to start a job in which I will be working with large datasets and will be expected to find trends, etc... I have found lots of resources on where to learn ML and other hard skills and feel ...
5
votes
1answer
319 views

Route to picking up Deep learning [closed]

I would like to pick up on the topic of deep learning. Should I begin from the topic of AI before working my way into Deep learning?
6
votes
1answer
261 views

Measuring Value in Data Science?

Why does it seem that it's difficult to find out how people in data science create measurable value? All I find on the internet are buzzwords like data cleaning, visualization, and writing about the ...
5
votes
2answers
544 views

Data scientist light?

Im a 26 year old guy with an MBA and I work as an ERP system administrator. I have been interested in the field of data science for a while now. I've always liked statistics and various analytical ...
2
votes
2answers
12k views

What is the difference between the training and testdata set?

What is the difference between the test and training data sets? As per blogs and papers I studied, what I understood is that we will have 100% data set that is divided into 2 sets (test data set is 30%...
-4
votes
2answers
358 views

What is most likely the bare minimum knowledge one has to have to become data scientist? [closed]

I am a Python developer but I want to become a data scientist. My Question: At its core what is the bare minimum I need to have to make this transition? I know it cannot simply be that I need to ...