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Questions tagged [data-analysis]

Use for question relating the the techniques of data analysis.

Use for question relating the the techniques of data analysis.

The art and craft of turning the collected pile of numbers into a clear statements of what physics was or was not observed, and making those results comparable to theoretical expectations.

There is a huge body of work on this, even when separated from the indispensable tools of statistics and error analysis.

445 questions
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Does $R=\dfrac{4q^2}{\pi^2a^2gH^2}$ suggest a square root relationship?

I did an experiment involve how R scales with q (the other variables are constant), and I got a relationship like $R\ \propto \sqrt q$ I have been told to evaluate my findings with those in literature, and I found an equation in literature to…
Jim
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Choice of color for graphs with filled area

I am writing an article and the central results are summarized in a graph so I want it to be very beautiful and physically intuitive. It has 3 regions in which a certain quantity is conserved, partially conserved or not conserved so I want them to…
Red
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Fitting power law with shift to experimental data

I have some data that I can tell visually that scales like a power law. However, the $x\rightarrow \infty$ and $y\rightarrow \infty$ asymptotes of the data are nonzero. I should thus fit the data to something of the form $$y=a(x-b)^c+d$$ I am trying…
sodiumnitrate
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Data Analysis: Image Sharpening through Posterization

I had this image, a picture of Jupiter: I wanted to measure the pixel diameter of Jupiter. As evident, the image is quite blurry, and thus, many value of equally justified pixel diameters can be obtained. To eliminate this I posterised the image…
StopReadingThisUsername
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Log of a quantity and graphs in log-scale

Is there any difference between taking the logarithm of a quantity, and plotting a quantity in logarithmic scale?
Ana
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What about assessing negative Limit of Detection for concentration

I recently came in a work-group discussion where I think some concepts are misused. After seeking for scientific articles on the subject I have found that part of the problem is definition (what exactly is a LOD and how should we define it). But I…
jlandercy
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Fitting decay with background to find decay rate

I am trying to fit data (muon decays) to find the decay rate. The detection technique introduces a background rate of false decays uniformly distributed throughout the range of data (0 to 20 µsec). So, in other words, the data theoretically should…
Eric Stimpson
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Data analysis of ratios

I am analyzing some observational data which includes the ratio of masses (two masses for the same object, but measured using different methods). In principle, it is largely arbitrary whether one chooses to consider the ratio of Mass A to Mass B or…
lordnoob
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Data Adaptive technique

I read in many research paper about the data adaptive analysis techniques. I tried a lot to find the meaning of 'adaptive' in data analysis. What is the main function of the adaptive nature of the analysis technique?
Amit
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Power law correlation between with three parameters

I made a CFD model of the Centrifugal Atomization Process. Studies show that the mean particle size $d_{32}$ can be expressed as a function of the three operating dimensionless numbers (Reynolds, Ekman and Ohnesorge). Previous works made up…
user231997