Structured data files in any format, collected together with the documentation that explains their production or use.

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19 views

What is my chart type called?

I have my main data feed which only collects a new value if it is different from the last (it checks every 13 seconds) and from this I build a line chart. Is there a name for this type of chart? ...
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13 views

Null Values in Survey Data

What is the recommended approach for cleaning/preprocessing survey data that contains null values for some responses? An example of some responses are as follows: "Were you treated with respect?" ...
0
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1answer
8 views

Historical forward exchange rate data between $/yen [on hold]

Does anybody know where I can find historical forward exchange rate data between the us $ and yen? I've looked for quite a while (federal reserve, OECD, Thompson Reuters, etc) but haven't been ...
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0answers
10 views

algorithm to predict cost function

The goal of problem is to predict the weight for missing data . I have a dataset of categorical type as shown below ...
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0answers
16 views

How to merge overlapping discontinued data time series?

I have two datasets consisting of the US Federal debt held by Federal banks with a timespan covering the period 1953Q1 to 1988Q4 and 1970Q1 to 2014Q2. (series FDHBFRB and FDHBFRBN from the FRED ...
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1answer
42 views

Can you identify what the sharp spikes in our data could be?

Scenario: There was an online competition to win a prize. The competitors are technology start-up companies and the prize is worth around 5,000 USD. There was a public, online vote to decide the ...
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1answer
30 views

Publications in the social sciences or psychology based on freely available datasets?

There are a lot of datasets freely available across the web (see CV questions here, here, or here). Yet, I want the reverse: I am looking for a list of publications in the social sciences or ...
3
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1answer
48 views

How do I cite a dataset in a paper?

I want to use the iris dataset provided by scikit-learn for a paper. But I don't know what the standard for referencing datasets is. What citation should I use for this dataset in my paper? Should I ...
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23 views

Have a data set for 3 consecutive days. What are my options?

Let's say I have a set regarding the transportation methods(Eg: car, bus, train) used for three consecutive days b y $n$ number of people. For simplicity let us assume that everyone use only one type ...
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1answer
25 views

Why does my repeated measures ANOVA analysis vary when I organize my data differently?

In my study there were 63 types of stimuli (63 levels of the IV) and all types had 8 different examples (8 trials per level of IV) which were all categorized by each participant. Accuracy of ...
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0answers
10 views

Are there free APIs for searching news articles that I can use to collect trend data in news coverage? [migrated]

I am working on a data-visualization web application that looks at trends in American news media coverage over time. It takes a keyword (or keywords), a date range, and a time increment as parameters ...
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6 views

Multiple combinations (ex drug-ADR) with the same unique case ID.

I am quite new to R statistics, and I one you can help me. I have tried finding the answer to my question by searching the forum and so on, and I apologize in advance if my question is trivial or ...
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30 views

Data structure for Inverse Cumulative Distribution when columns are *NOT* separate variables

I am trying to structure data to conduct a Frequency analysis and output an Inverse Cumulative Distribution histogram for a biomechanics study. The goal is to compare 4 devices with respect to their ...
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23 views

What are some of the image classification datasets other than MNIST on which Deep Belief Network (DBN) has produced good results?

What are some of the image classification datasets other than MNIST on which Deep Belief Network (DBN) has produced state-of-the-art results? Even if its not state-of-the-art, but, I am looking for ...
1
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1answer
11 views

What method should I use to model simplified performance

I have the data of some build times. These builds occur on a cloud and the runtime has been more varied than in the past. One thing that could be occurring is an improper sharing of resources ...
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1answer
42 views

Once you have a set of training data, how do you go about training a model?

I've been trying to teach myself machine learning using some books, kaggle and other resources so I'm still very new at this. I'm trying to do a competition on kaggle and I've obtained a dataset. ...
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0answers
6 views

Same data set but different method for analysis [migrated]

A data set has been analyzed in a research paper. Is it possible to use the same data set but different analysis technique and write a research paper?
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1answer
30 views

Standard model for time series with (possibly multiple) seasonal component

Suppose you have a "new" way to formalize a seasonal component and you want to see if your method is worth to be published. My idea is to take a "standard" model for time series with seasonal ...
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0answers
14 views

Mathematics of simple performance testing [duplicate]

I have a set of sorted tables T that have known but different dimensions. There are two types of functions in this system: f(T) g(T, n), where n is an integer parameter. ... and two types of costs ...
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6 views

Data Collection Design

Would like some critique on data selection for testing. I am planning some indoor imagery localization experiment. I have two kinds of data (i) Image coming to me at 25HZ (ii) telemetry coming to me ...
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2answers
37 views

Large data set, need PROPER way to calculate averages

I'm working on an excel sheet with 26k lines and need to calculate average costs per KG. I'm not sure which method of calculation to use as each is giving me different results. For example: ...
1
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1answer
33 views

Missing data analysis software

Does any standard statistical software like R, SAS or SPSS have procedures or codes to analyze log-linear models for missing data in contingency tables using maximum likelihood estimation (or EM ...
1
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1answer
15 views

Supervised learning algorithm that can be easily retrained with new data

I have a web crawler and i want to be able to differentiate a specific class of website (social networks), from others. My problem is that my starting classified data is really small. What I wan't to ...
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0answers
16 views

when to use panel time-series regression vs seeming unrelated regression

I am a bit confused on whether or not I have to use a fixed-effect panel time-series method or SUR (seemingly unrelated regression). To get a background of what I am trying to do, I have 10 panels of ...
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0answers
8 views

Estimate average of a dataset when thresholded

Suppose I have a dataset $x_i$ (with $x_i >= 0$) of N samples. I would like to determine the average of the data when the data is limited to some theshold c: $limitedaverage(x,c) = \frac{1}{N} ...
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0answers
22 views

Normalize data in unnormalized data after normalization

i have some data in numeric. I want to do some classifications method. So i decided to check the normalization of the data. I have normalize my data using weka tools. And i think weka had normalized ...
6
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1answer
122 views

What are some interesting examples of wrong or crazy inferences being drawn from Big Data?

