Questions on sequences where adjacent samples are time-correlated, making the data suitable for modeling the behavior of the sampled system.

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1answer
45 views

Using TemporalData`DropTimes

I'm not able to figure out how the undocumented command TemporalData`DropTimes described here works. For example, I have ...
3
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2answers
53 views

Using Dataset with TimeObjects in EventSeries

I'm new to Mathematica, and while this is potentially quite easy, I'm having difficulty using TimeObjects in the EventSeries ...
1
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1answer
46 views

Timeseries Analysis. Calculating Returns, Correlations between timeseries data and overlapping data

I have a set of sample time-series data below of monthly prices for two companies. Q1. I want to calculate monthly and quarterly log returns.what is the most expedient way to do this? ...
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2answers
38 views

TimeSeriesAggregate—reformatting the date

Compute Aggregated Statistics for a Time Series The article linked to above provides a sample of aggregating time series data. ...
0
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2answers
33 views

Read timeseries data from CSV

I am new to Mathematica and have v10. I would like to you use the new TimeSeriesAggregate[tsdata, "Quarter", Total] feature to return aggregated descriptive stats. I import a number of columns of ...
-1
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1answer
41 views

representing data for multivariate time series analysis

Please give a simple example of how to represent data for multivariate (vector) time series in Mathematica, so to use TimeSeriesModelFit?
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0answers
36 views

Hidden Markov Model: emissions probabilities dependent on observable parameter

I need to fit an HMM where the emission probabilities (ep) are discrete and dependent on a known variable quantity. E.g.: Imagine a daily time series of binary emissions ("1" or "2"). I suppose an ...
5
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1answer
50 views

Given a TemporalData object, can I determine whether it's a TimeSeries or an EventSeries?

If I have a function that accepts TemporalData objects, is there some mechanism whereby it can determine what kind of object it gets (...
0
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1answer
55 views

Power spectrum density calulation with ARProcess

I have a measurement of $x$ coordinates of an oscillating particle at presence of noise taken at constant time steps of 1/60 s. The corresponding data set can be obtained here: http://goo.gl/...
0
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0answers
57 views

Time series of a point using ImageFeatureTrack

This question regards tracking, however it is more about writing efficiency in mathematica compared to other programming softwares. I get the tracking of a point between two movie frames by: ...
0
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1answer
34 views

Intersection of TimeSeries (reducing a list of TemporalData objects to common dates)

It is possible to do simple math between TemporalSeries objects. For example ...
5
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1answer
70 views

How to specify RegularlySampledQ TimeSeries with EndOfMonth date unit MinimumTimeIncrement?

"EndOfMonth" is date unit that can be used with date functions. When specifying a TimeSeries object with date increments you ...
5
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1answer
55 views

How to prevent TimeSeries adding TimeObject parameter and TimeZone option to DateObjects?

TimeSeries adds a TimeObject parameter and a TimeZone option to ...
5
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4answers
237 views

Plotting multiple lists together with their avarages in a single plot

I have as example multiple lists of x data (in mm) http://pastebin.com/7xwgGDsd which I want to plot against time (in sec). ...
7
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2answers
99 views

TimeSeries interpolation with time gap awareness

Is there an option for ResamplingMethod (or any other practical way) for specifying different behaviours of the interpolation, depending on, for instance, closest dates (on the ...
0
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1answer
85 views

Intercept in the ARProcess

In the ARProcess help file I don't understand whether an intercept is included or not. How would I add one? I am using version 9 of Mathematica.
1
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0answers
68 views

Detrending a time-series by means of Discrete Wavelet Transform

I plot a time-series for observation as you can see in the plot: I tried to detrend the time series by 3 different approaches which are: 1) differences, 2) detrended fluctuation analysis, and 3) ...
2
votes
2answers
49 views

Randomized Control of Time Series Data

I am trying to randomize the order of a time series data set. I generated my data as: ts5 = RandomFunction[FractionalBrownianMotionProcess[.5], {0, 999, 1}] ...
1
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1answer
58 views

freezing in TimeSeriesForecast[]

I have been running TimeSeriesForecast[] over a large number of TimeSeriesModels, and finding that it freezes for some models for some datasets for reasons for reasons I can not figure out. See the ...
3
votes
1answer
70 views

Extended AutoCorrelation Function

Is there a function in Mathematica capable of computing the sample Extended AutoCorrelation Function (EACF)? I know that there's a package in R that does this. I was trying to avoid to having to ...
2
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1answer
69 views

ListPlot of auto-correlation function pushes data 1 lag

I'm trying to plot a graph of a sample autocorrelation function at different lags. The code I'm using is ...
4
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1answer
96 views

Detrending a TimeSeries

I am trying to de-trend a time series that I know has some seasonality. So I thought I would try to use TimeSeries and DateObject functionality to do it. Here's what I have so far : ...
2
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1answer
84 views

Help with Time-Seried dataset

I can't seem to figure out the best way for directly inputting interpolated values into a dataset. I turn to your expertise for guidance. So, I have a multi-year time-series dataset. Column 1 is time ...
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2answers
65 views

Matching timestamped data

I bet this question is a gimme for most of you guys, but I'm having a bit o' trouble figuring it out. Thanks ahead of time for your input and help. Soooo, I have two datasets where column 1 is a ...
4
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2answers
125 views

References on time series analysis

I am interested in time series analysis. I used to evaluate my data by means of Excel. However, I found that Mathematica is a powerful tool that can process different kinds of mathematical operations ...
8
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1answer
92 views

EventSeries v. TimeSeries

I have what technically should be an event series, spike times of a neuron. Here's a subset of the spiking data - ...
2
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1answer
64 views

How to split time series?

