Recent questions tagged machine

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machine learning - What is the difference between tf.estimator.Estimator and tf.contrib.learn.Estimator in TensorFlow

Some months ago, I used the tf.contrib.learn.DNNRegressor API from TensorFlow, which I found very convenient ... input_fn parameter et cetera). 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 - Calculating AUC when using Vowpal Wabbit

Is there anyway to compute AUC within Vowpal Wabbit? One of the reasons I am using Vowpal Wabbit is the large ... if the data file is large. 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 deploy locally trained TensorFlow graph file to Google Cloud Platform?

I've followed the TensorFlow for Poets tutorial and replaced the stock flower_photos with a few classes of my own ... run into the same problem? 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 - Padding time-series subsequences for LSTM-RNN training

I have a dataset of time series that I use as input to an LSTM-RNN for action anticipation. The time series ... case? Thank you 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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machine learning - Number of parameters for Keras SimpleRNN

I have a SimpleRNN like: model.add(SimpleRNN(10, input_shape=(3, 1))) model.add(Dense(1, activation=" ... Could you someone answer my question? 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 are word embedding actually vectors?

I am sorry for my naivety, but I don't understand why word embeddings that are the result of NN training ... sorry if my question looks stupid. 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 - Weka: Results of each fold in 10-fold CV

For Weka Explorer (GUI), when we do a 10-fold CV for any given ARFF file, then what Weka Explorer provides ... for each fold. Help appreciated. 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 - Assign new data point to cluster in kernel k-means (kernlab package in R)?

I have a question about the kkmeans function in the kernlab package of R. I am new to this package and ... ? Your help is very appreciated. 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 perform feature selection with gridsearchcv in sklearn in python

I am using recursive feature elimination with cross validation (rfecv) as a feature selector for randomforest classifier ... details if needed. 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 - show feature names after feature selection

I need to build a classifier for text, and now I'm using TfidfVectorizer and SelectKBest to selection ... should use CountVectorizer instead? 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 - Decision Tree in Matlab

I saw the help in Matlab, but they have provided an example without explaining how to use the parameters ... parameters will be appreciated. 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 difference between an Embedding Layer and a Dense Layer?

The docs for an Embedding Layer in Keras say: Turns positive integers (indexes) into dense vectors of fixed size. ... going on 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 - Precision/recall for multiclass-multilabel classification

I'm wondering how to calculate precision and recall measures for multiclass multilabel classification, i.e. ... have multiple labels? 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 - Controlling the threshold in Logistic Regression in Scikit Learn

I am using the LogisticRegression() method in scikit-learn on a highly unbalanced data set. I have even ... regardless of the parameter values? 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 - Early stopping with Keras and sklearn GridSearchCV cross-validation

I wish to implement early stopping with Keras and sklean's GridSearchCV. The working code example below is modified ... (mean, stdev, param)) See Question&Answers more detail:os...

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

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627 views

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machine learning - Keep TFIDF result for predicting new content using Scikit for Python

I am using sklearn on Python to do some clustering. I've trained 200,000 data, and code below works well. ... UPDATE Solved, see answers below. 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 vector normalization can improve the accuracy of clustering and classification?

It is described in Mahout in Action that normalization can slightly improve the accuracy. Can anyone explain the reason, 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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534 views

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machine learning - KMeans clustering in PySpark

I have a spark dataframe 'mydataframe' with many columns. I am trying to run kmeans on only two columns: lat and ... . What am I doing wrong? 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 - Recommended anomaly detection technique for simple, one-dimensional scenario?

I have a scenario where I have several thousand instances of data. The data itself is represented as a single ... simple, one-dimensional data? See Question&Answers more detail:os...

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

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623 views

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machine learning - What is a batch in TensorFlow?

The introductory documentation, which I am reading (TOC here) uses the term "batch" (for instance here) without having defined it. See Question&Answers more detail:os...

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

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511 views

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machine learning - Normalize data before or after split of training and testing data?

I want to separate my data into train and test set, should I apply normalization over data before or ... while building predictive model? See Question&Answers more detail:os...

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

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517 views

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machine learning - How to use k-fold cross validation in a neural network

We are writing a small ANN which is supposed to categorize 7000 products into 7 classes based on 10 input ... of step would be appreciated See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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675 views

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machine learning - Batch Normalization in Convolutional Neural Network

I am newbie in convolutional neural networks and just have idea about feature maps and how convolution is done on ... me in much simpler terms See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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499 views

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machine learning - What is the role of "Flatten" in Keras?

I am trying to understand the role of the Flatten function in Keras. Below is my code, which is a simple two- ... I need to further flatten it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - Unsupervised Sentiment Analysis

I've been reading a lot of articles that explain the need for an initial set of texts that are classified as ... this strategy isn't realistic? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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603 views

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machine learning - knapsack optimization with dynamic variables

I am trying to solve an optimization problem, that it's very similar to the knapsack problem but it can not ... very similar to this problem: See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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338 views

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machine learning - Accuracy reported by caffe and pycaffe are different

Below is the train.Prototxt file that is used to train a pretrained model. name: "TempWLDNET" layer { name: "data" type: " ... 0.75 } } layers { name: "pool1" type: POOLING bo...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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561 views

1 answer

machine learning - sklearn TfidfVectorizer : Generate Custom NGrams by not removing stopword in them

Following is my code: sklearn_tfidf = TfidfVectorizer(ngram_range= (3,3),stop_words=stopwordslist, norm='l2',min_df ... this. Need suggestions. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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