Skip to main content

machine learning - Predict a lagging continuous observable based on leading continuous parameters?


Consider a time dependent observable obs[t] and a set of n time dependent parameters par[i,t] with i=1,...,n. The observable is such that it is lagging behind the parameters (current observable value is correlated to some degree with parameter i values a time t0[i] respectively in the past). I would like to have a machine learning model that predicts the observable based on the data of the parameters.


In search for ways to do the above, I have found the function TimeSeriesForecast, but it only seems to take one input sequence and predict the same. I am also aware of the Predict and Classify, but they seem to be working purely statistically, not taking continuity in time flow into account. Which means that the time shifted correlation will not be captured.


Question:


Is there a way to use mathematica to employ past and current data of obs[t] and par[i,t] in a machine learning model, in order to predict obs[t] taking into account its lagging nature in time for stronger correlation?


EDIT:


I was asked to provide a sample set of data. On this gist.github page you can find and copy/paste observable data obs that has 700 time steps, as well as parameter data par1, par2, par3 with same number of time steps:



ListPlot[obs]


enter image description here



{ListPlot[par1],ListPlot[par2],ListPlot[par3]}


enter image description here




As mentioned before, each parameter data is correlated with observable data under a respective time shift (parameters see to some extent what will happen with observable in the future). The goal is to predict as well as possible e.g. the next 300 time steps of the observable (not included in the obs data above, but present to some extent in the parameter data):


enter image description here




Comments

Popular posts from this blog

plotting - Plot 4D data with color as 4th dimension

I have a list of 4D data (x position, y position, amplitude, wavelength). I want to plot x, y, and amplitude on a 3D plot and have the color of the points correspond to the wavelength. I have seen many examples using functions to define color but my wavelength cannot be expressed by an analytic function. Is there a simple way to do this? Answer Here a another possible way to visualize 4D data: data = Flatten[Table[{x, y, x^2 + y^2, Sin[x - y]}, {x, -Pi, Pi,Pi/10}, {y,-Pi,Pi, Pi/10}], 1]; You can use the function Point along with VertexColors . Now the points are places using the first three elements and the color is determined by the fourth. In this case I used Hue, but you can use whatever you prefer. Graphics3D[ Point[data[[All, 1 ;; 3]], VertexColors -> Hue /@ data[[All, 4]]], Axes -> True, BoxRatios -> {1, 1, 1/GoldenRatio}]

plotting - Filling between two spheres in SphericalPlot3D

Manipulate[ SphericalPlot3D[{1, 2 - n}, {θ, 0, Pi}, {ϕ, 0, 1.5 Pi}, Mesh -> None, PlotPoints -> 15, PlotRange -> {-2.2, 2.2}], {n, 0, 1}] I cant' seem to be able to make a filling between two spheres. I've already tried the obvious Filling -> {1 -> {2}} but Mathematica doesn't seem to like that option. Is there any easy way around this or ... Answer There is no built-in filling in SphericalPlot3D . One option is to use ParametricPlot3D to draw the surfaces between the two shells: Manipulate[ Show[SphericalPlot3D[{1, 2 - n}, {θ, 0, Pi}, {ϕ, 0, 1.5 Pi}, PlotPoints -> 15, PlotRange -> {-2.2, 2.2}], ParametricPlot3D[{ r {Sin[t] Cos[1.5 Pi], Sin[t] Sin[1.5 Pi], Cos[t]}, r {Sin[t] Cos[0 Pi], Sin[t] Sin[0 Pi], Cos[t]}}, {r, 1, 2 - n}, {t, 0, Pi}, PlotStyle -> Yellow, Mesh -> {2, 15}]], {n, 0, 1}]

plotting - Mathematica: 3D plot based on combined 2D graphs

I have several sigmoidal fits to 3 different datasets, with mean fit predictions plus the 95% confidence limits (not symmetrical around the mean) and the actual data. I would now like to show these different 2D plots projected in 3D as in but then using proper perspective. In the link here they give some solutions to combine the plots using isometric perspective, but I would like to use proper 3 point perspective. Any thoughts? Also any way to show the mean points per time point for each series plus or minus the standard error on the mean would be cool too, either using points+vertical bars, or using spheres plus tubes. Below are some test data and the fit function I am using. Note that I am working on a logit(proportion) scale and that the final vertical scale is Log10(percentage). (* some test data *) data = Table[Null, {i, 4}]; data[[1]] = {{1, -5.8}, {2, -5.4}, {3, -0.8}, {4, -0.2}, {5, 4.6}, {1, -6.4}, {2, -5.6}, {3, -0.7}, {4, 0.04}, {5, 1.0}, {1, -6.8}, {2, -4.7}, {3, -1....