Data Science Stack Exchange
Data Science Stack Exchange

Questions tagged [pattern-recognition]

41 questions
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Find repeating patterns in data

I have database of sequential events for multiple animals. The events are represented by integers so it looks something like: Animal A: [1,6,4,2,5,7,8] Animal B: [1,6,5,4,1,6,7] Animal C: [5,4,2,1,6,4,3] I can manually see that for each event 6…
Bram
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Learn (common) grammar / pattern from set of sample strings?

So I currently have a text pattern detection challenge to solve at work. I am trying to make an outlier detection algorithm for a database, for string columns. For example let's say I have the following list of strings: ["abc123", "jkj577",…
user98969
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Is pattern recognition the same as unsupervised learning? Is machine learning the same as supervised learning?

Firstly, here is the definition of a well-posed learning problem: A computer program is said to learn from experience E with respect to some task T and some performance measure P, if its performance on T, as measured by P, improves with…
Data
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How to find common patterns in thousands of strings?

I don't want to find "abc" in strings ["kkkabczzz", "shdirabckai"] Not like that. But bigger patterns like this: If I have to _________, then I will ___. ["If I have to do it, then I will do it right.", "Even if I have to make it, I will not make it…
Mohit Gangrade
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What algorithms exist for identify repeating patterns in a single image?

I am looking for algorithms or models for detecting and identifying repeated patterns contained within a single image. For example, an arbitrary smaller image might be pasted at random locations in the image. In the situation at hand, no prior…
dannycbus
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Detecting synchronization cascades in time series

I am researching delayed synchronisation in a system of coupled oscillators. There is a one-way causal connection between the oscillators, which leads to the synchronisation events occurring in a rough sequence. When I plot this data a very clear…
derfred
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Subsequence parttern matching for time series

I have a set of time series data (just like voice sequence data) with the pattern as shown in the first figure (theoretical data). The measured data is given as presented in the second figure. What I want to do is localizing/finding the subsequent…
Land
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Python dataframe iterate over rows

Dataset **Col1** **Col2** **Col3** dog Z st02 dog,cat Z st02 dog,bat,cat …
omdurg
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Which algorithm to use to identify clusters with a similar value?

Here, an example of my problem: 10000 observations of people with several features [age, gender, region, number of sons, ...] and a value to predict "income". There is not a general relationship between features and income, therefore a normal…
A M
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How to deal with many unlabeled data in an object detection dataset

I've a large multi-class object detection image dataset. The goal is to use a Yolo(v11) model to be trained on the aforementioned dataset to solve the object detection task. My intuition says that the presence of unlabeled class instances degrades…
Ramiro Hum-Sah
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What is the fastest way to detect periodicity in a binary time series?

Example, T = array([0,1,1,1,0,0,1,0,1,1,1,0,0,1,1,1,1,1,0,0,1,0,1,1,1,0,0,1,0,1,1,0,0,0,1,0,1,1,1,0,0,1]) ( T is almost a repeat of the array([0,1,1,1,0,0,1]) six times ) I say almost because it is not perfect. I have hundreds of thousands of…
Imp
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Compare importance/data pattern between multivariate time series

I have the simple multivariate time series looks like this, Each column could be plotted in line chart as below, My problem statement is about is there any algorithm or machine learning to prioritize three columns based on data or charts weekly?…
Max
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Extracting linear trends from a dataset

Consider a sensor measurement f that varies with both temperature T and the properties of the fluid being measured. The temperature changes through each day and the fluid properties can be assumed to vary less frequently. If I cross plot the data in…
Tunneller
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Identifying patterns in tabular data

I have a set of tables containing some thousand entries and some tenths of columns from machine status values of production. The entries are of mixed types like string, float, or timestamp. Each table is pre-labeled with a certain failure mode (e.g.…
Bernhard
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Correlation/Pattern Recognition in Lists

I am looking for algorithms to find pattern or more precise correlations in lists compared to an Output. Let us assume I have a Database like this: Input: [A,C,D,E...], Output: Positive Input: [A,B,C,E,F...], Output: Negative The Problem is that…
can.inan
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