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7
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2answers
246 views

Extracting and displaying data from GW150914 hdf5 files

Has anyone looked at the LIGO data using Mathematica or know how to do this? I'm not familiar with the hdf5 format but I've been able to import the data, consisting primarily of 131,072 floating ...
0
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0answers
26 views

Finding a specific position within a TimeSeries Forecast [duplicate]

Say I have a timeseriesforecast on a series of data, result in $10, 30, 50, 100, 400, 700, \ldots$ I want the programme to output the serial number (position in the forecast-series) of the first ...
1
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1answer
175 views

How can I implement a moving standard deviation for a time series?

I imported the following dataset and converted it into a time series. ...
20
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3answers
607 views

Detecting components in timeseries

I'm looking at this sequence of values: I'd like to detect the points where the center of the time-series shifts (around x=1000 and x=2000). Many of the transforms and smoothing methods I have ...
6
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1answer
102 views

DateListPlot failing on Inflation Adjusted TimeSeries

Ran across this (possible bug) today. Here's historical West Texas Intermediate oil prices: ...
5
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4answers
160 views

Add to matrix missing elements (for list of time series)

This question is an extension of the 43122. I’ve looked through many interesting post (like this) but (as always) missed the direct matching. So the setting is simple: ...
3
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2answers
183 views

Merging Financial Time Series

I am trying to merge two or more financial time series. For example, ...
4
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3answers
139 views

How do I plot EventSeries?

The documentation that I can find suggests that I should be able to plot an EventSeries with DateListPlot. But this doesn't work ...
3
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1answer
114 views

Why is TimeSeriesForecast linear?

When I use FinancialData with TimeSeriesForecast, the resulting graph is always linear and thus not very accurate. ...
5
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1answer
100 views

TimeSeriesForecast for a range

Now I have a tsm, say tsm=TimeSeriesModelFit[data]. Now, while using TimeSeriesForecast to ...
1
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0answers
52 views

Autocorrelation in Tail Events

I have a single time series of financial data (stock index returns) and would like to study the autocorrelation among (log-)returns that are classified as "extreme", for example via exceedance of a ...
1
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1answer
148 views

Resampling Data using Temporal Data

I am having a problem using TemporalData. I am simulating a two state system, and every time the system goes into a new state (which happens randomly), then I put ...
3
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0answers
89 views

Split time series by periods of activity

I have a collection of time series that involve periods of activity and inactivity. ...
0
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1answer
66 views

Using Manipulate function on time series data [closed]

I have a list of data {{date,real},{date,real},...,{date,real}} and I want to use the Manipulate function on the data. How do ...
2
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0answers
75 views

Help for Garch-Process

I have questions about the Garch-Process. For example I simulate a Garch-Process: list=RandomFunction[GARCHProcess[2, {.1}, {.2}], {0, 500}] And I estimate my ...
1
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0answers
71 views

Discrete Fourier Transform baseline subtraction

I am trying to remove sinusoidal variability from a set of evenly-spaced intensity vs. time data. These data contain periodic events that are separated by a normalized (but sinusoidally variable) ...
3
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1answer
112 views

Extracting a time series from a sound object

After importing a sound file, how can I generate a time series (preferably as an $n\times 1$ matrix) which gives the intensity at equal time intervals?
3
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0answers
47 views

TimeSeriesInsert issue with Quantity expressions

Solved in Mathematica v10.3 This first sample code works as expected: ...
1
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1answer
106 views

Traffic growth forecast: showing the change of linear regression

The following picture shows a changement in the trend of data. (The data used are available here). Is there any tool that can show this change of trend? Until now I managed to show even more ...
4
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1answer
352 views

TimeSeriesModelFit incorrect?

I am trying to determine the optimal model for time series data (1592 observations). When I run TimeSeriesModelFit, Mathematica selects $AR(1)$ model, the estimated ...
2
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1answer
148 views

Unexpected results from GARCH Processes

I'm playing a bit with Time Series and I've been trying to estimate Garch Processes from different time series. Are TimeSeriesModelFit and ...
2
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1answer
152 views

Barchart recognize time series data?

I can't seem to get Barchart to recognize TimeSeries data. For example, my data is: {{1891, 1}, {1892, 1}, {1897, 1}, {1898, 1}, {1903, 1}, {1904, 1}, {1905, 1}, {1908, 4}, {1909, 6}, {1910, ...
2
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1answer
73 views

`ResamplingMethod -> None` in `TimeSeries` does NOT take any effect in v10.1

Possible bug in v10.1 ResamplingMethod -> None in TimeSeries does NOT take any effect in v10.1. Try: ...