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Data Science : Recent Questions and Answers (Page 288)

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

Rolling average: when is it possible to consider it?

I would like to know if I can consider rolling average to predict the future trend of sells.I collected data from January 2020 to March 2020, day by day,...

Asked on 12/08/2020 by Val

1 answer

Extract Information from PDF using DL

We are having this requirement of extracting information from a credit history document. Usually it is a PDF and a computer generated document.Because these PDFs are generated by different...

Asked on 12/08/2020 by Rajesh Sharma

1 answer

Neural network output is 0 for test data (using RELU for activation)

Maybe this is a naive question, but I have a NN that uses relu for all layers. In train data there is no problem, but in test (or validation) the...

Asked on 12/08/2020 by Pedro Pablo Severin Honorato

0 answer

Why does Keras need TensorFlow as backend?

Why does Keras need the TensorFlow engine? I am not getting correct directions on why we need Keras. We can use TensorFlow to build a neural network model, but why...

Asked on 12/08/2020 by Aj_MLstater

7 answer

predict_classes() returning only 0 or 1 for multiclass image classification

I am trying to build a multi class image classifier but the only returns 0 or 1 . Why is it not returning "Rock" , "Paper" , "Scissor" ?and...

Asked on 12/08/2020

1 answer

Can I use LSTM models to evaluate multiple, independent time series?

Let's say that I would like to predict the temperature tomorrow. I could use the approach whereby I train a model based on a time-series dataset collected from a single...

Asked on 12/08/2020 by CharismaticChromoFauna

2 answer

Role of mode in bottleneck function in unet network

I have come across the script that belongs to a person in kaggle. The snippet is given below. def bottleneck(x,filters_bottleneck,mode='cascade', depth=6,kernel_size=(3,3),activation='relu'): dilated_layers = [] if...

Asked on 12/08/2020 by s326280

1 answer

Facial recognition on offline images

I want to do facial recognition on wide varieties of images captured at various ages of my family members. Below are some of the questions I have.If a person uses...

Asked on 12/08/2020 by Akash

2 answer

Python sklearn PCA transform function output does not match

I am computing PCA on some data using 10 components and using 3 out of 10 as:transformer = PCA(n_components=10)trained=transformer.fit(train)one=numpy.matmul(train,numpy.transpose(trained.components_[:3,:]))Here trained.components_[:3,:] are:array([[-1.43311999e-03, 1.65635865e-01, 5.49189565e-01, ...

Asked on 12/08/2020 by shaifali Gupta

1 answer

Comparing dataframe object with string value in django

I'm implementing machine learning model and using training dataset from MySQL table and all this is built upon Django. So basically all the calculations are done by converting entire data...

Asked on 12/08/2020 by Scorpionk

1 answer

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