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Mastering Development

Scaling Two Y-axes using GGPlot

I’m new to R and GGplot altogether. I’ve been asked to build a figure with four unique variables – two columns and two lines. I am able to plot all four on one figure, but I’m having a hard time scaling my y axes. I need my primary y to represent discrete events with values […]

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Mastering Development

Multiple joins on the same table multiply counts

When I run multiple joins on the same table, the first join seems to be the only one to go through. For example, I’ll get results like this: ID, NAME, 200, 200 ID, NAME, 150, 150 ID, NAME, 100, 100 Where obviously the ticket count is clearly not the same as the time entry count. […]

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Mastering Development

Add symbols on pictures

I want to add some symbols to pictures with any languages (preference in C++). I found a library that helps stick to movie subtitles. But I’m looking for something specific to the pictures and I want more options to add like shapes and other symbols. I am searching for code or liberry that draws symbols […]

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Mastering Development

Calculate difference of values between two timestamps and assign difference to each row in the results

DB-Fiddle CREATE TABLE operations ( id int auto_increment primary key, time_stamp DATE, product VARCHAR(255), plan_week VARCHAR(255), quantity INT ); INSERT INTO operations (time_stamp, product, plan_week, quantity ) VALUES ("2020-01-01", "Product_A", "CW01", "125"), ("2020-01-01", "Product_B", "CW01", "300"), ("2020-01-01", "Product_C", "CW01", "700"), ("2020-01-01", "Product_D", "CW01", "900"), ("2020-03-15", "Product_A", "CW01", "570"), ("2020-03-15", "Product_C", "CW02", "150"), ("2020-03-15", "Product_E", "CW02", […]

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Linux Mastering Development

How do you read a .txt file with stdin .cc file and output it to your shell? pt.2 [duplicate]

//include file from a large library that gives us the ability to program in //C++ #include <stdio.h> #include <stdlib.h> // int main() { File * fPointer; //fpointer gives direction to which file needs to be opened this case mytxt fPointer = fopen("mytext.txt","r"); char singleLine[150]; //feof = file end of file //means keep looping till end […]

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Linux Mastering Development

How do you read a .txt file with stdin .cc file and output it to your shell?

I need some major pointers for having the contents of a .txt file to display on the shell using a .cc file code, but I am not sure where to start, I’ve been looking for a while and just can’t find anything. I am quite new to programming and just need a few push toward […]

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Mastering Development

Filling NaN values in pandas after grouping

This question is slightly different from usual filling of NaN values. Suppose I have a dataframe, where in I group by some category. Now I want to fill the NaN values of a column by using the mean value of that group but from different column. Let me take an example: a = pd.DataFrame({ ‘Occupation’: […]

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Mastering Development

Laravel factory cannot create because already has one

I want to create with factory in the test case but i got a validation error it say The name has already been taken. But how? It always refresh database every time the test start run. The factory $factory->define(Companies::class, function (Faker $faker) { return [ ‘name’ => $faker->unique()->company, ’email’ => $faker->email, ‘website’ => $faker->url, ]; […]

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Mastering Development

Generate variables with a multiple parameter function (with permutations of the parameter values)

I’m using function which has 3 components, alpha beta and switchpoint. I need to adjust these 3 components to create multiple permutations of those parameters. Here is some code to demonstrate a simple example where the parameters have already been given specific values a <- 2 # alpha b <- 2 # beta sp <- […]

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Mastering Development

Running Tensorflow frozen_graph through opencv fail with dim denoted by -1 in function ‘computeShapeByReshapeMask’

I am make an AI that have to differentiate one bottle form from any other forms and run the prediction through opencv the learning (running the learning file) go very well but when I try to run the prediction with openCV I always get the same error What am I doing wrong? The error when […]