Questions tagged [mathematics]
Mathematics in a data science or machine learning context refers to the mathematical underpinnings for algorithms, optimization, statistics, and linear algebra etc.
231 questions
0 votes
0 answers
29 views
Repeated Measures Correlation Question
I am currently using repeated measures correlation to calculate the correlation between 2 variables in repeated measures data link to paper On the paper, equation 4 denotes how repeated measures ...
5 votes
1 answer
94 views
How to normalize bounding box sizes in perspective transform for objects at different distances from the camera
I’m working on an object detection system and I'm new to this field. Here i'm talking with respect to camera point of view. When a object is detected which is far from the camera, it appears small and ...
2 votes
0 answers
50 views
Reducing loss of multiclass classication problem
I have been reading a paper in which they theoretically showed existence of a Neural network model that can perform a algorithm which involves selection of stencils with 100% accuracy. So they ...
- 31
3 votes
1 answer
101 views
Looking for a better way to calculate positive rate of combinations' sum
Suppose you have a list of float numbers with a size of 10, and you choose 5 numbers out of such list and sum them up to form a new number, generating all possible combinations now you have a new list ...
- 143
2 votes
0 answers
53 views
Effect of objective function's Hessian's condition number on learning rate in Gradient Descent
I'm following Ian Goodfellow et al. book titled Deep Learning, and in Chapter 4 - Numerical Computation, page 87, he mentions that by utilising second order Taylor approximation of the objective ...
- 121
2 votes
0 answers
40 views
Why might transforming my features improve the performance on a simple decision tree?
The features & target in my dataset are very skewed. Could anyone explain why transforming the features & target (I'm using a Yeo-Johnson transformation) is significantly improving the ...
- 21
3 votes
1 answer
113 views
How to analyze time series data and create time series model in Python?
I am trying to understand time-series data and model. In youtube tutorial and others, mostly univariate examples are shown. And they are applicable or suitable for those conditions. What if our ...
- 33
2 votes
1 answer
47 views
Does performing k-NN on the centroids of clusters obtained from k-means make sense mathematically?
While playing around with some text embeddings, I used k-means clustering to get 4 clusters. I also have the labels for these embeddings, and I may simply use k-NN to classify new embeddings. However, ...
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