# Questions tagged [automatic-algorithms]

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### Statistical/Automated method for identifying a dataset suitable for Machine Learning Modelling

Given a folder which has 10k Excel files, the objective is to identify the datasets suitable for Machine Learning Modelling Approach. We use a script right now which performs this operation and call ...
• 101
35 views

### Extract coefficients from ordered logistic regression models when there are several exposures and outcomes

I'm trying to extract intercepts from a lot of ordered logistic regression models with different exposures and outcomes. In the end I would like a file with the name of my independent variable, ...
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19 views

### Comparing quality of automatically labeled data

I have two algorithms for automatically labeling data for a computer vision task. The dataset is large, and it's not feasible to inspect visually. Can I determine which labeling is higher quality ...
• 176
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### Automated model selection functions in statistics

I am aware of auto.arima() in R for the automatic selection of a seasonal ARIMA (time series) model in R and functions such as leaps() in R that do automatic best subset feature selection in linear ...
25 views

### Is it possible to create a general forecast model working on several data sets?

I am working on a project, where the task is to create forecast models that can be used on a wide variaty of data sets. Some of which are stationary and some which aren't. Both ARIMA and Exponential ...
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### Which ICC model to use for computer vs. human agreement

I have an agreement study with the following basic construction: ~ 400 items are rated by (1) a computer algorithm, and (2) a human rater. The ratings are on a continuous scale. I would like to ...
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27 views

### Automated Normalization?

The most widely used statistical techniques assume a normal distribution for inputs. The most widely used normalization procedures take a: square root (assuming polynomial distribution), log (...
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1 vote
116 views

### Data Dredging or valid?

Hi Cross Validated community, I have been reading answers posted previously on the topic of automated model selection and whether it is data dredging. This has led me to doubting the validity of my ...
1k views

### What is an appropriate amount of data to take in a moving average?

For instance, lets say I have 10,000 data points to work with for a single plot of data. I want to smooth this data using a moving average and I want this to be automated (I have already written the ...
825 views

### Automatic threshold selection for POT analysis

I have got > 100 river daily flow time series and I need to select a threshold for each of them in order to perform a Peak Over Threshold extreme value analysis. I know that I can select a threshold ...
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2k views

### Error in ARIMA function in R [closed]

I am analyzing time series data with 'Arima' function in R. As you know, to find optimum model, I have tried lots of cases. But, I am tired of finding and ...
2k views

### Automated forecasting of 1000 weekly time series (food product retail)

I have a set of 1000 time series with weekly data. These time series data are concerning the sales of food product retail. Can anyone suggest me the best/correct way to make good forecasts of this set ...
• 101
631 views

### General-to-specific subset selection ("Autometrics") performing well in macroeconomics

I wonder why general-to-specific (GETS) subset selection and particularly the Autometrics algorithm are performing well in macroeconomic modelling/forecasting. How does Autometrics work? Doornik "...
• 56.4k
1 vote
35 views

### Validating regression - common and best practice

Is there a reference setting out a best practice way to validate a regression (such as Lasso, but in general any automated regression), and what is done in practice? My motivation for the question is ...
• 161
948 views

### How does TextRank differentiate between keywords and simply frequent words, such as "is"

I am trying to understand how TextRank document summary algorithm works. A few articles that I've read so far introduce text rank as a modification of page rank (e.g. article in wikipedia). However, ...
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90 views

### Algorithm to determine a point in time series data, after which probability of increase in value is very low

I am working with dataset which contains number of movie tickets sold per day. This is basically a count of total number of tickets sold, for a particular movie, for each day after its release date. I ...
993 views

### Can we identify ARIMA model without looking at ACF and PACF plot?

Can we identify ARIMA($p,d,q$) model without looking at the ACF and PACF plots? I am trying to write a generalized R programme for fitting time series models. We may find out the orders $p$, $d$ and \$...
6k views

### Frequency parameter and its impact on auto.arima results

auto.arima returns two different models weather I define my time series with frequency=1 (default value) or ...
• 452
3k views

### Automated multi-product demand forecasting

I am looking for references regarding the forecasting of the demand for multiple products in an automated manner (no human intervention). Specifically, I have a number of clustered products for which ...
• 701
3k views

### Is automated machine learning a dream?

As I discover machine learning I see different interesting techniques such as: automatically tune algorithms with techniques such as grid search, get more ...
38 views

### How to find a meaningul threshold for relevant elements?

Is there any basic rule on which elements are over a certain threshold (and thus being important for further inspection) and which are below? Or can I set a "random" threshold just as I find it ...
15k views

### Are models identified by auto.arima() parsimonious?

I have been trying to learn and apply ARIMA models. I have been reading an excellent text on ARIMA by Pankratz - Forecasting with Univariate Box - Jenkins Models: Concepts and Cases. In the text the ...
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9k views

### auto.arima from Forecast package

I am trying to fit a time series using the function auto.arima and I face some strange results. As a first try, I use the command ...
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