Questions tagged [spatio-temporal]
Describes data models with a time-series component and a spatial component.
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Posterior Predictive CARBayesST
I'm trying to use the CARBayesST package and I need to do Spatio-temporal predictions. In the vignette of the package on page 27 says " If there had been saying m missing values, then the Y component ...
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16 views
SpatioTemporal regression
I have a data-set containing rain value for 6 stations and station coordinates (lat,lon). I used lm function taking lat,lon,day, their interaction and rain as below:
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20 views
What is the best way to model a spatialtemporal (3d) problem?
A very common problem in machine learning is that we have time variables. For this we use more statistical approaches like ARIMA or more ML approaches like LSTM.
A sophistication of a time series is ...
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15 views
How to determine causal relationship between two temporal signals?
I have two noisy temporal 1D signals and knowledge that one drives the other, to some degree. You can see this because there are some temporary spikes in the first signal that (sometimes, if they're ...
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Is there something wrong with my Bayesian hierarchical spatio-temporal model?
I built a Bayesian spatio-temporal model and one of the parameters to be estimated is the random spatial effects s. The random spatial effect is assigned an intrinsic conditional autoregressive prior (...
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1answer
29 views
multivariate time series analysis with interactions among multiple dependent variables
I have been playing with time series data and using models like facebook prophet which uses time series decomposition and models the signal using trend, seasonalities and holidays.
The stuff I found ...
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17 views
Can I use a bayesian spatio-temporal model in cluster areas I chose from local Moran's I?
I have crime rates for municipalities in a state with hourly frequency. I want to make predictions about the spatio-temporal behavior of that variable. Is it possible to run a local Moran's I to ...
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13 views
ConvLstm many-to-one model
I am trying to train a model using ConvLstm layers to learn the mapping between a sequence of 20 brain images (showing blood flow) of size 256x256, to a single blood flow parameter image of size ...
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18 views
Dimension reduction for multivariate spatio-temporal data for hurricanes forecast
I have weather data for the 40 previous years and for each year I have information about the hurricane season (intensity, number of active days, casualties,...). My ultimate goal would be to forecast ...
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1answer
265 views
Model for spatiotemporal and discrete variables
I have a situation where I am monitoring events at 50 or so geographical sites in a town and at each of these sites, I am making measurements regarding the count of certain particles (so the ...
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1answer
65 views
Is Hellinger transformation suitable for repeated (in time) site-species abundance data?
I have fish survey data from four different years and several locations, where I would like to study the difference in abundance and biomass between sites and check whether time dependence influences ...
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15 views
Determine Power in IDW Extension Approach
I am attempting to find the optimum power for spatiotemporal Inverse Distance Weighting.
Background...
Because this IDW is spatiotemporal (st) I need to define the st variable c in the Euclidian ...
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33 views
How to compute measures of dispersion and statistical significance of the impacts of a panel Spatial Durbin model (SDM)?
I ran a panel Spatial Durbin model (SDM) and computed the summary measures of impacts (direct, indirect and total). Now, I would like to get measures of dispersion for the impacts estimates as well as ...
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43 views
Location-based time series: predicting Uber surge pricing
As a learning exercise, I'm working on putting together a few different machine learning projects that I can spend some time honing and studying.
One of these projects is predicting the locations of ...
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8 views
Mobile shops temporality adjustment during regression analysis
Suppose I have data set where the residential location of 100 people (longitude, lattitude) and 10 shops (4 mobile shops and 6 fixed shops) are avaliable. Fixed shops are open 30 days a month, but ...
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8 views
statistics of (possibly) non-independent interacting systems with fat tails
I apologize if this question has already been asked. I don't know the proper terminology to find my answer - so if it has, please direct me to it!
Problem setup:
I have many time series of a ...
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17 views
Variable selection in Bayesian spatio-temporal count regression
I am estimating a Bayesian spatio-temporal Poisson model. I have a relatively large set of explanatory variables (20ish) and each time I run the model it takes a few hours to complete. I have seen ...
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234 views
Covariance structures in glmmTMB for temporal autocorrelation
I'm running a zero-inflated, mixed-effects negative binomial model with the glmmTMB package in R.
My current format:
...
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18 views
Spatio-tempral Bayesian Poisson model convergence investigation
I am fitting a spatio-temporal Bayesian Poisson model with 22 explanatory variables, an offset variable, 2200 observations and non-informative priors. I am using the package ...
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9 views
Spatial Temporal Autoregressive Regression and implication on Fixed effects assumption in Difference in Differences
I am currently planning on testing the effects of marginal price change of properties based on an exogenous event using Spatial DID model. The model has a spatio-temporal lagged variable (y) which ...
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1answer
45 views
Spatio-temporal convolutional networks on irregular grids
I'm contemplating a project where I try to take a time series of maps of polygons (which have values) and predict the next map of polygon values.
If it were a regular grid, it'd be a ...
2
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1answer
113 views
Performing random forest on spatio-temporal rasters
We are trying to train a random forest model on land-use and meteorological variables to predict daily concentrations of air pollution at a 1km resolution. Our input data consists of 1km raster stacks ...
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50 views
Spatial Analysis with Repeated Measures
I am doing an agricultural study in which I analyzed parameters of fruit and treated them with different conditions. The fruits were measured once a week for four weeks. Now, I would like to know if ...
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38 views
How to calculate temporal change over time when response is 0 or 1 in r
What would be the best approach to calculate the temporal change in response that has values 0 or 1 over time? For example, I have data df with years ...
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2answers
607 views
Trajectory clustering - preprocessing and algorithms
Context
Consider the following problem where we have two time dependent (yearly) measures:
Fertility rate
Life expectancy
And a dimension: country. In other words we have over two hundred "...
