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Questions tagged [sliding-window]

In data analysis, sliding windows are advancing sub-lists inside lists which allow, e.g., computation of a record's change from the previous record or next record. In networking, a sliding window may refer to a flow control technique that maintains windows of sequential frames sent or received without a corresponding acknowledgement.

In data analysis, sliding windows are advancing sub-lists inside lists which allow, e.g., computation of a record's change from the previous record or next record. In SQL in particular, the analytic functions LEAD(), LAG(), and computations OVER() a changing subset of query results involve sliding windows.

In networking, a sliding window may refer to a flow control technique that maintains windows of sequential frames sent or received without a corresponding acknowledgement.

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sliding window on a python image

I want to transform this matlab code to python: images = []; foreach image in images: features = []; windows = extractWindows(image,size=(30,30),stride=(30,30)); foreach window in windows: featureVector =…
frank97
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How to highlight the regions in a plot to indicate the sliding windows in Python?

I have a time series with extreme events and I tried to get the width of these extreme events using sliding window approach. I used the code: def moving_window(s, length, step =1): streams = it.tee(s, length) return…
Monali
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Implement sliding window on file lines in Python

I'm trying to implement a sliding/moving window approach on lines of a csv file using Python. Each line can have a column with a binary value yes or no. Basically, I want to rare yes noises. That means if say we have 3 yes lines in a window of 5…
Tina J
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How to flatten a 3d array of sliding window into 2d array?

I'm using an Autoencoder LSTM in python(Keras). I have a multivariate input and I use a sliding window approach to convert it to the proper format of LSTM input. In the end, I get the output with the same shape as the window. Then I want to convert…
zahra
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Is there a function in python to detect singular points on a curve?

I need to detect singular points (extremas, trend change, sharp changes) on a given curve plotted from a dataset. The first thing to come in mind is the inflexion point detection with derivation( but i dont have the mathematical expression of the…
skull95
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Is there a fast R function like rollapplyr with increasing window size?

I want to calculate a sum over a sliding window on grouped data. As I would like to stick to official functions if possible I started with rollapplyr like this: library(tidyverse) library(reshape2) library(zoo) data =…
Stephan Claus
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algorithm about sliding window

This question is a variant of k empty slot from leetcode. the new question is, ask to find the last day when there are k consecutive bloomed flowers. e.g. total 7 days, 1 represents flower bloomed，0 represents flower not bloomed, k=3 day1：1 0 0 0 0…
Tianbo
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How to put an "arbitrary" operation into a sliding window using Theano?

I want to define some function on a matrix X. For example mean(pow(X - X0, 2)), where X0 is another matrix (X0 is fixed / constant). To make it more specific, let's assume that both X and X0 are 10 x 10 matrices. The result of the operation is a…
Roman
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Pandas Sliding/Rolling Window over Irregular Time Series

Please excuse poor style and inefficient solutions. All help is greatly appreciated. Context: Attempting to isolate the best rate of cycling performance gain over a 6-week block over the course of one year. Performance is measured as the maximum…
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Neo4j: Check condition between all consecutive relations in path

I want to query all paths of arbitrary length (a)-[:Relation*]->(b) where for each pair (r1, r2) of consecutive relationships ()-[r1]->()-[r2]->() a condition, say r2.foo > r1.foo, is met. You can imagine foo being a timestamp and I only want to…
Kirill Rakhman
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R: Window function

I have a data frame DF, with three columns and n rows shown below: Month Year Default 1 2015 T 2 2015 T 3 2015 F 4 2015 T 5 2015 T 6 2015 T 7 2015 F I would like to check if there are 3 T in a roll and keep going…
Lawrence Ng
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Sliding Window: Implementation and Performance (Java)

I want to implement a very simple sliding window. In other words, I will have some kind of list with objects inserted from the right end of that list and dropped from the left end. In every insertion, the previous objects are left-shifted by one…
PeterHiggs
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sql sliding window - finding max value over interval

i have a sliding window problem. specifically, i do not know where my window should start and where it should end. i do know the size of my interval/window. i need to find the start/end of the window that delivers the best (or worst, depending on…
jasonmclose
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csv.reader only reading in one line

I am pretty new to python. I am trying to process data on a very large .csv file (~6.8 million lines). An example of the lines would look like: Group1.1 57645 0.0954454545 Group1.1 57662 0.09556544778 Group1.13 500 0.357114538…
abovezero
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Flexible sliding window (in Python)

Problem description: I'm interested in looking at terms in the text window of, say, 3 words to the left and 3 to the right. The base case has the form of w-3 w-2 w-1 term w+1 w+2 w+3. I want to implement a sliding window over my text with which I…
sim
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