Questions tagged [beginner]

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

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1answer
45 views

Please suggest some simple functions that I can use to test my neural network implementation

I am a beginner and I have developed code in Octave to train a neural network (as part of Andrew Ng's coursera course). Now I would like to generate some datasets in Excel for simple mathematical ...
2
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0answers
128 views

Which is the most appropiate algorithm to use with Mlib for predicting prices [closed]

I am reading the docs of MLlib, but I am new with it and I don't know which would be the best algorithm to predict prices. I have seen that with RandomRDDs I can use a generator for random numbers ...
2
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0answers
104 views

Jobs for gaining experience in preperation for data science [closed]

Data Scientist positions are not the most common entry level jobs. They require hard work, knowledge and most of all experience. The problem is, I am uncertain what entry level jobs can help you get ...
17
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5answers
19k views

Open source data science projects to contribute

Contribution into open source projects is typically a good way to get some practice for newbies, and try a new area for experienced data scientists and analysts. Which projects do you contribute? ...
1
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2answers
613 views

How can one can aim for a career in machine learning? [closed]

I'm interested in various machine learning methods and wonder how can I aim for a career in the field. What are most basic skills to have? I mean the matters strictly connected to the machine ...
16
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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., ...
0
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1answer
97 views

Should i pick this as a career? [closed]

I'm mainly interested in creative things, but also interested in the science behind viewership and marketing a piece of media. Think about having a stable career in data science, where do you think I ...
6
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3answers
300 views

Distance calculation/vector range significance

I'm trying to implement item based collaborative filtering. Do any distance calculations allow for weighting of certain ranges of values within each vector? For example, I would like to be able to ...
15
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2answers
9k views

Data science without knowledge of a specific topic, is it worth pursuing as a career? [closed]

I had a conversation with someone recently and mentioned my interest in data analysis and who I intended to learn the necessary skills and tools. They suggested to me that while it is great to learn ...
1
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2answers
153 views

Neural network, Support Vector Machine or something else to classify into 7 groups

I'm an experienced developer but I'm only starting to discover data science. I have a data set consisting of 62 parameters for each row and each row in that data set belongs to one of 7 groups (...
4
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4answers
521 views

Reference about social network data-mining

I am not in the data science field, but I would like to examine in depth this field and, particularly, I would like to start from the analysis of the social networks data. I am trying to find some ...
-1
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1answer
138 views

Beggining in machine learning [closed]

I just want to know which books, courses,videos, links,etc do you recommend me to start in machine learning, neural networks, languajes most commonly used. I want to start from zero, just in the ...
3
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1answer
291 views

What are the best sites to display your data science skills & projects? [closed]

What are the best sites to display your data science skills & projects? Obviously there's kaggle, but any others that recruiters look at?
2
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1answer
835 views

Correctly interpreting Cosine Angular Distance Similarity & Euclidean Distance Similarity

As an example, let's say I have a very simple data set. I am given a csv with three columns, user_id, book_id, rating. The rating can be any number 0-5, where 0 means the user has NOT rated the book. ...
1
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1answer
182 views

Fittting histograms with combination of an unknown number of Gaussians

I have many data in the form of one dimensional histogram, to give an example consider the data at http://pastebin.com/embed_js.php?i=1mNRuEHZ I expect that these data are obtained from a pdf ...
4
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2answers
1k views

Cheat Sheet of UNIX commands for Data Science [closed]

I was looking for a cheat sheet of UNIX commands, which are specifically usable for data science. I mean an introduction to very basic commands (starting from cd, <...
0
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1answer
29 views

How does the test data gets collected?

I'm learning the linear regression now. I used R to build linear model upon a set of train model and try to predict() data based on the test data. My question: I understand how train data gets ...
8
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4answers
1k views

Online machine learning tutorial

Does anyone know some good tutorials on online machine learning technics? I.e. how it can be used in real-time environments, what are key differences compared to normal machine learning methods etc. ...
1
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1answer
30 views

Compute utility of a notification

I have no idea whether this is the right StackExchange flavor to post this question in, but here goes: I have an agent (an IRC bot that listens to an event stream) that I would like to add "...
0
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1answer
149 views

Ideas for next step of Machine Learning [closed]

I have completely followed the machine learning course on coursera Machine Learning by professor Andrew Ng Now I want to put my knowledge to action. Some ideas that I have include : -Voice ...
4
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1answer
317 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?
2
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1answer
4k views

What is the best way to scale a numerical dataset [closed]

I have a dataset with differents attributes which don't have the same range on their values which is a problem when we need to compute distance beetween objects. After some research i found that i can ...
5
votes
3answers
913 views

Recommendation - item based vs user based [closed]

I have one clarification - First the definitions- User-based: Recommend items by finding similar users. This is often harder to scale because of the dynamic nature of users. Item-based: Calculate ...
10
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1answer
12k 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 ...
2
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6answers
8k views

How much of a background in programming is necessary to become a data scientist? [closed]

I once knew some Java, but that was close to 10 years ago. Assuming I can learn a language to get into data analytics.... what language do you recommend?
0
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2answers
349 views

Data transposition code in R

I've been working in SAS for a few years but as my time as a student with a no-cost-to-me license comes to an end, I want to learn R. Is it possible to transpose a data set so that all the ...
1
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0answers
206 views

Hadoop/Pig Aggregate Data

I am working on a project with two data sets. A time vs. speed data set (let's call it traffic), and a time vs. weather data set (called weather). I am looking to find a correlation between these ...
1
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1answer
2k views

K-Means clustering for mixed numeric and categorical data implementation in C#

I am a research scholar in data mining. I'm interested in C# implementation of K-Means clustering algorithm for mixed numeric and categorical data.
8
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1answer
569 views

Some suggestion for career in data science or predictive modeling

I am looking to choose my career in the area of decision science or predictive modeling and I am aware that this is kind of opinion based but I would like to have some suggestion from experts that I ...
3
votes
1answer
5k views

R aggregate() with dates

I am working on a data set that has multiple traffic speed measurements per day. My data is from the city of chicago, and it is taken every minute for about six months. I wanted to consolidate this ...
3
votes
1answer
220 views

Avoid iterations while calculating average model accuracy

I am fitting a model in R. use createFolds method to create several k folds from the data set loop through the folds, repeating ...

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