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1answer
164 views
How does Markov random field (bs=mrf) in mgvc gam handle repeated measures on the spatial units?
I am attempting a spatio-temporal model in mgcv gam.
I am using a factor smooth to define each of 27 areal units in a shapefile ("id") as subjects (essentially) which have undergone 23 repeated ...
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88 views
Space-Time Principal Component Analysis with Missing Lat/Long Data
Thank you for your help,
I am looking to run a space-time Principal Component Analysis on Shotspotter data from Brockton, MA: http://justicetechlab.org/data/. Shotspotter sensors record the timing, ...
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89 views
What method should I use for prediction of NUMBER_OF_ORDERS(TIME, LAT, LNG)?
I'm running a pizza service and would like to predict a number of orders for every hour interval during a day per location (basically where we should deliver the pizza) in future.
And I've got a ...
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1answer
76 views
Comparison of groups over time using glm
I have count data on three groups of sites, sampled annually over 6 years.
Group1 = target group
Group2= control (untreated group) and
Group3 = treated group (started the same as Group2).
My ...
2
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1answer
791 views
Interpretation and validation of glmmTMB for ecological count data
I have a couple of questions regarding the analysis of count data using glmms, specifically glmmTMB. I have a four year data set (starting Mar2013 – Dec2016) of insect count data, collected at weekly ...
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1answer
144 views
spacetime R: How to handle missing data in a space-time-full data structure for spatio-temporal kriging purposes?
I am using R and the spacetime package.
I am having problems using STFDF.
I want to use the STF data-structure since I have spacetime data with recurrent observations for fixed spatial coordinates. ...
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1answer
27 views
how to find similar (or twin) precipitation stations from the record
I have precipitation data with some missing values from several stations. I tried to implement IDW to fill missing values. I am looking for some index that could use to select the stations having ...
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1answer
49 views
How can I cluster the following data set to find out the time when ozone and pm level are high in different stations using R?
My data set contains around 630,000 rows and the data set looks like this:
date site code latitude longitude rollingo3 rollingpm2.5
1 ...
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42 views
ETAS model initial parameter determining
I am trying to fit a spatio-temporal epidemic type after schock model to an Earthquake catologue using ETAS package R. However, I do not know about it too much. Without good initial parameter set the ...
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86 views
Advice on time series data analysis
I would like some advice on how I should analyze my time series data.
I have hourly measurements of water temperature data for 12 months across 5 sites. I have summarized my data in following way:
...
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1answer
114 views
How to predict using Spatial temporal hierarchical bayesian models
I am using the R package CARBayesST to fit a Spatial-temporal Bayesian models. I want to use piece-wise ST model proposed by Lee and Lawson, 2017.
The package does not have a built-in predict ...
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0answers
70 views
Machine Learning Classification: 8-Dimensional Time Series
I have a dataset with EMG activations for 8 muscles for several different kinds of movements (squat, deadlift, ...
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1answer
138 views
Metric for spatial auto cross correlation?
I am trying to find anomalies in time series data with geolocations. For different time intervals, e.g. for some week or for some day or for 6 consecutive months, I want to learn whether there is ...
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163 views
Does random forest account for temporal auto-correlation?
I have a dataset including several yearly time series of different sites. I have built multivariate random forest model in a leave-one-site out cross validation model using the ...
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36 views
Review article for spatio-temporal modelling
I'm currently reading Cressie and Wilke's book on spatio-temporal modelling and I'm curious to know if there are review articles that summarize important tools in spatio-temporal analysis. Can anyone ...
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96 views
Modelling time-varying spatial correlation
In spatial statistics and spatial econometrics, very commonly models like the following are employed. Let $Y$ represent the response, $X$ some predictors, $\beta$ the vector of coefficients, $\rho$ ...
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85 views
Can vehicle trajectory data be considered spatio-temporal data?
My Background
I am a graduate student in Transportation Engineering. I know basic Statistics but have never done any time-series/ spatio-temporal data analysis.
Data Format
I conducted an ...
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34 views
determining the significance of change
I have contaminant data in the same area from two surveys conducted 20 years apart (see attached figure). The first survey contain 32 points and second one 48 points. Most of the sampled locations ...
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205 views
Get different results with different sampling order in Gibbs sampling: what could be wrong?
In sampling a complex spatio-temporal model by Gibbs sampling, I found if I change the order of sampling (for example, to sample $P(\theta_1,\theta_2|D)$, in one try, I sample $\theta_1\sim P(\theta_1|...
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0answers
393 views
How to model spatial covariance using Gaussian processes
My data set consists of N noisy time series, each belonging to a point on a surface. The dynamics of each time series are correlated, with correlation decreasing with spatial distance.
I hope to ...
2
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1answer
25 views
Best way to analyze if pairs of relocated endangered animals stick together after release?
I'm working on a conservation project that will soon release ~10 endangered fish that were bred in captivity into a pond. We're hoping this pond serves as a temporal home for a few years, while their ...
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0answers
139 views
Evaluation metrics for cluster or cox process
I am working with spatial point processes and on a dataset which seems to be a non-homogeneous poisson point process. I have fitted a cluster/ cox process model and also used this model to predict the ...
2
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1answer
664 views
Find a polyline best approximating gps points
I have thousands of gps points taken from a public transport vehicle, you can see them below. I would like to get a polyline which would describe "the average route" of this vehicle.
1) I'd like to ...
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229 views
Modeling the residuals of a logistic regression with spatio-temporal observations
I am attempting to generate a probability map based on spatio-temporal observations where the response is 0 or 1. I use R to do the following
I first attempted to use the ...
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31 views
How do we estimate weights of nodes in temporal networks?
I would like to know some approaches or techniques that are used to tackle this problem.
I would like to estimate the weight of every node over time. I have temporal-network with 50 nodes. At every ...
