Questions tagged [pattern-recognition]

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Selection of learning rate parameter for perceptron

I have a project where I should implement perceptron in Matlab. I can select any vector Wo that does not classify the 2 classes correctly. But when it comes to the learning rate parameter, I have to ...
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Finding illustrative patterns in data

I am an engineering student and new to data science. For my Bachelorthesis, I am evaluating how precise different algorithms for computing an upper bound on the global Lipschitz constant of a neural ...
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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 ...
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Search one 2D distribution for point cluster most similar to another 2D distribution

Given a hand drawn constellation (2d distribution of points) and a map of all stars, how would you find the actual star distribution most similar to the drawn distribution? If it's helpful, suppose we ...
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Is there a Solution Manual for Introduction to Statistical Pattern Recognition Book by Keinosuke Fukunaga?

I'm looking for a solution manual for Introduction to Statistical Pattern Recognition Book by Keinosuke Fukunaga ? I couldn't find anything on the internet . If you have any solution manual by ...
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Identify the existence of a wall like structure in a given int array

The idea is that I will query an API endpoint which will return me an array consisting of a price value and a quantity value [price, quantity]. In this dataset ...
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Approach for finding patterns in daily event data

I am software engineer but have zero data science background, so apologies for this basic question. I would like to find correlations between different behaviors of my daily life and different ...
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How to recognize this type of pattern in my data?

I have this question that is just bugging my mind and I can't find an actual solution to it online. I have a certain pattern I would like to detect in my data, like the example I have in my picture, ...
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Graph Pattern Matching Library

Assume that in an application, the user gives us a graph and we want to consider it as a pattern and find all occurrences of the pattern in a graph database (like neo4j). If we knew what the pattern ...
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How can I correctly identify an item within a larger image, but also detect if the item is the correct orientation?

I have some machinery at work with a small sticker I am trying to detect within a larger image. I am familiar with object detection techniques based on a trained classification model, but to further ...
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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 in a single image. For example, an arbitrary smaller image might be pasted at random locations in the image. In ...
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2 answers
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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 ...
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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 ...
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2 answers
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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,...
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I have a data set of optimal values after simulations, How can I find if this dataset follows a specific pattern or any relation exists?

In the simulation I am conducting, I have a set of triangles and I select the optimal triangle based on my metric. After every simulation, I obtain an optimal triangle and I note down the lengths of ...
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Avoiding overfitting in unsupervised ML

I am using a unsupervised pattern matching approach to create a trade strategy. I use the output of the pattern matched results to decide whether to enter a trade or not. For deciding the best pattern ...
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2 answers
174 views

How to identify patterns in dataset [closed]

I have a dataset that pertains to calls received to a hospital emergency helpline. My task is to identify patterns in the data. How do I approach examining the dataset to identify patterns? Extract ...
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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 ...
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1 answer
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Finding a pattern in reponses in R programming [closed]

I did a study in which around 1000 participants took a test (100 questions). In this study participants were asked in each question to choose between two texts (text 1 and text 2) and decide which ...
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Direct Discriminative Pattern Mining for Effective Classification - implementation

I'm looking for any actual working code implementation of the DDPMiner algorithm mentioned in the Direct Discriminative Pattern Mining for Effective Classification article form 2008 I'm having real ...
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1 answer
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Help with DDP Mining algorithm for Effective Classification of data sets from 2 groups

I'm trying to implement the DDPmine algorithm from this article as part of some project, and I do not understand where in the algorithm we use the Class Label of each transaction? We have transactions ...
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LDA-like algorithm but at the character level?

I have a catalog of products and I'd like to find "topics" in their description. The problem is that you might find in the description things like GraphicsCardVendor10.2 ...
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3 votes
2 answers
577 views

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: ...
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Extracting patterns from the spatiotemporal movement of objects

Say I have a database with x and y coordinates (30 times per second) for some objects in a 2d plane. Is there a way to extract patterns from these coordinates? If so, is there a way to visualize these ...
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2 votes
1 answer
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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 ...
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Machine learning algorithms for Geometrical objects shapes identification

Are there Machine learning algorithms which will take input dataset of all geometrical objects shapes as images in gif,jpg,tiff formats & output the geometrical shapes names? i.e. Geometrical ...
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2 votes
2 answers
155 views

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 ...
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1 vote
1 answer
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Similar algorithm to apriori to find unpopular sequential patterns

I am working with a dataset that looks like similar to this one but it is way larger (approx. 30.000 arrays): ...
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1 vote
1 answer
293 views

Simple Binary Classification Example in Python

I'm not sure the correct place to ask, but I'm trying to develop a simple function/algorithm that outputs a predicted number from a sequence of numbers (I have a background in Python, but little to no ...
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1 answer
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Find the time between two events by customer id [closed]

I need to find a customer has bought P1, and after how many days customer will buy P2. I am unable to find the days between order of P1 and the next order of P2 by the same customer. I have data as ...
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1 vote
0 answers
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Advanced frequent pattern identification

I have some dictionary data like this: ...
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2 votes
1 answer
117 views

Python dataframe iterate over rows

Dataset ...
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2 votes
2 answers
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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 ...
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Root cause analysis using Machine Learning or NN

I am trying to build a predictive model that will analyze pattern from a snapshot file (log) and give the root cause analysis of the file i.e the class to which the pattern in the logs belongs to. I ...
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3 votes
1 answer
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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 ...
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3 answers
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Predict Data Linking

I've two different datasets A(x1, x2, x3...xn) and B(y1, y2, y3...yn). Each instance in A is linked with an instance in B i.e. only one unique pair exists. ...
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