Categories
Mastering Development

Array returns as null in JS but “non-null” in GS

I’m attempting to use Apps Script and JS on a web app to retreive information stored in a google sheet, then output it to the webapp. However, I keep getting the error "cannot read property of null". Problem is, when i run the apps script side of the code (as follows), my array is fine […]

Categories
Mastering Development

Java AWT canvas in the output is overiding it’s own graphic contents

I was practising and came across a problem with no perfect explanation of solution. ”’ package com.company; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class Main extends Frame { public Main() { Button bt = new Button("Click me"); bt.setBounds(20,40,80,30); bt.setBackground(Color.green); bt.setForeground(Color.blue); Label l1 = new Label("This is label"); l1.setBounds(20,90,80,30); TextField tf1 […]

Categories
Mastering Development

Add or Update elements of an ArrayList based on another ArrayList

I have two ArrayLists of ClassRoom object and below shows the ClassRoom class : public class ClassRoom { private String className; // className is unique here private List<Student> students = new ArrayList<>(); public ClassRoom(String className, List<Student> students) { this.className = className; this.students = students; } public String getClassName() { return className; } public void setClassName(String […]

Categories
Mastering Development

Variable array creation using numpy operations

I wish to create a variable array of numbers in numpy while skipping a chunk of numbers. For instance, If I have the variables: m = 5 k = 3 num = 50 I want to create a linearly spaced numpy array starting at num and ending at num – k, skip k numbers and […]

Categories
Mastering Development

Compare two lists in Pandas Dataframe with different length

I have two dataframes with lists which I need to compare in order to know if one row is the same than the other and then add it. The two datasets are: Dataset 1 sex age zip_code 0 F 46 08204 [6, 40, 9, 44, 30] 1 F 40 08205 [33, 41, 48, 50, 30] […]

Categories
Mastering Development

Is there a way to make a time series out of an unevenly intervaled data frame in R?

I have a data set with paired values which I have converted into a data frame like this: (50.0, 0.0), (49, 27.891), (48, 28.119), (47, 28.146), (46, 28.158), (45, 28.195), (44, 28.261), (43, 28.274), (42, 28.316), (41, 28.326), (40, 28.608), (39, 28.687), (38, 28.736), (37, 28.746) numeric_data clean_time_numeric clean_position_numeric 1 0.000 50 2 27.891 49 […]

Categories
Ask Geographic Information System (GIS)

How to interpret Kernel Density Maps

In this example, kernel density maps are created. In this example, it is shown how to create comparable kernel density raster maps Now I would like to understand what are the units of kernel density maps in R. ?kde2d says: Two-Dimensional Kernel Density Estimation: Two-dimensional kernel density estimation with an axis-aligned bivariate normal kernel, evaluated […]

Categories
Arduino Ask Engineering

4×4 matrix keypad not working

I’m working on a research project that allows me to press a button on a matrix that then outputs a parameter like temperature, humidity etc. But I cannot find out what is wrong with the buttons, when I press them nothing is happening. Thank you very much! I’ve attached what the connection between the Arduino […]

Categories
Mastering Development

Find all SUBSETS of a 1D array that have a specified number of UNIQUE elements (n) AND a specified sum (s)

Consider a 1D numpy array and two constants as shown: import numpy as np arr = np.arange(60) n = 5 s = 120 arr is always of the form [0,1,2,3,4, … 59,60] for example. QUESTION: From a 1D array (arr), I need to find all subsets exactly n UNIQUE elements that have a specified sum […]

Categories
User Help

convert-im6.q16: memory allocation failed for converting from gif to bmp

I am trying to convert a file from .gif to .bmp using this command: convert -coalesce pixels8.gif out.bmp While doing this i get this error: convert-im6.q16: memory allocation failed `pixels8.gif’ @ error/gif.c/ReadGIFImage/1303. convert-im6.q16: no images defined `out.bmp’ @ error/convert.c/ConvertImageCommand/3258. I am not sure what the problem is. I have taken this command from https://github.com/glouw/paperview. My […]