Questions tagged [time]

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12 views

What is best practice to feature engineer from prior event counts?

Say for example I am building a model to predict a customer churn event from Spotify, with my target being whether a customer churns in the next 90 days. One feature I might expect could be predictive ...
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0answers
20 views

Modeling count data with time-dependent rate

For processes of discrete events occurring in continuous time with time-independent rate, we can use count models like Poisson or Negative Binomial. For discrete events that can occur once per sample ...
3
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1answer
28 views

LSTM for time series forcasting

I manipulate the time series using the different structures of the neural networks in order to make a prediction, and I wonder if there is a way to choose the parameters of the networks intelligently? ...
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1answer
105 views

Date and time extraction from Excel file in Python or Pandas

I have an Excel file with a column that contain both date and time in a single cells as follows: 2020-07-10T13:32:01+00:00 I'm wondering how to extract this cell, split date and time (that are ...
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1answer
27 views

Appropriate Machine Learning algorithm for modeling clustered time-varying binary outcome

I'll just dive right in. I have a decent-size (100K observations) dataset of time-varying continuous and categorical predictors. Categorical predictors, actually, usually do not change, however, ...
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31 views

Expected value based on periodical interval measurements

Suppose you want to measure a process that goes on/off every 100ms +- rand 3000ms. Your tools can do probes ones in >=1500ms. ...
0
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1answer
21 views

Get the average time between 1st and 2nd call (postgresql)

I have the following data in a table where I want to calculate the average time between 1st and 2nd call. I know how to get the average, but I have a tough time figuring out how to subtract the 2nd ...
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0answers
9 views

Tool for annotating video gestures

I'm looking for a tool for annotating gestures in a video. There are tons of tools for tracking objects in videos, but all I want to do is annotate when gestures start and end in a video, not where ...
1
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1answer
126 views

Help improving my “read_excel” execution time in python. My code reads slowly

My first question here so please bare with me. I'm trying to feed my neural network with training data read in from an excel file. It works perfectly fine when i have less than 50 rows in the sheet. ...
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0answers
15 views

Machine learning time intervall partition?

So I knew the basics of the ML, and now I would like to solve a task, but unfortunately I don't know how to approach, and what kind of algorithm should I looking for. I try to write the problem: The ...
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0answers
12 views

Standard(s) for data representing measurement times with their interval of validity?

Is there a standard for representing the time interval of a measurement? Any actual measurement is made at a point in time with, perhaps, an interval over which it is considered valid. For example, ...
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1answer
28 views

Classification with feature not available at time of model creation

I have problem statement to predict the probability of solving a task depending on multiple features for e.g. when the task was created, the time needed to work on a task, etc Please find a dummy ...
2
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1answer
92 views

In survival analysis, which is the correct way to introduce a variable which changes the survival rate but occurs at different times?

I am making a survival analysis with a cox regression with proportional hazards, we want to analyze wheter the introduction of a phenomenon influences the time until the death of an individual. A ...
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1answer
20k views

'list' object has no attribute 'values' when we are using append in python

Here I have a dataset with three inputs. Here I generated y value using append. After the append I got the output like this: y.append(rec.iloc[0]['y']) Then I ...
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136 views

Linear correlation and XGboost regression for time series

I am working with sales time-series data, I have a history of 9 years of monthly data. I am trying to forecast sales for the next 12 months. I am using XGboost regression to build multivariate time ...