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Mastering Development

Generate probability distribution or smoothing plot from points containing probabilities

I have points which include the probability on the y-axis and values on the x-axis, like: p1 = [[0.0, 0.0001430560406790707], [10.0, 6.2797052001508247e-13], [15.0, 4.8114669550502021e-06], [20.0, 0.0007443231772534647], [25.0, 0.00061070912573869406], [30.0, 0.48116582167944905], [35.0, 0.24698643991977953], [40.0, 0.016407283121225951], [45.0, 0.2557158314329116], [50.0, 1.1252231121357235e-05], [55.0, 0.064666668633158647], [60.0, 1.7631447655837744e-17], [65.0, 1.1294722466816786e-14], [70.0, 2.9419020411134367e-16], [75.0, 3.0887653014525822e-17], [80.0, 4.4973693062706866e-17], [85.0, 9.0975358174005147e-15], [90.0, 1.0758266454985257e-10], [95.0, […]

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Development

Sort list in Pyspark using udf and numpy

I have a PySpark dataframe where the second column is a list of lists. Following is the PySpark dataframe that I have: +—+——————————+ |A |B | +—+——————————+ |a |[[95.0], [25.0, 25.0], [40.0]]| |a |[[95.0], [20.0, 80.0]] | |a |[[95.0], [25.0, 75.0]] | |b |[[95.0], [25.0, 75.0]] | |b |[[95.0], [12.0, 88.0]] | +—+——————————+ In this […]

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Development

How to apply linear regression with fixed x intercept in python?

I’ve found quite a few examples of fitting a linear regression with zero intercept. However, I would like to fit a linear regression with a fixed x-intercept. In other words, the regression will start at a specific x. I have the following code for plotting. import numpy as np import matplotlib.pyplot as plt xs = […]

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Development

Cannot press buttons in my Flutter app until I press the Debug button in Dart DevTools while debugging

I’m writing a Flutter app and recently (I’m using the web-enabled version of flutter) I have to press the Debug button in the DartDev tool at the start of each debugging session to enable a button to work.For example, I press F5 on my keyboard to start the debugging session using the Mac iPhone Simulator […]

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Development

Absolute positioned SVG above a div element shows a gap in Firefox

I’ve the problem, that with an absolute positioned SVG element, which should be displayed above a div element, a gap is shown in Firefox 71.0 (64-bit). The following minimal example outlines the problem: <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″ /> <title>Example</title> <style> html { height: 100%; } body { display: flex; flex-direction: column; margin: […]

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Development

How is whenReturn/willReturn is used while we can give any arbitrary value to the stub we created via @Mock that inserted/injected to concrete class?

How is whenReturn/willReturn is used while we can give any arbitrary value to the mock created via @Mock and added to concrete class? Edit:As far as i got JB Nizet’s answer and this one, i got assigning a value to mock and asserting that value does not test anything but there are so many examples […]

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Development

How do I use enumerate in Python to compute STD of a list?

I’m trying to compute the standard deviation of a list [vr]. The list has size 32, containing an array of size 3980. This array represents a value at a given height (3980 heights). First I split the data into 15 minute chunks, where the minutes are given in ‘raytimes.’ Raytimes is a list of size […]

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Development

Fréchet distribution parameters estimation in R?

I would need to calculate the parameters of a Fréchet distribution. I am using the packages fitdistrplus and evd of R. But I don’t know what values to initialize the parameters. library(fitdistrplus) library(evd) #Datos x<-c(19.1,20.2,14.3,19.0,18.8,18.5,20.0,18.6,11.4,15.6,17.4,16.2,15.7,14.3,14.9,14.0,20.2,17.4,18.6,17.0,16.0,12.2,10.8,12.4,10.2,19.8,23.4) fit.frechet<-fitdist(x,”frechet”) fit.frechet<-fitdist(x,”frechet”) generating the following error Error in computing default starting values. Error in manageparam(start.arg = start, fix.arg = fix.arg, […]

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Development JSON

How to compare JSON with varying order?

I’m attempting to implement testing with golden files, however, the JSON my function generates varies in order but maintains the same values. I’ve implemented the comparison method used here: How to compare two JSON requests? But it’s order dependent. And as stated here by brad: JSON objects are unordered, just like Go maps. If you’re […]

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Development

‘paintEvent’ handler for ‘QPainter’ not working after change the ‘Widget’ background color

I am using Qt Creator 4.5.2 (Qt 5.9.5, GCC 7.3.0 64-bit) and running on Ubuntu 18.04. I was trying to test the ‘paintEvent’ handler for ‘centralwidget’ by adding some ‘text’ on the screen. Initially, the ‘paintEvent’ handler worked and it would draw the TEXT. However, after I changed the background color by using ‘stylesheet’. All […]