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Recent questions tagged machine-learning

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1 answers 1 answer
438
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Step-by-Step Hidden State Calculation in a Recurrent Neural Network
Consider a simplified Recurrent Neural Network (RNN) with a single input and a single output. The hidden state is updated using the recurrence:$$ h_t = \text{ReLU}(W_{ih}...
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How to calculate feed-forward (forward-propagation) in neural network for classification?
For the following neural network, calculate accuracy of classification, given these settings
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When to use one hot encode a category and when to segment by category?
When pre processing data for machine learning. Is there any difference in using one hot encoding to turn categoric variables into numeric variables or to segment the data...
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7.6k views
How to calculate the residual errors, (MSE),(MAE), and (RMSE)?
Given the following sample dataset with 5 samples and 2 features:SampleFeature 1Feature 2Actual ValuePredicted Value1234623456345674567856789Calculate the residual errors...
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Creating tables from unstructured texts about stock market
I am trying to extract information such as profits, revenues and others along with their corresponding dates and quarters from an unstructured text about stock market and...
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Kmeans clustering in python - Giving original labels to predicted clusters
I have a dataset with 7 labels in the target variable.X = data.drop('target', axis=1) Y = data['target'] Y.unique()array(['Normal_Weight', 'Overweight_Level_I', 'Overweig...
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how to output f1-score instead of accuracy
I have the code below, outputting the accuracy. How can I output the F1-score instead? Thanks in advance,clf.fit(data_train,target_train) preds = clf.predict(data_test) #...
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990
990 views
I cannot get this code to work. please help.
from keras.models import Sequential from keras.layers import Dense from keras.layers import LSTM from sklearn.model_selection import train_test_splitmodel = Sequential() ...
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1 1 answer
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When dealing with categorical values, should the 'year' column be encoded using OHE or OrdinalEncoder?
It's a car prices dataset, and so I'm assuming that the more recent the more value a car should have. The values in the 'year' column simply consist of years from 1995 to...
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548
548 views
How do I know which encoder to use to convert from categorical variables to numerical?
So say I have a column with categorical data like different styles of temperature: 'Lukewarm', 'Hot', 'Scalding', 'Cold', 'Frostbite',... etc.I know that we can use pd.ge...
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367
367 views
Can Data Science solve this problem?
So, I live in Brazil, and I have a task for college that I don't know what data science method to use, if at all, to solve it. My idea is the following: We Brazilians hav...
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529
529 views
how many samples do we need to test image segmentation using synthetic data ?
Hello,I trained a CNN using synthetic data to perform a segmentation task on human faces. During the test and to evaluate the prediction of this network, I used 200 examp...
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Can we have multiple target values in a ML problem dataset for supervised learning?
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484
484 views
Intermittent Mathematics (Logarim)
The old keypad of the telephone, it has 10 numbers (10 keys) , this keypad allows the user to enter a text by successively pressing certain key many times in a small peri...
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457
457 views
Very short text classification when category text should be replaced by another category text?
I need some tool to classify articles based on short category text which consists of two or three words separated by '-'. The RSS/XML tag content is for example:Foreign -...
1 1 vote
1 1 answer
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723 views
Do I need to save the standardization transformation?
When I standardized my data when I created my model. Do I need to save the standardization transformation when I want to predict with my model new data ?
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How to predict from unseen data?
Hi. I have a question about model-based predictions when data is only available after the fact. Let me give you an example. I try to predict the result (HOME, AWAY or a D...
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1 answers 1 answer
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How to model unknown yet data
So far, I have modeled on known historical data. What if there are variables known only after the fact?Let me give you an example. I want to predict the outcome of the ma...
1 1 vote
1 1 answer
677
677 views
From microarray data, which tools of pattern recognition can you apply to identify the genes responsible for diseases?
“During the last decade, the advent of microarray datasets stimulated a new line of research called Bioinformatics. A microarray database is a repository containing micro...
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