Mathematica Stack Exchange
Mathematica Stack Exchange

Questions tagged [data]

Questions on systematic data handling and analysis, including data correction, manipulation, or selection of user-data or built-in data available with Mathematica.

Mathematica functionality for numerical data.

Handling arrays of data in Mathematica.

Computable data available with Mathematica.

921 questions
12
votes
3 answers

Construct a master curve from data

I will try to be as informative as possible. Clear["Global`*"] I have the following data data91 = {{-0.209091`, 2.89296`}, {0.281818`, 2.92958`}, {0.8`, 2.97535`}, {1.28182`, 3.03028`}, {1.8`, 3.07606`}, {2.28182`, 3.11268`}, {2.5`,…
Dimitris
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8
votes
1 answer

How to reconstruct a missing data point

In the output of a large computer simulation(thousands of cpus for 3 days), I found that one data point is missing in the result. Is it possible to reconstruct the missing value using the remaining data? Assumptions: The dynamics in the data is…
xslittlegrass
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7
votes
4 answers

Splitting data into two same-size and (approx.) same-mean groups

I need to split a dataset into two same-size and (approx.) same-mean groups. I've looked for a function to address it, but couldn't find it (something similar to SAS PROC OPTEX). Has anyone dealt with something similar using Mathematica? If so,…
Ararat
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6
votes
1 answer

Solar radiation data

Is there somewhere in Mathematica I can find direct and diffuse solar radiation for a specific position on Earth ? If not, is there a way to import those data from a website within a Mathematica code ? The best would be a code in which I give…
Adrien
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5
votes
3 answers

How to calculating groupwise mean

I have a huge panel data with more than 2.5 million observations and more than 15000 groups. I want to calculate group-wise mean and I also need Id variable in my result. This is what I have done. dat = {{2, .1, .2}, {2, .2, .4}, {2, .3, .6}, {2,…
ramesh
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5
votes
2 answers

Where is downloaded data saved?

When using functions such as FinancialData or CountryData, on many occasions, Mathematica needs to connect to the Wolfram Research Server to download the necessary information to evaluate these commands. Sometimes internet connection is not…
DMH16
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4
votes
0 answers

How to efficiently read data from any part inside huge file

I have a data file (over 2.5 GB) and I want to do calculations on the data. At first I used. data=ReadList["file", Record,n] I still have three problems: 1- From the Doc of ReadList (ReadList["file",types,n] reads only the first n objects of the…
Basheer Algohi
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4
votes
2 answers

unevenly spaced data

Suppose I have a (very large) noisy data set of points $(x_i, y_i)$ and I want to smooth it. Mathematica seems to have a number of smoothing schemes (EstimatedBackground[], ListConvolve[], etc) but they all seem to have the underlying assumption…
Igor Rivin
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4
votes
1 answer

Saving and Reading data across computers

I DumpSaved some data from my home laptop, uploaded it onto google drive and now I am trying to open it at my school computer but I am getting errors, even though the data is in the correct directory. My data is bunch of data for different parameter…
Amatya
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4
votes
2 answers

Is there an efficient way to access AdministrativeDivisionData?

There is a ton of good data buried in the Wolfram data stores; however, trying to access that in bulk tends to be excruciatingly painful since the access constructs are designed for accessing a single nugget at a time. My current issue is that I'm…
Mark Kotanchek
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3
votes
1 answer

How do I find local minimums in data?

Mathematica easily allows you to use FindPeaks to find local maxima in your data is there any equivalent function for finding local minima?
Ian Neethling
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3
votes
1 answer

Need help with extracting columns from a table

I'm trying to clean a dataset of unnecessary variables but I constantly get an error when doing so. Following an example where: rawDataDiamonds = «dataSetDiamonds»; dataDiamondsTemp = Delete[Transpose[rawDataDiamonds][[All,1]][[All,{1,2}]],1] gives…
Malganas
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3
votes
2 answers

Modifying data in dataset

I have a set of data DataUfunction = {{0.05`, -0.0577145`}, {0.1`, -0.112325`}, {0.15`, \ -0.163893`}, {0.2`, -0.212483`}, {0.25`, -0.258162`}, {0.3`, \ -0.301001`}, {0.35`, -0.341072`}, {0.4`, -0.378448`}, {0.45`, \ -0.413206`}, {0.5`, -0.445422`},…
Christian
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2
votes
2 answers

Need help in making a fit to my experimental data

This is what I have done so far. The points are of angles-of-deviation and wavelengths from my physics lab experiment. V = ListPlot[ {{589.3, 53.50}, {435.8, 56.02}, {535.4, 54.52}, {546.1, 53.57}, {577.0, 53.13}, {690.9, 52.10}, {402.6,…
taya
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2
votes
1 answer

Solution for WordData corruption

WordData["telecommuting", "BaseForm"] return the result $Failed but Entity["Word","telecommuting"]["BaseForm"] return like expect. That means WordData has an amount of data being corrupted. I am trying to preload the data `WordData[All,"Preload"].…
Nhan_nht
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