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Data Science

Launched Q&A site for data Science professionals, Machine Learning specialists, and those interested in learning more about the field.

54 Example Questions

active newest votes
up vote 29 down vote
What books are recommended for a newbie data scientist?
added by zkan Oct 27 '13 at 4:11
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Good question. If I had any more upvotes I would upvote this. Some of my favourites are: Data Analysis with Open Source Tools . The Bad Data Handbook and Foundations of Machine Learning. –  aaa Oct 27 '13 at 4:27
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Each question needs only 10 upvotes. Beyond that, the votes are essentially wasted and could be better used in some other question needing more votes. – Victor Stafusa Feb 9 '14 at 6:07
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As Victor says, if you can, remove your vote to this question, and give it to a question which vote is less than 10. This stackexchange is still a "proposal", we have to make it real. – joker__ Feb 12 '14 at 18:20
up vote 16 down vote
What is the definition and position of data science and its relations with Data mining, machine learning, statistics, etc?
added by Tyler Sep 3 '13 at 3:13
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up vote 12 down vote
I am concerned that my OLTP environment may start hitting big data problems soon. What sorts of monitoring should I put in place?
added by Chris Travers May 17 '13 at 13:31
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up vote 12 down vote
Which Big Data technology stack is most suitable for processing tweets, extracting/expanding URLs and pushing (only) new links into 3rd party system?
added by Alexandre Rafalovitch Jul 4 '13 at 19:29
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up vote 12 down vote
Can Solr be used as a NoSQL solution?
added by Yavar Aug 5 '13 at 6:49
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up vote 12 down vote
What is a beginner's project that one can get started on that requires the use of data science for large data-set ? (Hadoop..etc)
added by ROBOTPWNS Jan 10 '14 at 17:00
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up vote 11 down vote
What is the difference between Twitter Storm & Esper?
added by Yavar Sep 23 '13 at 9:35
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up vote 11 down vote
Different approaches for choosing the number of clusters for the k-means clustering algorithm
added by Steve P. Nov 30 '13 at 13:12
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up vote 11 down vote
Horizontally scaling a distributed database, what should I use for a simple key-value store? Cassandra, HBase or Riak? what are the pros and cons?
added by Sergio Ayestarán Dec 4 '13 at 23:21
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up vote 11 down vote
How to generate a graph from rules learnend with a decision tree
added by jruizaranguren Jan 10 '14 at 11:12
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up vote 11 down vote
How does one perform parameter estimation and inference on partially directed acyclic graphs (PDAGs)?
added by Steve P. Jan 24 '14 at 18:50
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up vote 10 down vote
What is the most fundamental tradeoff between Hive and Postgres-XC?
added by Chris Travers May 17 '13 at 13:32
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up vote 10 down vote
Big Data consists of continuing to add servers to a cluster forever. How is this not a resource problem?
added by leeand00 Jun 25 '13 at 15:54
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up vote 10 down vote
What is the best way/technique to store a big amount of data coming from the smart grid/smart meters?
added by Pazi ツ Sep 18 '13 at 13:38
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up vote 10 down vote
I use Principal Component Analysis to reduce dimensionality of data to avoid overfitting. Is it considered a bad pattern to use PCA for this?
added by Yavar Sep 23 '13 at 9:38
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up vote 10 down vote
Which is a good Python library having an an array of Machine Learning Algorithms like Logistic Regression, Neural Network, SVM, Random Forest's etc. ?
added by Yavar Sep 23 '13 at 9:42
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Library recommendation questions are considered off-topic on Stack Overflow; I don't think they should be on-topic on Data Science. – David Robinson Oct 30 '13 at 19:55
up vote 10 down vote
Is Postgres-XC considered big data?
added by leeand00 Oct 15 '13 at 2:07
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up vote 10 down vote
What kind of machine learning algorithm would you use to predict the sentiment (happiness, sadness,...) in a written text?
added by joker__ Oct 19 '13 at 12:11
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up vote 10 down vote
Which of those techniques are better for my kind of [data]? LSI of LDA?
added by Tasos Oct 20 '13 at 14:26
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up vote 10 down vote
I'd like to run multiple instances of Scikit-Learn in parallel on somekind of cloud computing service. What is the recommended way to do this?
added by user809695 Oct 21 '13 at 20:03
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up vote 10 down vote
What effect does *dimensionality reduction* have on bias and variance?
added by user809695 Oct 21 '13 at 20:17
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up vote 10 down vote
Is there anyway to set up Scikit-Learn to accept input data in the form of a database file? Maybe using Pandas or some other module?
added by user809695 Oct 21 '13 at 20:20
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up vote 10 down vote
What are the flaws with using area under the ROC curve to compare classification models, and is there a better alternative?
added by Tim Goodman Oct 24 '13 at 16:01
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up vote 10 down vote
What are the best standards for time stamping data in distributed systems?
added by aaa Oct 26 '13 at 5:47
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up vote 10 down vote
Which spectral clustering algorithm would work for this dynamic bipartite graph data?
added by Julien Bourdon Nov 1 '13 at 0:57
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up vote 10 down vote
What are the advantages and disadvantages of using SVM as an approach to classification problems, as opposed to logistic regression?
added by Tim Goodman Nov 15 '13 at 19:42
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up vote 10 down vote
When should Variational Bayes Methods be used over Gibbs Sampling or other comparable methods?
added by Steve P. Nov 30 '13 at 13:06
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up vote 10 down vote
Explanation of Belief Propagation over Junction Trees
added by Steve P. Nov 30 '13 at 13:08
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up vote 10 down vote
What should be taken into consideration when determining how often to synchronize the data between the distributed nodes.
added by DFord Dec 10 '13 at 18:22
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up vote 10 down vote
Which methods are available for dimensionality reduction on binary features?
added by jruizaranguren Jan 10 '14 at 10:29
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up vote 10 down vote
How to create interactive web data explorations diagrams server-side with python
added by jruizaranguren Jan 10 '14 at 11:07
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up vote 10 down vote
Why is the big data movement so closely associated with the open source movement, despite its wide uses in commercial venues ?
added by ROBOTPWNS Jan 10 '14 at 17:04
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up vote 10 down vote
How to write HBase index for faster queries?
added by dvdnglnd Jan 10 '14 at 18:02
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up vote 10 down vote
Functional programming seems well suited to BigData; why is there no native Python/Ruby/Haskell implementation of Hadoop Map/Reduce?
added by ChuckCottrill Jan 17 '14 at 23:50
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up vote 10 down vote
How important is data locality to Hadoop and Map/Reduce?
added by ChuckCottrill Jan 18 '14 at 0:35
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up vote 10 down vote
What are the biggest pitfalls to avoid when using Map/Reduce to query data?
added by ChuckCottrill Jan 18 '14 at 0:35
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up vote 10 down vote
Talking about Data-Science, NoSQL comes in picture most of times. What is the difference between NOSQL and SQL?
added by vishram0709 Jan 19 '14 at 11:36
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up vote 10 down vote
How does the number of training examples influences the Bias and the Variance of my model?
added by joker__ Feb 12 '14 at 18:23
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up vote 10 down vote
How does a Data Scientist differ from a Statistician?
added by ChuckCottrill Feb 22 '14 at 0:40
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up vote 10 down vote
When should I use hierarchical clustering instead of non-hierarchical clustering?
added by Cici Feb 26 '14 at 18:48
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