Mark Alen - user overview - MetaOptimize Q+A

Mark Alen

1,323

karma

Registered user
member since	Jul 02 '10 at 21:20
last seen	May 12 '13 at 05:12
user's website	http://twitter.com/siah

I am a PhD candidate at UC Berkeley

I sometimes work as an independent consultant in the fields of machine learning, data mining and NLP

[email protected]

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21 Questions

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Simple distributed and approximate linear regression

Mar 07 '12 at 06:39 Alexandre Passos ♦25541●54●278●421 (asked by Mark Alen1323●23●41●46 )

linear-regression mapreduce

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Rating inference problem

Jan 03 '12 at 20:34 Robert Layton1625●12●26●37 (asked by Mark Alen1323●23●41●46 )

sentiment-analysis

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Conditional Expectations on Graphical Models

Oct 29 '11 at 15:42 Alexandre Passos ♦25541●54●278●421 (asked by Mark Alen1323●23●41●46 )

graphical-models

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Rating inference using SVM or similar models

Oct 18 '11 at 22:45 Alexandre Passos ♦25541●54●278●421 (asked by Mark Alen1323●23●41●46 )

featurization

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GPU vs. CPU and Machine Learning

Aug 25 '11 at 16:28 Brian Vandenberg824●21●37●46 (asked by Mark Alen1323●23●41●46 )

gpu

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Going from bag-of-words to better language models

Jun 15 '11 at 04:46 Georgiana Ifrim166●4●4●14 (asked by Mark Alen1323●23●41●46 )

bag-of-words natural-language-processing regression

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Automatically selecting the number of topics in LDA

Mar 29 '11 at 09:19 lily16●1●1●4 (asked by Mark Alen1323●23●41●46 )

lda topic-models

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Well Tested Latent Dirichlet Allocation in Python

Mar 24 '11 at 09:22 Radim386●7●9 (asked by Mark Alen1323●23●41●46 )

python lda

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Scientific literature on question answering algorithms

May 17 '11 at 14:43 horsh1 (asked by Mark Alen1323●23●41●46 )

question-answering

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How does IBM Watson work?

Feb 15 '11 at 13:12 karpathy266●4●7●9 (asked by Mark Alen1323●23●41●46 )

qa watson

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Should we use "Function word" instead of "Stop word"?

Jan 21 '11 at 08:30 Alexandre Passos ♦25541●54●278●421 (asked by Mark Alen1323●23●41●46 )

nlp

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LDA toolbox for MATLAB

Jan 11 '11 at 16:14 Aengus Robinson230●5●11●14 (asked by Mark Alen1323●23●41●46 )

lda matlab

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Good tutorial on feature selection

Jan 24 '11 at 08:11 Lucian Sasu513●17●26●34 (asked by Mark Alen1323●23●41●46 )

feature-selection regression

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Using SVM instead of logistic regression

Feb 16 '14 at 15:36 ouyang15●9●10●11 (asked by Mark Alen1323●23●41●46 )

supervised-learning svm logistic-regression

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What are the pros and cons of using t-SNE

May 04 '11 at 10:49 Laurens van der Maaten1006●5●13●24 (asked by Mark Alen1323●23●41●46 )

dimensionality-reduction t-sne pca

View all questions by Mark Alen

22 Answers

Stanford Feature Learning?

Python Alternative to AnyLogic?

How does one write math on this site?

Crowdsourcing solution: Amazon MTurk vs. Crowdflower

Visualization tools for large data sets

Best algorithms for clustering via keyword occurrence

What NLP problem would you tackle (and how) if computers were a million times faster?

Telling why something was ranked high (or why it was suggested to you) ?

Convex Optimization on the JVM

Method for evaluating a car sales model

Retrieving data from FIFA website

ManyEyes-like tools to generate word tree and phrase net viz?

Good programming abstraction to represent a Dataset

Large scale graph visualization

What are some good habits / methods for organizing large datasets?

How do I test a method (murmurhash) for generating random numbers?

What are the best resources to use when starting machine learning for an experienced programmer?

What is the best freely available face-detector implementation?

New to data mining - where to start?

56 Votes

pca × 5
dimensionality-reduction × 5
t-sne × 5
supervised-learning × 4
cuda × 4
svm × 4
pig × 4
nltk × 4
logistic-regression × 4
bag-of-words × 4

natural-language-processing × 4
qa × 3
python × 3
feature-selection × 3
matlab × 3
collocation × 3
references × 3
featurization × 3
sparsity × 3
sparse × 3

watson × 3
question-answering × 2
unsupervised-learning × 2
sparse-coding × 2
java × 2
topic-models × 2
dataset × 2
neural-networks × 2
linear-regression × 2
sampling × 1

code × 1
convex × 1
analysis × 1
community × 1
hashing × 1
db × 1
implementation × 1
noob × 1
statistics × 1
mturk × 1

19 Kudos

● Well-Known Question × 21
● Conspicuous Question × 21
● Prominent Question × 21
● Appreciated Question × 8
● Prized Question × 8
● Appreciated Answer × 8

● Esteemed Question × 5
● Cherished Question × 4
● Esteemed Answer × 3
● Cognoscenti × 2
● Revisionist × 1
● Blue Pencil × 1

● Mentor × 1
● Advocate × 1
● Inquisitive × 1
● Guide × 1
● Adulated Question × 1
● Participant × 1

● Adulated Answer × 1

Registered user

21 Questions

22 Answers

56 Votes

50 Tags

19 Kudos