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Data Science : Recent Questions and Answers (Page 308)

Find answers to your questions about Data Science or help others by answering their Data Science questions.

Extra output layer in a neural network (Decimal to binary)

I'm working through a question from the online book. I can understand that if the additional output layer is of 5 output neurons, I could probably set...

Asked on 10/31/2020 by Victor Yip

4 answer

Is iterative pruning always structured?

Iterative pruning works like the following:Evaluate model performance, continue if performance is fineApply pruningTrain the modelGo back to step 1When doing this process using unstructured pruning I set 5% of...

Asked on 10/31/2020 by Tim von Känel

0 answer

What is the time complexity of learninig phase of Hopfield neural network?

It really intrigues me what is the time complexity of learning phase of Hopfield neural network, how it depends of the number of training examples and number of attributes? ...

Asked on 10/31/2020 by Georgi Georgiev

0 answer

Convert a pdf into a conditional pdf such that mean increases and std dev falls

Let success metric(for some business use case I am working on) be a continuous random variable S.The mean of pdf defined on S indicates the chance of success. Higher...

Asked on 10/30/2020 by claudius

1 answer

Creating an "unclassified" class in Random Forest

I am trying to classify satellite based images by creating a region of interest and then classifying according to it. I am using a Jupyter notebook using python to do...

Asked on 10/30/2020

1 answer

Training accuracy is ~97% but validation accuracy is stuck at ~40%

I am trying to classify images into 27 classes using a Conv2D network. The training accuracy rises through epochs as expected but the val_accuracy and val_loss values fluctuate severely and...

Asked on 10/30/2020 by Punit Singh

1 answer

What is multi-hot encoding?

I was read and paper for machine learning, and i found this term "multi-hot encoding" without explanation.Can you help me please?the paper: https://arxiv.org/abs/2001.06917...

Asked on 10/30/2020 by Abdelali Mohammed

1 answer

Not able to interpret decision tree when using class_weights

I'm working with an imbalanced dataset. I'm using a decision tree (scikit-learn) to build a model. For explaining my problem I've taken iris dataset. When I'm setting class_weight=None,...

Asked on 10/29/2020 by rahul

1 answer

How to understand the return values of scipy.interpolate.splrep

BackgroundContinuation of Spline interpolation - why cube with 2nd derivativeas following Cubic Spline Interpolation in youtube. The example in the youtube is below. ...

Asked on 10/29/2020 by mon

1 answer

Computing variance of an SGD iteration

It is known that SGD iteration has huge variance.Given the iteration update:$$w^{k+1} := w^k - underbrace{alpha g_i(w^k)}_{p^k},$$where $w$ are model weights and...

Asked on 10/29/2020 by user93607

1 answer

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