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1 1 vote
1 1 answer
1.6k
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How to analyse imbalanced categorical colum in dataset
Hello,I have a dataset with a categorical column that contains three categories. One of the categories represents 98% of the data, while the remaining 2% are distributed ...
0 0 votes
1 answers 1 answer
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437 views
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}...
0 0 votes
1 answers 1 answer
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2.5k views
How to calculate feed-forward (forward-propagation) in neural network for classification?
For the following neural network, calculate accuracy of classification, given these settings
2 2 votes
1 answers 1 answer
6.6k
6.6k views
How to update weights using gradient decent algorithm?
For the below neural network, imagine we are going to use the backpropagation algorithm to update weights. If the Bias (b) in this problem is always 0 (ignore bias when y...
3 3 votes
1 answers 1 answer
7.4k
7.4k views
How to update weights in backpropagation algorithm (a numerical example)?
Assume we have the following neural network and all activation functions are $f(z)=z$. If the weights are initialized with the values you see in table below, what will be...
0 0 votes
0 0 answers
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1.3k views
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...
0 0 votes
1 1 answer
7.6k
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...
0 0 votes
0 0 answers
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1.3k views
Can you verify the validity of this chart comparing the review scores for Marvel Phase 4?
I have some skepticism about the validity of the charts below comparing the critic and audience reviews for Phase 4 of the MCU to the previous 3 phases. There are over 18...
0 0 votes
1 answers 1 answer
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2.6k views
How to use Genetic Algorithm to optimize a function?
Assume the function is defined as $f(x,y)=x^2+y^2-4xy$, and $1\leq x \leq 4,1\leq y \leq 4$. The Genetic Algorithm is selected to maximize the function. If the first pop...
0 0 votes
1 answers 1 answer
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1.9k views
List of free Qwiklabs labs
Provide a short list of free cloud labs on Qwiklabs
1 1 vote
1 answers 1 answer
3.6k
3.6k views
What is the difference between a batch and an epoch in a Neural Network?
Both of the batch size and number of epochs are integer values and seem to do the same thing in Stochastic gradient descent. What are these two hyper-parameters of this l...
0 0 votes
0 0 answers
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1.4k views
Which code has best runtime and why?(the one commented or the other one)
# for key, value in dict.items(): # if value >= long: # long = value # long_name = key # if value < sh...
0 0 votes
0 0 answers
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1.5k views
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...
0 0 votes
0 0 answers
1.3k
1.3k views
How do I compare the count of a value in each year while having a different sanple size each year.
How do I accurately compare between the number of something a survey measure from my employees each year with a varying umber of survey engagement and employee size?If I ...
0 0 votes
0 0 answers
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1.4k views
Is it possible to make a forecast of a future value of Air Temperature using Fast Fourier Transform?
Is it possible to make a forecast of a future value of Air Temperature using Fast Fourier Transform, if yes, what should be the process or how you'll be able to do it. Th...
0 0 votes
0 0 answers
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1.3k views
forecast log transformed fitted values for 2 years using ARMA model
Input is a stock price in exponential transformation. We are asked to forecast using ARMA results for 2 years.
0 0 votes
0 0 answers
1.5k
1.5k views
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...
0 0 votes
0 0 answers
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1.0k views
Bankruptcy prediction and credit card
Hello everyone newbie data scientist here.I'm working on a project to predict companies (probability of default) bankruptcy probability and to assign them a credit rating...
0 0 votes
1 1 answer
1.8k
1.8k views
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) #...
0 0 votes
0 0 answers
989
989 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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