Questions tagged [pattern-recognition]
The pattern-recognition tag has no usage guidance.
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Unclear points on projection type and selection of distance metric in feature extraction for a set of scenarios
The following is an example from a book (An Introduction to Pattern Recognition and Machine Learning by P. Fieguth, page 85) on feature extraction and selection. Please consider the following figure.
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Pattern recognition in time data serie
I have a log file with phone call data, described by 2 attributes: call_time, call_from. I want to discover some patterns in the data, using some statistical method. I don't have any predefined ...
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314
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Cluster URLs based on their pattern
I am new to clustering techniques and I highly value any input you can provide for my problem bellow.
Basically, I want to cluster URLs based on their structural patterns.
for example
cluster1 - ...
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pytesseract performance for digit recognition
The sequence in the following image
is correctly recognized by pytesseract via the usual function "pytesseract.image_to_string". But the following image with a similar sequence is not ...
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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 ...
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123
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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 ...
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9
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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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934
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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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13
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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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634
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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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66
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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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331
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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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56
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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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29
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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
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480
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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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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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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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1k
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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:
...
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22
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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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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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131
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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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305
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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 ...
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318
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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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373
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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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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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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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266
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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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133
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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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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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