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.
938
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362
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Fourier series using DFT
I am trying a simple example to do a discrete Fourier transform. My goal is to use DFT to find the frequencies that have built the time signal and then to a good approximation, use DFT data to find ...
1
vote
0
answers
89
views
Way to run the script faster
I have a mathematica code, which is running fine, but it takes long time to evaluate.I have already modified the code with compilation and vectorization as you can see from my code.
May be its a ...
- 11
0
votes
0
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50
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Numerical Integral and Partial Differentiation Of a Complicated Expression
I need help plotting Figures 1 and 2 solving EQ 36 and 37 from https://arxiv.org/pdf/2310.12445. here I am trying to find \Gamma,\phi and their Q values for ...
- 341
1
vote
2
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147
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Histogram from a large dataset
I have a dataset in csv form which contains entries in the following form:
data in mm/dd/yy format, time in 00:00:00 format, day of the week in 'Monday,...,Sunday' format, latitude, longitude
Its a ...
- 145
1
vote
0
answers
97
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Computing eigenvalues and eigenvectors of large matrix and scaling of data
I am trying to plot graphs 1(a1,b1,c1) from https://arxiv.org/pdf/2404.14971 by solving Eq.1. This gives a matrix. For the energy plot, we have to find the lowest 2 eigenvalues and find the difference ...
- 341
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24
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Neural Network erros in NetEncoders?
I'm making a fairly complex neural network, and I've listed all the ports, the network flow, and the layers well. However, when I tried to run the NetGraph, it gave me the error message
...
0
votes
2
answers
68
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Separating clustering data and interpolating as smooth curves
I have a list of data (3kB) in the form of {x,y}. For some x values, every x corresponds to ...
- 137
0
votes
1
answer
79
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How to save a list of data in txt format in mathematica?
I have the following program in mathematica
...
0
votes
1
answer
122
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How to smooth 3D data for a contour plot
I have 3D data, but it is very noisy and is not regular shape in any dimension.
I want to create a contour plot by smooth the data in the third dimension.
Furthermore, I initially used this command to ...
- 61
2
votes
1
answer
95
views
Fitting data to a system of ODE using ParametricNDSolveValue
I am trying to create the following code to fit data to a system of ODE.
...
- 51
2
votes
1
answer
72
views
Two-dimensional integral over data
I am trying to calculate the integral of the data. Following this post, I know what to do with a one-dimensional list. But, let's consider a simple function, just to show you, what I want to do.
...
- 111
2
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1
answer
160
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0
votes
1
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105
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Need explanation on data[[i]][[1]]
I am trying to train a physics model and then check its profile. For this model, data for physics model is defined with:
...
- 655
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33
views
Making NSum faster with higher precision and accuracy
I have the following code that I want to run to obtain a cumulative list out of various values of s1=3 to s1=10 (say) for the ...
- 411
3
votes
2
answers
206
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Problems with diminishing particle diameter and increasing time step for a simulation of volcanic ashes
I am rather new to Mathematica, and I have been tasked with a project to attempt to simulate the trajectory of volcanic ash particles. In the long term, I am trying to simulate particles of diameters ...
- 43