Questions tagged [pattern-recognition]
The pattern-recognition tag has no usage guidance.
44
questions
0
votes
0
answers
7
views
Performance Issues with Large Dataset for Frequent Itemsets Mining
I’m working on a data mining project, specifically focusing on mining frequent itemsets. My dataset contains 175 unique items and 1400 transactions, but I’m encountering significant performance issues ...
0
votes
0
answers
19
views
Unsupervised detection and counting of a pattern in a time signal without pre knowledge
I'm facing a problem and it seems I can't find a working solution since a few years.
TLDR : Is there a well-known algorithm or NN-model that is able to autodetect and count patterns in a time signal ...
- 1
1
vote
1
answer
15
views
Identify percentage area for each color
I have a set of images like that bellow and I need to identify the the percentage area for each color of column. Some images has the number writed, others doesn't, but I don't need OCR. I really need ...
- 115
0
votes
0
answers
7
views
How to Identify Equipment Churn from Laboratory Service Records Without Direct Churn Labels?
I'm analyzing a dataset encompassing 20 years of laboratory equipment service records, which includes the equipment ID, service dates, types of equipment (HOOD_TYPE), and descriptions of performed ...
- 1
0
votes
0
answers
24
views
How to write correctly a multiclass perceptron
I am learning Pattern Recognition and Machine Learning and I was required to write a multiclass perceptron like this:
there are vectors: ...
- 101
0
votes
0
answers
29
views
How can I detect patterns in a csv of numeric values with a success failure indicator?
Hello everyone I have a need and I would like help to identify the technological approach, I tentatively consider that I need unsupervised ml for the following: I have a data dataset about investment ...
0
votes
1
answer
67
views
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.
...
0
votes
0
answers
18
views
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 ...
- 101
1
vote
1
answer
623
views
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 - ...
- 111
2
votes
1
answer
284
views
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 ...
- 21
2
votes
1
answer
153
views
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 ...
- 21
1
vote
0
answers
9
views
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 ...
- 11
3
votes
2
answers
2k
views
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 ...
- 131
0
votes
0
answers
13
views
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 ...
- 1
1
vote
0
answers
22
views
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 ...
- 111
1
vote
0
answers
14
views
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, ...
- 11
1
vote
0
answers
51
views
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 ...
- 111
0
votes
1
answer
37
views
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 ...
- 121
2
votes
0
answers
1k
views
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 ...
- 123
2
votes
2
answers
122
views
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 ...
- 131
1
vote
2
answers
490
views
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 ...
- 11
1
vote
2
answers
58
views
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,...
- 19
1
vote
0
answers
33
views
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 ...
0
votes
1
answer
33
views
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 ...
1
vote
2
answers
599
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 ...
- 79
2
votes
1
answer
25
views
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 ...
- 121
1
vote
1
answer
74
views
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 ...
-1
votes
0
answers
35
views
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 ...
- 109
1
vote
1
answer
34
views
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 ...
- 109
-1
votes
0
answers
19
views
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 ...
- 169
3
votes
2
answers
2k
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:
...
- 31
0
votes
1
answer
22
views
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 ...
- 31
2
votes
1
answer
3k
views
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 ...
- 23
0
votes
1
answer
224
views
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 ...
- 169
3
votes
2
answers
372
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 ...
user98969
1
vote
1
answer
368
views
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):
...
- 113
1
vote
1
answer
406
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 ...
- 111
0
votes
1
answer
32
views
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 ...
1
vote
0
answers
31
views
2
votes
1
answer
193
views
2
votes
2
answers
51
views
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 ...
- 61
1
vote
0
answers
284
views
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 ...
3
votes
1
answer
217
views
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
...
- 465
-1
votes
3
answers
66
views
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.
...
