# Questions tagged [numerical]

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6answers
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### Encoding features like month and hour as categorial or numeric?

Is it better to encode features like month and hour as factor or numeric in a machine learning model? On the one hand, I feel numeric encoding might be reasonable, because time is a forward ...
3answers
6k views

### How can I dynamically distinguish between categorical data and numerical data?

I know someone who is working on a project that involves ingesting files of data without regard to the columns or data types. The task is to take a file with any number of columns and various data ...
1answer
1k views

### How to estimate the mutual information numerically?

Suppose I have a sample {$z_i$}$_{i\in[0,N]}$ = {($x_i,y_i$)}$_{i\in[0,N]}$ which commes from a probability distribution $p_z(z)$. How can I use it to estimate the mutual information between X and Y ? ...
1answer
1k views

### Do numerical inaccuracies play any role in training neural networks?

Are there publications which mention numerical problems in neural network optimization? (Blog posts, articles, workshop notes, lecture notes, books - anything?) Background of the question I've ...
1answer
183 views

### Steps in exploratory methods for mild-sized data with mixed categorical and numerical values?

Experienced in signal/image analysis, and new to data science, I recently was challenged with a relatively simple dataset: 100 to 200 items, about 10-20 numerical variables (in the [0-1] or percentage ...
1answer
30 views

### 5 digit number mis-reads analysis

Nothing to do with number recognition in the classical 'hand-written' sense Disclaimer above to avoid this being counted as a repeat. I have a selection of 96 serial numbers, and a separate ...
3answers
1k views

### Purpose of converting continuous data to categorical data

I was reading through a notebook tutorial working with the Titanic dataset, linked here, and noticed that they highly favored ordinal data to continuous data. For example, they converted both the Age ...
0answers
1k views

### How to choose the optimal k in k-protoypes?

To analyze a dataset from banking I have both numerical and categorical values. I transform them to analyze with k-prototypes. The original dataset: The modified dataset: E.g.: Job (for 1 to 12 '...
2answers
95 views

### Homemade deep learning library: numerical issue with relu activation

For the sake of learning the finer details of a deep learning neural network, I have coded my own library with everything (optimizer, layers, activations, cost function) homemade. It seems to work ...
1answer
21 views

### partial numerical array - pattern matching

I have a linear numerical array source and I want to find/match test array as pattern : ...
1answer
32 views

### What is the intuition behind using Monte Carlo to solve a differential equation

Conceptually, I understand how a numerical method like Monte Carlo is used to solve a definite integral. Because integral of a function is the area bounded by the curve, the ratio of random points ...
1answer
8k views

### Replacing words by numbers in multiple columns of a data frame in R

I want to replace the values in a data set (sample in the picture) using numbers instead of words, e.g., 1 instead of D, ...
0answers
16 views

### How to do non arithmetic operation in python 3 [closed]

lets say a=3 b=4 and c is an unknown constant. a=3 b=4 F=0 F=a*b*c print(F) Its an error. I want 12*c or 12c
0answers
125 views

### Association Categorical Variables

We Perform data Analysis and build Models say for example I have builted Linear Regression Model having More than one Predictor ( Multiple Regression). We check so many things Normality ...
1answer
498 views

### Convert nominal to numeric variables?

I am trying to develeop an algorithm with sklearn and Tensorflow to predict which car can be offer to each customer. To do that I have a database with the answers of one survey to 1000 customers. An ...
1answer
3k views

### MinMaxScaler returned values greater than one

Basically I was looking for a normalization function part of sklearn, which is useful later for logistic regression. Since I have negative values, I chose MinMaxScaler with: ...
0answers
10 views

### Is there a way we can narrow down the best range describing a dataset (other than IQR and Min-max)?

I have a dataset of the prices of products for different categories. I want to get the best range which can describe the prices of that category using the Product Data. I have already applied IQR and ...
0answers
94 views

### Cluster method with binary variable

I need to do a cluster analysis for the following variables: ...
1answer
456 views

### What are the advantages or disadvantages of Owl?

Owl is the numerical library for OCaml: https://github.com/ryanrhymes/owl It is supposed to be an equivalent of numpy and also have capabilities of tensorflow. Any insights on why it should be used ...