Computational Science Stack Exchange
Computational Science Stack Exchange

Questions tagged [data-analysis]

Data Analysis is the process of evaluating data using analytical and logical reasoning to examine each component of the data provided.

74 questions
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What is the difference between Computational Science and Data Science?

Background: My PhD was in 'Computational Science'. My dissertation was on the analysis of X-Ray Diffraction Data and analysis of thermally perturbed nuclei in the overall dynamic analysis of the molecular electron density for solid state physics.…
drjrm3
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Fit my data to Lissajous curve in Matlab

I'm acquiring data which looks like this: Theoretically it should be possible to fit it with a Lissajous curve, which is typically defined in the following way: $x = A \sin(a t + \delta)$, and $y = B \sin(b t)$. However, neither the cftools or…
sciencenewbie
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what is the best theory/model to use for prediction in multivariate data?

I use software for pollutant propagation on rivers that takes as input a set of parameters ($p_1,p_2,\ldots,p_n$) and creates an output file which is basically a matrix where on each row the concentration of the pollutant in various places along the…
Sorin Ciolofan
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How to extract connected components from persistence diagram?

From the given point cloud (Fig. 1), I use Scipy-TDA to extract persistence diagram (Fig. 2). What I'm interested in is to extract 3 circles. For example, I'd like to know 3 center points and labels for each point. I'm quite newbie to topological…
jakeoung
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Validating a Markov chain and Bagging to find overall model

let´s say I estimated a Markov chain by splitting my data into traning and test data, and estimating the transition matrix for the traning data yields $$ P= \begin{bmatrix} p11 & p12 & p13 \\ p21 & p22 & p23 \\ p31 & p32 & p33 \\ …
Arrebimbomalho
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FFT (Numerical Recipes in FORTRAN 77)

I am trying to use the subroutine twofft which in turn uses subroutine four1 in the book(Numerical Recipes in Fortran) to compute the FFT of two double precision data arrays. If you carefully look at the twofft routine, the arrays fft1 and fft2 are…
MSIngh
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SciDB vs OLAP cube

I am working on good retrieval mechanism for big data systems. I am of view that multidimensional structures could be of great use for aggregations and querying . Multidimensional structures as mentioned in theory/products could replace the need…
irfan Munir
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