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I want to be good in Data Structures and Analysis esp. in Java. I often find myself very weak. What should I do to be good in it? Any good mental exercises?
Started by askgelal on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
An excellent book on complexity analysis, including the properties of popular and not-so-popular data structures....
For the analysis of the data structures, you need to study discrete mathematics (combinatorics) and statistics.
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Does anyone know where I can find nicely organized in one placed (maybe a table, but doesn't have to) an asymptotic analysis of basic data structures. I'd like to refresh my understanding of data structures and also search and sorting algorithms. So I...
Started by Tom on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Here is a table for big O notation: Comparison of data structures
A good place to look.
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I'm playing around with sentiment analysis, and I'm looking for some seed data. Is there a free dictionary around?
It can be really simple: 3 sets of texts/sentences, for "positive", "negative", "neutral". It doesn't have to be huge.
Eventually I'll probably...
Started by Ken on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Hi Ken,
If you're interested in sentiment dictionaries....
Bing Liu and Minqing Hu from UIC have a number of datasets:
http://www.cs.uic.edu/~liub/FBS/CustomerReviewData.zip http://www.cs.uic.edu/~liub/FBS/Reviews-9-products.rar Bo Pang from Cornell has some more .
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I am working on an analysis tool that reads output from a process and continuously converts this to an internal format. After the "logging phase" is complete, analysis is done on the data. The data is all held in memory.
However, due to the fact that ...
Started by ehamberg on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Database library like sqlite ?
If you used that or similar it will take care of moving the data logging data is in a custom format if each item has a key or index of some kind a small light have smarter algorithms you can configure as needed....
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We'd like to see if we can get some improved performance for analysis and reporting by moving some of our key data into Analysis Services cubes. However, I haven't been able to find much in the way of good client front ends.
Our users have Office 2003...
Started by Paul G on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Also search.
There is even one tailored to SSAS 2005.
It turned out to be a great move (for us..YMMV) and I have been very impressed with how well the data and buying The Data Warehouse Toolkit book.
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Hi,
I have around 90 respondents who have ranked certain values on a ranking scale (ordinal data). Now I want to do a cluster analysis to check if there are any groupings that would throw up. Few questions that I have:
1. Can we perform cluster analysis...
Started by mdedeepya on
, 11 posts
by 7 people.
Answer Snippets (Read the full thread at researchinfo):
However, did not get analysis on ordinal ....
To your first question, yes, cluster analysis can be applied to ordinal data, as can various forms clusters and then k means to do the cluster analysis on such ranked data.
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I want to answer questions about data in Erlang: count things, correlate messages, provide arbitrary statistics. I had thought about resorting to Hadoop for this but is it possible to build a solution in raw Erlang to do rather arbitrary data analysis...
Started by John Wright on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
It isn't optimized heavily for such work, so it will have trouble... .
For general-purpose computation and statistics, Erlang works just fine.
Explain your use case better and you will get a better reply .
Why not?
Erlang is Turing-complete, after all.
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I've been using F# for a while now to model algorithms before coding them in C++, and also using it afterwards to check the results of the C++ code, and also against real-world recorded data.
For the modeling side of things, it's very handy, but for the...
Started by Benjol on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Some people call Matlab or R from F#-in' is a programming environment... .
Functionalities in general, R is best for data input/manipulation/visualisation/analysis/etc can be viewed as massive mathematical/data analysis toolkits.
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I have a database full of reviews of various products. My task is to perform various calculation and "create" another "database/xml-export" with aggregated data. I am thinking of writing command line programs in python to do that. But I know someone have...
Started by wailer on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Please provide some more detail on....
If you want to index and search the data, take a look at the whoosh search engine.
What kind of analysis are you trying to do?
If you're analyzing text take a look at the Natural Language Toolkit (NLTK).
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Many of us have used Perfmon tool to do performance analysis. Especially with .Net counters, but there are so many variables going on in Perfmon, that it always becomes hard to interpret Perfmon results in to valuable feedback about my application. I ...
Started by Vin on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
A good explanation about a few .net counters can be found here
I use the Performance Analysis.
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