Tagged Questions

0
votes
0answers
13 views

How to convert a spaceless data into tab delimited in R? [migrated]

I have a data set in form of:(this is just an example) 1324501020 3241030205 4332020134 which each row represents responses of an examinee to a set of items on a ...
2
votes
2answers
69 views

How can I convert my dataset into a new dataset which is adjusted for confounding covariates?

I have used software before to do linear regression and factor in/out the confounding variables, but what I would like to do is generate a new data set which is adjusted for the confounding variables. ...
1
vote
6answers
693 views

How to detect outliers in skewed data set?

I am working on my school datamining project. Within preprocessing stage I need to remove outliers from my data set which is positively skewed (see description). I have an idea to remove all values ...
0
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0answers
39 views

Question on re-indexing data for graphing

A file contains data for 1975-2012 of housing prices across a panel of countries. However, it's indexed to 2005, so each country's housing price series converges to 100 in 2005, then they spread ...
0
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0answers
107 views

Data transformation for PCA

I'd like to run a PCA (Principal Component Analysis) on my data, but I have a number of registries of some species as a dependent variable and 5 different variables of habitat (altitude, slope in ...
0
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0answers
37 views

How to handle unbalanced dataset on classes distribution?

I have a big data-set (KDD'99 dataset), with 3 million instances but has also really unbalance for the distribution of 4 classes. Is there any way to balance the data-set as keeping it consistent.
0
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0answers
149 views

What are the Best Web Based Open Source Data Exploration Tools [closed]

I am looking for a web based and open source data exploration tool. Some of the key features I am looking for include: faceted search capabilities ability to hopefully connect to more than one data ...
1
vote
1answer
42 views

Preprocessing of non-linear and censored variables

I now ran into two variables that give me problems. I know that I want to try to include them in the final model, but I'm unsure how the values should be treated in order to reflect the true nature of ...
2
votes
0answers
69 views

Normalizing 3D position data

I have a training set with 4 different 3D position vectors as some of the features. I have defined a new 3D coordinate system based on the first 3 of these position vectors to achieve translational ...
0
votes
1answer
79 views

How to extract daily values from 16-day dataset throughout a year?

I have two sets of data. The one is daily temperature data and another is 16-day vegetation observation data (value of Jan 1, Jan 17 etc), throughout a year. But I need daily values of vegetation ...
0
votes
0answers
264 views

What data structure is necessary for survival analysis?

I'm relatively new to survival analysis and try to get my data in the right shape. I have two tables both concerning the observed individuals. If I just would use one of the tables, I would have ...
3
votes
3answers
194 views

Literature on generating “similar” synthetic time series from observed time series

The motivation for this question is from Finance. I have some market data (daily time series) for the price of some securities and I would like to generate synthetic versions of these which are ...