Data Science Questions, Problems & Solutions : TransWikia.com ~ Page 32

Difference between convolution structures

I am having a hard time understanding the difference what is a multichannel CNN:In the paper titled, "A Multichannel 2D Convolutional Neural Network Model for Task-Evoked fMRI Data Classification"...

Asked on 09/05/2021 by Sm1

1 answer

Is using samples from the same person in both trainset and testset considers being a data leakage?

Suppose a neural network is built for a binary classification problem such as recognize the face as a smiley face or not, by using a dataset of 1000 persons and...

Asked on 09/05/2021

1 answer

Learning the uncertainty of a ML algorithm

I have a regression GAM (General Additive Model) and I want to learn its epistemic uncertainty( the variance of my residuals or predictions as a function of my input).I...

Asked on 09/05/2021 by mirimo

1 answer

Tensorflow API: What does the metric `tf.keras.metrics.TopKCategoricalAccuracy` do?

According to the API doc, this metric"Computes how often targets are in the top K predictions."But how come the following codes prouce the result 1?0.95>0.9>0.8>0.1>0.05, both 0.95 and 0.8...

Asked on 09/05/2021

1 answer

Confused AUC ROC score

I am working on binary classification problem, I try to evaluate the performance of some classification algorithms (LR,Decission Tree , Random forest ...).I am using a cross validation...

Asked on 09/05/2021

2 answer

Does the test set has to be in [0,1] range?

I have standardized training set usingmean = XTrain.mean()XTrain-=meanstd = XTrain.std()XTrain/=stdAnd then used mean and std to standardize validation and test sets. The training and validation sets have values...

Asked on 09/05/2021 by skrrrt

2 answer

How do I build a recommend system based on user's past purchases?

I am exploring approaches to build a model that shows personalized search results (with or without query) for a fashion eCommerce platform. For that I am first working on coming...

Asked on 09/05/2021 by PranavM

1 answer

Running H2O in databricks

I'm trying to run H2O in databricks. However, when I do the following: hc = pysparkling.H2OContext.getOrCreate(spark) I get the following error: java.lang.AbstractMethodError Does anyone know what could be the problem?...

Asked on 09/05/2021 by physics_2015

1 answer

Overfitted model produces similar AUC on test set, so which model do I go with?

I was trying to compare the effect of running GridSearchCV on a dataset which was oversampled prior and oversampled after the training folds are selected. The oversampling approach I used...

Asked on 09/05/2021 by rayven1lk

3 answer

Extracting keywords from pdf file with python

I have a pdf file(link below). I have to extract keywords from it and also need have there frequency in pdf file. E.g. 'Java':42, 'inheritance':3. I have to store the...

Asked on 09/05/2021 by Mr. Scientist

1 answer

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