I'm interested in well-known examples of Big Data misinterpreted, poorly analysed, or wrongly employed to unscientific and incorrect ends. Would appreciate any examples or observations. Thanks a lot!
3
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1answer
68 views

Missing data which simply cannot exist

I have read 80% of missing data in a single variable and understand the approach for dealing with missing data which simply cannot exist for 1 variable. I am trying to generalise this up to 2 or ...
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0answers
19 views

Consistent Questionnaire Responses

I want to ask please questionnaire responses in Likert Scale. I have got some respondents who had consistent answers for a large number of questions. For example, over 75% or 80% answers (in different ...
8
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2answers
137 views

Analysis of hamster wheel rotational data

Before posting this question, I had a browse through other questions on this Stack, and this is probably going to be a walk in the park for anyone who reads it! But the description of this Stack ...
1
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1answer
48 views

How to determine whether a set of data are qualitative or quantitative?

Assume a data set with multiple columns, where the categorical data are coded. What is the best rule(s) or rule of thumb to determine whether each column contains qualitative data or quantitative ...
0
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1answer
29 views

Data imputation for statistical analysis

Here is the situation: I have an individual level data set $X$ where each row is a person $i$ and each column denote characteristics of $i$. The problem is that my data is missing an important ...
0
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2answers
24 views

How to propositionalize a relational data set for clustering analysis?

I am working with a data set of students and their courses for a single semester, attempting to cluster based on the courses & various other attributes where "courses" are the "many" side of a ...
4
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2answers
168 views

Best way to represent data

What is the best way to represent the following data graphically? Can I use a histogram ...
0
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1answer
34 views

Do you know of any public circular/angular dataset? [closed]

I've been trying to locate and access circular/angular datasets for my research. I'm particularly interested in datasets that distribute according to a mean centered circular distribution with ...
0
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0answers
13 views

Term to Describe Strongly Clustered Data

I have some data which are strongly gathered into more than one cluster. I am looking for a term to effectively describe this phenomenon: e.g., multi-clustered data, which however seems to me that we ...
1
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1answer
45 views

statistical analysis with interval data

I have been assigned the task of helping someone who has collected some survey associated data related to some kind of government facilities provided to people. The data corresponding to small scale ...
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0answers
22 views

Categorical Variable with more than 50 levels

I am new to analysis. I would like to know relation between my 2 sets of categorical variables , Both my variables has more than 50 levels. Is it a good approach to create dummy variable and do the ...
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2answers
44 views

How do you draw a random sample of unique IDs in a large dataset?

Rookie here -- I have a a large data set with about 75,000 observations, and 2000 unique IDs. Therefore, each unique ID has about 37 observations. I'm trying to draw a random sample of unique IDs, say ...
1
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1answer
24 views

Distribution comparison across different treatments

if I have a table like this In which, site = different sites of measurement (tissue or organ) type = different types of virus And I want to ask something about the data 1.What test can I use to ...
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2answers
43 views

clustering evaluation based on a gold standard

I have a dataset of items and I want to measure how my clustering method works. I'm using R and simple k-means clustering. I have a lets say gold standard of my clusters and I want to see how good is ...
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0answers
9 views

What is an equi-depth partition of the data?

In the paper Outlier Detection for High Dimensional Data at the beginning of section 1.3 Is written: Each attribute of the data is divided into $\phi$ equi-depth ranges. Thus, each range contains ...
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0answers
14 views

Telecommunication Billing DataSet

Has anyone seen any telco billing dataset available for analysis? I looked at Kaggle or http://www.d4d.orange.com/en/presentation/data but couldn't find anything.
0
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1answer
59 views

problems to build the linear multiple regression in R and to explain the output [closed]

I have a problem to build and to explain the linear multiple regression. I have a data set called Cars93 with 26 variables (numeric and not numeric) and 93 ...
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0answers
19 views

Longitudinal data format in WinBUGS or OpenBUGS, different number of items per time point

I am working with longitudinal data, where there are a different number of "items" per time point. I am working with the MCMCdynamicIRT1d function in ...
2
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2answers
31 views

Get the distribution of a dataset

this is a conceptual question. In data mining, the problem often arises that scientists/data engineers are using an expert guess for the underlying distribution of their data. Often their assumption ...
2
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0answers
20 views

Stores and ordered rank of products

I have data about popularity of some products in some stores. For each of the stores I have only a ordered rank of best-selling products in them. I need help how to find information about which ...
2
votes
2answers
37 views

Tool for generating correlated data sets

Does anyone know of a tool that I can use to generate a set of data with known correlations (and to put the icing on the cake - output this in json,csv,txt or some common format)? I am working on ...
0
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0answers
42 views

Using Cronbach's alpha to test reliability of a questionnaire

I administer a questionnaire to managers asking them to what extent they agree / disagree that they perform certain functions (listed in the questionnaire) on a scale of 1-5. The sample functions are ...
2
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0answers
52 views

Unbalanced Panel: pooled OLS vs FE vs RE - which method yield unbiased and robust estimators?

I am conducting an empirical study (relation between earnings and returns). I have an unbalanced panel with $N=449$ firms and $T=36$ time periods. Regarding the estimation methods I am confused: In ...