Skip to main content
Mathematics

Questions tagged [data-analysis]

Questions on the use of mathematical techniques to extract properties from given data. Consider if your question might be more suited for Cross Validated (stats.SE) instead.

Filter by
Sorted by
Tagged with
0 votes
0 answers
46 views

We have three types of basic numerical differentation: Forward, Backward and Central defined as such: Forward difference (uniform grid) $\frac{df}{dt}\Big|_{t = t_i} \approx \frac{f_{i+1} - f_i}{\...
1 vote
1 answer
41 views

I’m currently studying persistent homology, and I’m quite new to the topic — so please forgive me if this is a naive question. I’m trying to analyze 2ドルD$ data where each axis represents quantities ...
0 votes
0 answers
25 views

I have some data analysis that I need to do, but I am not sure how to go about using relative error, or if I should even use it at all. I have an experimental result with uncertainties calculated, and ...
1 vote
0 answers
53 views

Consider the following scenario. A set of points is uniformly sampled from the surface of a sphere. Then a perturbation noise is applied to each point, displacing them in space. As the magnitude of ...
0 votes
1 answer
34 views

Assumme a variable $x$ is positively correlated with an event $A,ドル by which I mean that $\rho_{x,1_{A}} > 0,ドル where $\rho$ is the correlation coefficient and 1ドル_{A}$ is the indicator function of ...
0 votes
0 answers
26 views

I am interested in sampling fractal like functions. In three dimensions, but for now let's focus on the real line case. Smooth case If I have a smooth function $f$ I can generate a sampling of $f$ by ...
0 votes
1 answer
146 views

I'm trying to get a deeper understanding of Principal Component Analysis (PCA), and I keep coming across the point that we must center the data around zero before determining the principal components. ...
1 vote
0 answers
42 views

This is my first post here, and I'm nowhere near the level of math knowledge everyone else is, though I am still fascinated by 3d (and color, though here that's irrelevant) related fields. I've been ...
0 votes
0 answers
34 views

I am seeking advice on how to handle a specific type of systematically missing data (SMD) variable in a longitudinal survey dataset. From what I understand, SMD in survey-related data is often ...
1 vote
0 answers
102 views

If anything, it will most likely decrease. Let $A$ be a matrix with $m$ rows and $n$ columns ($m\le n$) and $\sigma_m(A)>0$. Let $A'$ be the same matrix with one row removed. Their condition ...
0 votes
0 answers
65 views

I seek a probability bound for the equivalent event: $\vert \vert P_{X} u - P_{\mathbb{E}\left( X \right)} \mathbb{E} \left( u \right) \vert \vert^{2}$ $<$ upper bound. Something like a Hanson ...
0 votes
0 answers
36 views

I know how to do it for polynomials and geometric sequences but I can't figure out how to do it for data made from the sum of and exponential term and a polynomial. I am studying for the EDPT which ...
0 votes
1 answer
104 views

I am aware that there are algorithms to fit, say, an ellipse to a bunch of given points on a plane. For instance, this SO question has answers which feature both literature on the algorithms and ...
1 vote
1 answer
76 views

I am trying to predict the date when my water tank will become empty using linear regression. I have a sensor that tells me how much my tank is full in percentage. I take a single measurement every ...
1 vote
1 answer
117 views

This is a graph showcasing the lemonade sales as per temperature. Multiple data points: $(30, 90), (35, 100), (37, 110), (42, 125), (50, 140),ドル etc. Now, as I have been studying the equation of a line....

15 30 50 per page
1
2 3 4 5
...
72

AltStyle によって変換されたページ (->オリジナル) /