Data Science Questions, Problems & Solutions : TransWikia.com ~ Page 78

How to grid search feature selection and neural network hyperparameters in the same grid?

I'm using the GridSearchCV () class from scikit to perform hyperparameter optimization in a sequential neural network. I've built a pipeline to also find the best number of features by...

Asked on 07/14/2021 by kaylani2

1 answer

Text Mapping - Medicine Names

We have a problem where we have a standardized database of Medicine names. On the other hand, there is a subset of medicine names which could have spelling mistakes,...

Asked on 07/14/2021 by Kaushal Shah

1 answer

For a square matrix of data, I achieve $R^2=1$ for Linear Regression and $R^2=0$ for Lasso. What's the intuition behind?

For a square matrix of random data, N columns and N rows. I am fitting two models, linear regression and Lasso. For the linear regression, I achieve a perfect score...

Asked on 07/14/2021

1 answer

Efficient Decision Tree Pruning

Is there an efficient way to handle pruning in Decision Tree with Python ? Currently I'm doing that:def do_best_tree(Xtrain, ytrain, Xtest, ytest): clf = DecisionTreeClassifier()...

Asked on 07/14/2021

1 answer

Adding Features To Time Series Model LSTM

have been reading up a bit on LSTM's and their use for time series and its been interesting but difficult at the same time. One thing I have had difficulties...

Asked on 07/14/2021 by Rjay155

5 answer

Statistical test using Gmean to compare multiple algorithms on multiple datasets

I am new in this area. I am facing some issues while comparing the algorithms using statistical test. I have following result of Gmean of some classification algorithm. Abalone, Balance-scale,...

Asked on 07/14/2021 by Nafisa Anjum Samia

1 answer

Finding variable values to make equations behave like boolean gate

I came across following problem:Consider the following simple perceptron, for which the inputs are the always $1$ feature and two binary features $x_1 ∈ {0, 1}$ and ...

Asked on 07/14/2021 by anir

1 answer

How to train an LSTM model with data that has multiple input rows per day but only one row of label/ground-truth (output) data per day

I am doing a sleep data science experiment and I need a model that outputs multiple columns sleep quality measurement values (that are decimal numbers) for each input. For training,...

Asked on 07/13/2021 by adonayresom

0 answer

Preparing ground truth labels for YOLO3

I want to train YOLO3 for a custom dataset that has raw labels in JSON format. Each bounding box in JSON is specified as [x1, y1, x2, y2]. So...

Asked on 07/13/2021 by Alexandru Dinu

1 answer

AttributeError: 'numpy.ndarray' object has no attribute 'img_to_array'

from keras.models import load_modelfrom keras.preprocessing import imageimport matplotlib.pyplot as pltimport numpy as npimport mathimport cv2import numpy as npimport matplotlib.pyplot as pltfrom keras.models import model_from_jsonimport jsonimg_width, img_height = 150, 150with...

Asked on 07/13/2021 by divya cs

1 answer

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