Questions tagged [representation]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
15 views

What are the sparse and dense vector ? I cant undestand ,can you explain to me?please.Why do we use for?

I am new to neural networks, embeddings, etc. I am struggling understanding things like sparse representation, embeddings, and especially sparse vectors. Could you explain these to me? Why do we need ...
0
votes
1answer
20 views

Representing user information

I have a task of representing a users feature matrix , i have features like gender , age etc but I also have a multivalue feature called as "movies watched" which is essentially another table of ...
0
votes
0answers
11 views

Standard(s) for data representing measurement times with their interval of validity?

Is there a standard for representing the time interval of a measurement? Any actual measurement is made at a point in time with, perhaps, an interval over which it is considered valid. For example, ...
1
vote
2answers
22 views

Difference between n-dimensional of length m and m-dimensional of length n?

With respect to classifying the MNIST digits I've seen the input representation referred to as both a one-dimensional array of 748 elements and a 784-dimensional vector. Are these perspectives always ...
0
votes
1answer
75 views

PCA, why variance of eigen values is measure of its utility?

Source - Murphy, 12.3 Heuristic for assessing applicability of PCA. Let the empirical covariance matrix Σ have eigenvalues λ1≥λ2≥···≥λd>0, with mean λ. Explain why the variance of the eigen values, ...
5
votes
0answers
93 views

Are there any graph embedding algorithms like this already?

I wrote an algorithm for generating node embeddings based on the graph's topology. Most of the explanation is done in the readme file and the examples. The question is: Am I reinventing the wheel? ...
0
votes
1answer
14 views

Membership ratio graph

Does anyone know how the what the kind of graph in this image is called? Each color represents a class and the height of the color, in a particular instant, represents the ratio of elements that ...
0
votes
0answers
14 views

Dense Representation of Proportions Data?

My question is about data representation, but let me first provide a brief description of my application. I have a workload and am executing it on several different machines. Each machine has a ...
0
votes
0answers
192 views

AUC evaluation for link prediction on node2Vec

I am trying to reproduce the link prediction results for the node2vec framework (Section 4.7: https://cs.stanford.edu/~jure/pubs/node2vec-kdd16.pdf). The paper talks about generating edge embedding ...
0
votes
1answer
31 views

Change the number of decimal places in a variable

My decision trees have value labels with way too many decimal places. How can I reduce the number of decimal places to ~2? Thanks, Dan
0
votes
2answers
43 views

Is there any option to represent 160 discrete variables each one with their own color in scatter plot?

Good morning, I want to know if it is possible to represent with different colors in scatter plot more than 10 parameters instead of putting others and assign a color if the amount of parameters ...
2
votes
1answer
243 views

What does 'Linear regularities among words' mean?

Context: In the paper "Efficient Estimation of Word Representations in Vector Space" by T. Mikolov et al., the authors make use of the phrase: 'Linear regularities among words'. What does that mean ...
1
vote
0answers
18 views

Daily-level variables and weekly-level variables at the same model

I am running a model which has NPS (Net Promoter Score) as its target and various predictors among which some CSAT (Customer Satisfaction) data. The rest of the predictors are good to use at daily ...
3
votes
1answer
232 views

Why ELMo's word embedding can represent the word better than glove?

I have read the code of ELMo: https://github.com/allenai/bilm-tf Based on my understanding, ELMo first init an word embedding matrix A for all the word and then ...
1
vote
1answer
58 views

How to deal with Optional Input

I'm from the vision world and only worked with pixels from 0-255, ignoring any side effects. My current problem is different, in the way that I cannot rely on the input data. What my problem is: I ...
0
votes
1answer
485 views

faster alternatives to sparse.model.matrix?

I have a large dataset that is entirely categorical. I'm trying to train with it using xgboost, so I must first convert this categorical data to numerical. So far I've been using sparse.model.matrix() ...
2
votes
1answer
60 views

Learning Football Player Stats like FIFA's by only the game result [closed]

It is a general question on how to learning representation of one entity but the dataset is mixed with a lot of other entities, which their statis are always waiting to be learnt. The question is ...
1
vote
1answer
385 views

Neural Nets: unordered sets of ordered tuples as features of data

I'm working on a very small scale pet project in which inputs are essentially sets of (x, y) pairs, and are to be classified into categories, using deep learning, specifically using Keras (I know this ...
0
votes
1answer
329 views

How to learn from multiple data sources with different input variables but the same underlying pattern?

I will explain with an example: Let's say you have 2 factories that produce pulp paper. Each have similar processes where the laws of physics give the same outcome. Now let's say this 2 factories ...
5
votes
2answers
9k views

Why don't tree ensembles require one-hot-encoding?

I know that models such as random forest and boosted trees don't require one-hot encoding for predictor levels, but I don't really get why. If the tree is making a split in the feature space, then isn'...