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Mastering Development

Proportion vs. binary response with pglm

I’m working with panel data comprising several years of observations of schools. My DV is a proportion of exam passers but is not normally distributed, and many observations of the DV are > 0.8. A panel linear model using plm() is therefore inappropriate, so I am trying to treat the DV as a binary response […]

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Mastering Development

Fastest Algorithm to Find the Minimum Sum of Absolute Differences through List Rotation

By rotating 2 lists either from left to right, Find the smallest possible sum of the absolute value of the differences between each corresponding item in the two lists given they’re the same length. Rotation Sample: List [0, 1, 2, 3, 4, 5] rotated to the left = [1, 2, 3, 4, 5, 0] List […]

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Mastering Development

Fast way to remove array of specific row values from 2D numpy array

I have a 2D array like this: a = np.array([[25, 83, 18, 71], [75, 7, 0, 85], [25, 83, 18, 71], [25, 83, 18, 71], [75, 48, 8, 43], [ 7, 47, 96, 94], [ 7, 47, 96, 94], [56, 75, 50, 0], [19, 49, 92, 57], [52, 93, 58, 9]]) and I want to […]

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Mastering Development

R ggplot2: Data in weeks but I want the X-axis in my figure in years

Needed help in this problem. My data is something like this. week status dist 0 1 44% 0 2 47% 0 3 9% 1 1 46% 1 2 46% 1 3 8% young = g_young %>% ggplot()+ geom_area(aes(x = week,y=dist, fill = factor(status), position = "stack", width = 1), stat = "identity", show.legend=FALSE) + scale_fill_brewer(labels […]

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Mastering Development

Turn SpatialPointsDataframe to SpatialGridDataframe

I am trying to convert a SpatialPointsDataframe to a SpatialGridDataframe in order to use the slopeasp() function from the landsat package to get the values for slope. I tried to convert the SpatialPointsDataframe to a raster to convert it but it also didn’t work and I get the error. Error in as(pts, "spatialGridDataFrame") : no […]

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User Help

How to print partition list in the order of there presence on disk (Manjaro linux)

Sda is partitioned this way : Note the specific sequence : sda11 > sda6 > sda7 > sda9 > … Want to print the info of partitions in this same sequence and store it in a text file. What I have tried – gdisk -l /dev/sda [manjaro@manjaro-10ahs0wn00 ~]$ sudo gdisk -l /dev/sda GPT fdisk (gdisk) […]

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Mastering Development

How can I get all details of the top x models from forecast::auto.arima in R?

My goal is to exactly re-create the top say 3 models from the auto.arima function in R. My example uses the following series: > data <- c(79, 73, 102, 158, 235, 326, 216, 153, 82, 87, 94, 163, 119, 81, 143, 179, 182, 247, 248, 105, 143, 64, 45, 163, 122, 95, 47, 117, 345, […]

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Mastering Development

Object.keys(myObject) returns an arbitrary list of numbers, not expected value

This is a bit of a head-scratcher – and has been a source of pain for the past 3 hours. Here’s my code. const payloadBody = JSON.parse(gatewayEvent.body); console.log(payloadBody); console.log(gatewayEvent.body); console.log(payloadBody.paymentMethodId); console.log(payloadBody[‘paymentMethodId’]); console.log(Object.keys(payloadBody)); If I look at the CloudWatch logs for this (I am executing in Lambda), the line console.log(payloadBody) logs: { "customerId": "cus_REDACTED", "paymentMethodId": "pm_REDACTED", […]

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Mastering Development

Need help python

import numpy as np z = np.array([170, 160, 175, 180, 195]) a = np.array([[1, 0, 0, 0, 0], [1, 1, 0, 0, 0], [1, 1, 0, 0, 0], [1, 1, 1, 0, 0], [0, 1, 1, 0, 0], [0, 0, 1, 1, 0], [0, 0, 1, 1, 0], [0, 0, 0, 1, 0], [0, 0, […]

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Ask Engineering

Voltage sensitivity coefficients for unbalanced radial distribution feeders

I am wondering if my implementation of voltage sensitivity coefficients for unbalanced three-phase-four-wire radial distribution feeders is correct. We got \$\bar{V}\$ for phase(s) of all the buses and \$\bar{Y}\$, the admittance matrix of the feeder. \$\mathcal{S}\$ is the set for phases of the slack bus, and \$\mathcal{N}\$ is the set for phase(s) of all the […]