Recent questions tagged machine

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machine learning - How do you use Keras LeakyReLU in Python?

I am trying to produce a CNN using Keras, and wrote the following code: batch_size = 64 epochs = 20 ... use LeakyReLU in this example? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Calculate Precision and Recall

I am really confused about how to calculate Precision and Recall in Supervised machine learning algorithm using NB ... help me.. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Python keras how to change the size of input after convolution layer into lstm layer

I have a problem with the connection between convolution layer and lstm layer. The data is of shape(75,5) where there is ... (None, 1, 75, 5) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How to build a Language model using LSTM that assigns probability of occurence for a given sentence

Currently, I am using Trigram to do this. It assigns the probability of occurrence for a given sentence. ... occurrence for a given sentence? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Binary features and Locality Sensitive Hashing (LSH)

I am studying FLANN, a library for approximate nearest neighbors search. For the LSH method they represent an ... for each feature? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Principal Component Analysis in MATLAB

I'm implementing PCA using eigenvalue decomposition for sparse data. I know matlab has PCA implemented, but it helps me ... = Ev(:,1:nimages); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How do I use sklearn CountVectorizer with both 'word' and 'char' analyzer? - python

How do I use sklearn CountVectorizer with both 'word' and 'char' analyzer? http://scikit-learn.org/stable/modules/ ... 'you', u'you are'] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - What is batch size in Caffe or convnets

I thought that batch size is only for performance. The bigger the batch, more images are computed at the same time ... me what is batch size? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Python sklearn show loss values during training

I want check my loss values during the training time so I can observe the loss at each iteration. So far ... Does anyone have any suggestions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Neural Network Cost Function in MATLAB

How would I implement this neural network cost function in matlab: Here are what the symbols represent: % m is ... with semi colons and such. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How to prune a tree in R?

I'm doing a classification using rpart in R. The tree model is trained by: > tree <- rpart(activity ~ . ... using cross validation in R? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How to parallelize a training loop ever samples of a batch when CPU is only available in pytorch?

I want to parallelize over single examples or batch of example (in my situation is that I only have cpus, I have ... -samples-of-a-batch/32698/7 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Predictive Analytics - "why" factor & model interpretability

I have the data that contains tons of x variables that are mainly categorical/nominal and my target variable is a ... figure out "why" factor? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Predictive Analytics - "why" factor & model interpretability

I have the data that contains tons of x variables that are mainly categorical/nominal and my target variable is a ... figure out "why" factor? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Custom loss function in Keras to penalize false negatives

I am working on a medical dataset where I am trying to have as less false negatives as possible. A ... negatives. Thanks for the help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Interpreting a Self Organizing Map

I have been doing reading about Self Organizing Maps, and I understand the Algorithm(I think), however ... missing something crucial. Regards See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Why the BIAS is necessary in ANN? Should we have separate BIAS for each layer?

I want to make a model which predicts the future response of the input signal, the architecture of my network is ... , can we use tanh ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Using Keras ImageDataGenerator in a regression model

I want to use the flow_from_directory method of the ImageDataGenerator to generate training data for a regression model, ... to really fit... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How to do gaussian/polynomial regression with scikit-learn?

Does scikit-learn provide facility to perform regression using a gaussian or polynomial kernel? I looked at the APIs ... -learn that does this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How to reuse saved classifier created from explorer(in weka) in eclipse java

I have created a classifier in WEKA, i saved it on my hard-disk, now I want to use that classifier in eclipse ... guide me to this... thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - What is the use of train_on_batch() in keras?

How train_on_batch() is different from fit()? What are the cases when we should use train_on_batch()? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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414 views

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machine learning - Python Non negative Matrix Factorization that handles both zeros and missing data?

I look for a NMF implementation that has a python interface, and handles both missing data and zeros. I don' ... propose such an option. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - how extraction decision rules of random forest in python

I have one question though. I heard from someone that in R, you can use extra packages to extract the ... achieve that. thanks in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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646 views

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machine learning - Train multiple models in parallel with sklearn?

I want to train multiple LinearSVC models with different random states but I prefer to do it in parallel. Is ... the thing under the hood? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Put customized functions in Sklearn pipeline

In my classification scheme, there are several steps including: SMOTE (Synthetic Minority Over-sampling Technique) Fisher ... return(X, y) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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machine learning - Neural Network Ordinal Classification for Age

I have created a simple neural network (Python, Theano) to estimate a persons age based on their spending history ... (E.g logistic regression) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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426 views

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machine learning - AdaBoostClassifier with different base learners

I am trying to use AdaBoostClassifier with a base learner other than DecisionTree. I have tried SVM and ... be used with AdaBoostClassifier? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Best Performance-Critical Algorithm for Solving Nearest Neighbor

We have a list of x,y pairs. Every pair represents a point on a 2D space. I want to find the closest point ... on KD-Trees. Thanks to all! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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