Say I have this data.frame The columns are mutually exclusive. I need to generate the output I've tried to to it with data.table fifelse but it ...

In my 2D (top-down) game, I am attempting to add a dash function. Using an if (keyWentDown("e")) {} condition inside a function named dash. I have a ...

I have a spatVector composed of a single-line geometry that covers the entire road network of my study area. I would like to create a set of N random ...

Given Is there a way to achieve this in one single fprintf() call? I have a solution where there is no backslash between a and b ...

I am working on a problem in which I must return a type vector. I know the size of the vector will be exactly two. Is there a way I can return my valu ...

I've been trying to put every single element of a vector of integers into a string. I want to achieve this by type casting the integers into strings, ...

I'm trying to write a function that represents a two-dimensional vector, each element of vector has two information. I wanted to write a method that s ...

I am trying to create a nested loop in rust, that goes through a vector. Essentially, it looks like this: However, this will not work; Rust cannot ...

I try to use iterator on vector slices, but it just doesn't work. My code are as follows pub fn three_sum(nums: Vec<i32>) -> Vec<Vec&l ...

I have 2 arrays Q and Z. I want to plot Q on the y-axis and Z on the x-axis. The elements of Z are 0s and 1s. What I want is to draw a horizontal lin ...

I tried if vec2 > 600 save it to va ...

I want to find the length, nc, of this "vector of functions". I should be 2. I tried with length(comp) and length(comp(x)) but it doesn't work. I g ...

i have tried many solver but getting errors somewhere. now im going to try gekko for my problem. Please Lt me know that gekko can this kind of problem ...

hello everyone, I making practice on assoc functions so I wanted to create a sample database just using assoc functions to do the practice. I check ...

How can one create a logical vector that has TRUE for the first matching condition and FALSE otherwise? v = rep(1:4, 3) v == 3 #[1] FALSE FALSE TRUE ...

I was wondering if someone would help me with this problem. I have complex 3x1 matrix that looks like, As I am not interested in the last element I ...

So I am trying to make a copy of a vector that would be immediate instead of copying one by one the values of a vector to the other vector. The code ...

I have implemented a rudimentary vector using the code from the Weiss C++ textbook on data structures (see below). when i time it with 100,000 push_ba ...

i have this function with constructor: Which is called like this: How do I modify this function so it will let me pass my variables like this: t ...

I wrote a function to calculate PAFPM2.5 This function works fine. However, there is a fatal error in my last step where I try to apply the function ...