Questions tagged [pattern-recognition]
Refers to techniques for classifying data into categories based on similarities (which can either be known previously, or learned).
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How to use and understand entropy for pattern detection?
I have two images from erp_data and noerp_data matricies. In erp_data we can see a pattern (sigmoid), in no_erp we see no pattern. ERP is event-related potential, if you are curious.
My goal is to ...
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How to identify patterns/associations in a multiple choice question towards another variable?
I have a dataset where with two questions. Question 1 is a multiple-choice question and asks the participants which treatment they took. E.g., treatment A, treatment B, treatment C etc.
Question 2 ...
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Find pattern in vector data
I have two groups of vectors A = [[0 0 0 0 1], [0 0 0 1 0], …] and B = [[0 0 1 0 1], [0 1 0 0 1], …].
I want to find the pattern that differentiates the vectors in A from the vectors in B. How to do ...
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Looking to extract patterns from sequences of codes
I have the following problem: I have a registration of people who enter a building, I have the name, entry date and end date. I also have the times at which events occur inside the building.
I want to ...
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Dependent and independent variable in PLS regression for sensor array data
I have been using PCA for the pattern recognition of my gas sensor array data. But recently decided to use PLS using OriginPro software. My sensor array data consists of responses coming from 8-10 ...
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choosing the number of clips generated arround the selected temporal position?
in the article Learning Spatio-Temporal Features with 3D Residual Networks
for Action Recognition, it says that for choosing the samples for training from videos:
We first select temporal positions ...
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GLM: invalid value encountered in log special.gammaln
I've never used GLM before so I would like to have some hints on how to use it and if I'm missing any steps.
My challenge:
I want to know if the price of product is influenced, positively or ...
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How to use ML or DL for predicting a value given a pattern
So, I have a folder named Cycles in which I have multiple (say 1000) csv files. Each of this csv file has four parameters and how they vary with time from t=0 to t=900. For more clarity, each csv file ...
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Minimizing the expected loss (PRML)
In Bishop's PRML in section 1.5.2, the author introduces a loss function for classification, which is the expected loss,
$$
E[L]=\sum_k \sum_j \int_{R_j} L_{kj}p(\textbf{x},C_k)d\text{x}
$$
where Lkj ...
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Identifying groups/patterns in a random dataset using Matlab [closed]
I have the datasets which may contain multiple patterns. The data needs to be classified based on grouping in the data. The figure below shows an example of the data. The circles around the data are ...
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In a specifically ordered set of binary data (ones and zeros), how can you organize them in patterns and from there build a probabilistic network? [duplicate]
So I have a set of 1s and 0s. They are listed in a column on excel. They are listed in a specific order. I do not wish to change their order.
So they appear as (1, 0, 1, 0, 0, 1 and so on... 0).
Here ...
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Prove that Residuals/Errors are not Predictable [duplicate]
Let's say I have a set of data and I modelled it using an ML algorithm. After I fit multiple models I achieve a certain level of accuracy. It doesn't get better beyond that point.
I want to prove ...
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From the book "Bishop- Pattern Recognition and Machine Learning" Page 31 [closed]
From the book "Bishop- Pattern Recognition and Machine Learning" Page 31. Can you help me derive the equation (1.68) from equations (1.69), (1.70) and (1.71).
Please explain every step for ...
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ICA and Gaussian: a misleading example
A book reports that ICA cannot be used if the independent components of the analyzed data are Gaussian (at most one can be Gaussian, but no other). However, in the same book, the following example is ...
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Detect quoted text in emails
I have small dataset (<10k) of emails (plaintext) that need to be classified. Currently I'm doing research on topic of email preprocessing and I can't find any suitable solution for quoted text ...
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