Questions tagged [processing]

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Why are wavelet transforms not scale-equivariant?

One can rely on continuous wavelets to build a multi-resolution analysis that is equivariant ("covariant") under the action of a discrete subgroup of translation. When not downsampled, the ...
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2 answers
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Storing Large dataset for processing and analysis of data

I am new to data engineering and wanted to know , what is the best way to store more than 3000 GB of data for further processing and analysis ? I am specifically looking for open source resources . I ...
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Do I load all files at once or one at a time?

I currently have $1700+$ CSV files. Each of them is in the same format and structure, give or take a row or possibly a column at the end. Each CSV is $\approx 3.8$ MB. I need to perform a ...
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CycleGAN vs. AutoEncoder for transforming sketches into images

I'm playing around with the use of deep learning on images and done quite works : colorizing black and white images for example, or maybe fixing old damaged photos. Today I want to tackle a new ...
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3 votes
2 answers
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Optimization of pandas row iteration and summation

i'm wondering if anyone can provide some input on improving the speed and calculations of a pandas result. What i am trying to obtain is a summation of IDs in one table (player table) based on each ...
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3 answers
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Specifying number of threads using XGBoost.train

When using the xgboost.train() function, all the threads are used. I would like to use a specific amount. Unfortunately, this function does not accept the ...
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1 vote
1 answer
933 views

Gunicorn workers timeout

I'm using Flask where i load some pre-trained machine learning models once. I'm also using Gunicorn usually with 2 or 4 workers to handle parallel requests. Every request contains some texts that i ...
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6 votes
1 answer
349 views

How to split natural language script into segments?

I have a bunch of .txt and .srt files extracted from a MOOC website, they are the scripts of the videos. I would like to segment the scripts into parts such that each part falls into one of the ...
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2 votes
1 answer
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Meltdown patch impact on data processing speeds

The patch for the Meltdown vulnerability disables speculative execution, which will impact all processing activities. The degree of impact is highly dependent on the type of processing being done. Is ...
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Alignment of square nonorientable images/data

Another post where I don't know enough terminology to describe things efficiently. For the comments, please suggest some tags and keywords I can add to this post to make it better. Say I have a 2D ...
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4 votes
2 answers
1k views

Cheat Sheet of UNIX commands for Data Science [closed]

I was looking for a cheat sheet of UNIX commands, which are specifically usable for data science. I mean an introduction to very basic commands (starting from cd, <...
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2 answers
92 views

SAS PROC means (two variants together)

PROC means data=d mean; var a; class b; var a; run; I want to perform the "PROC means" for continuous "var a": 1) in general and 2) by classes. But it performed by the classes only. How to make ...
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2 votes
3 answers
1k views

OCR / Text Recognition and Recovery Problem

I am working on a research project that deals with American military casualties during WWII. Specifically, I am attempting to construct a count of casualties for each service at the county level. ...
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1 answer
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Pre-processing (center, scale, impute) among training sets (different forms) and the test set - what is a good approach?

I am currently working on a multi-class classification problem with a large training set. However, it has some specific characteristics, which induced me to experiment with it, resulting in few ...
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2 answers
2k views

Running huge datasets with R

I'm trying to run some analysis with some big datasets (eg 400k rows vs. 400 columns) with R (e.g. using neural networks and recommendation systems). But, it's taking too long to process the data (...
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3 votes
1 answer
86 views

Is it possible to automate generating reproducibility documentation?

First, think it's worth me stating what I mean by replication & reproducibility: Replication of analysis A results in an exact copy of all inputs and processes that are supply and result in ...
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15 votes
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3k views

What is the difference between Hadoop and noSQL

I heard about many tools / frameworks for helping people to process their data (big data environment). One is called Hadoop and the other is the noSQL concept. What is the difference in point of ...
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