bayes | Naive-Bayes Classifier for node.js | Natural Language Processing library
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kandi X-RAY | bayes Summary
bayes takes a document (piece of text), and tells you what category that document belongs to.
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bayes Examples and Code Snippets
def main():
"""
Gaussian Naive Bayes Example using sklearn function.
Iris type dataset is used to demonstrate algorithm.
"""
# Load Iris dataset
iris = load_iris()
# Split dataset into train and test data
X = iris["
Community Discussions
Trending Discussions on bayes
QUESTION
I'm running several machine learning models to find the one which the highest accuracy score, however, all the accuracy scores are the exact same. I performed NLP on social media text and I'm training my models to tag sentiment based on sentiment determined from NLTK.
I'm using the same training and test sets, but I've done this method before in the past and received different scores on different models. Why are all of mine the same? Am I overfitting perhaps?
Here is my code where I'm splitting and training:
...ANSWER
Answered 2021-Jun-08 at 00:47I'm not sure what is the cause of the problem, but since the output of you SVM model and DecisionTreeClassfier always output 1, I suggest you try a more complex model like RandomForestClassifier and see what it comes out.
I've similar experience before, no matter how I tuned the training hyperparameters, the model always give the same performance metric -- this may cause by 2 probabilities:
- Our data is not suitable for the model, for example all values in the vector is zero: [0, 0, 0, 0, 0, 0, 0]
- Our model is too simple, which could only perform linear modeling, so that it could not learn too complex mapping function.
Since your SVM is built with linear kernel, could you try an more complex model and see what it comes out? And could you examine that if your X_train_vectors is all zero's in the matrix?
QUESTION
I want to use an HTML select element to change which thymeleaf fragment is displayed.
the html code:
...ANSWER
Answered 2021-May-19 at 12:20Thymeleaf renders the HTML on the server side. Once the HTML is in the browser, Thymeleaf is no longer "active".
What you can do is insert the
So your Thymeleaf template has:
QUESTION
I am trying to get the second last value in each row of a data frame, meaning the first job a person has had. (Job1_latest is the most recent job and people had a different number of jobs in the past and I want to get the first one). I managed to get the last value per row with the code below:
first_job <- function(x) tail(x[!is.na(x)], 1)
first_job <- apply(data, 1, first_job)
...ANSWER
Answered 2021-May-11 at 13:56You can get the value which is next to last non-NA value.
QUESTION
I am trying to using a "for" to create a set and then apply another for that will interate and generate a dict. But its is returning "error"
Some important details:
test_tabela
is a list
ANSWER
Answered 2021-May-14 at 00:43i
is an element of tested_tabela
, because of that, change
QUESTION
I am currently using the R package ParBayesianOptimization
to tune parameters for ML methods. While searching for an optimal cost
parameter for the svmLinear2
model (contained in caret
), the optimization stopped with a sudden error after successfully completing 15 iterations.
Here is the error traceback:
...ANSWER
Answered 2021-May-10 at 20:28It appears that the scoring function returned NA
s in place of accuracy measures leading to the error later downstream. This has been described by the library's creator at
https://github.com/AnotherSamWilson/ParBayesianOptimization/issues/33.
It looks like the SVM is trying a cost
of 0
during the 9th iteration. Given the problem statement the SVM is solving the cost
parameter should probably be positive.
According to AnotherSamWilson, this error may commonly occur when the scoring function "returns something unexpected".
QUESTION
I am trying to define a toy probabilistic programming language to test various inference algorithms and their effectiveness. I followed this tutorial to create a Scheme like language with a basic structure. Now I want to use the monad-bayes library to add the probabilistic backend. My end goal is to support sampling from and observing from distributions. This is the definition of my expressions
...ANSWER
Answered 2021-May-04 at 22:03A data declaration needs to use concrete types, but MonadSample
is a constraint. It describes behaviors instead of implementations. From hackage, one instance of MonadSample is SamplerIO
which you can use in your data declaration. e.g.
QUESTION
I'm working on an NLP project for automatic text classification. Here is a snippet of a code to constitute a primitive bag of words from an XML file. But my question is as follows: in this sequence, is it possible to one-line these 3 lines because i don't really enjoy the empty declaration of %lemma_words
...ANSWER
Answered 2021-May-03 at 07:05Can roll it in a subroutine ... or use the ones provided in libraries
For simple and fast element-frequency counter there is List::MoreUtils::frequency
QUESTION
I have a dataset upon which I would like to implement the Naïve Bayes algorithm but it is triggering an error on line 107; str_column_to_float(dataset, i) as follows; "could not convert string to float:''" I thought it was because of the headers for the various columns but even after I removed them and run the code, it is still giving me the same error. Any help will very much be appreciated. The link to the dataset is as follows; [Dataset][1] The code is below
...ANSWER
Answered 2021-May-02 at 01:19The ValueError is being raised because float() is trying to cast a word to a string.
QUESTION
Imagining I have a data set, whose feature values are continuous, and there are more than two possible labels (eg: rain, sunny, windy etc), which naive bayes model should I implement in sklearn?
I am thinking about Gaussian or Multinomial. However, multinomial works for discrete features, and I tried gaussian, but it turns out that the accuracy of the prediction is like random selecting.
Thanks for helping, Yige
...ANSWER
Answered 2021-Apr-26 at 21:41Naive Bayes Classification (NBC) works with discrete values. That means you have to discretize all features which are continuous. For more details, this could help
Anyways, multinominal is correct because you have more than one label. But you should also keep in mind that you have to one-hot encode your labels (OneHotEncoder in sklearn).
QUESTION
I want to build a naive bayes model using two dataframes (test dataframe, train dataframe)
The dataframe contains 13 columns, but I just want to encode the dataframe from str
to int
value in just 5-6 columns. How can I do that with one code so that 6 columns can directly be encoded, I follow this answer:
ANSWER
Answered 2021-Apr-26 at 07:49You can loop through the columns and fit_transform
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