“””Initialize an ellipsoid””” from math import * import numpy as np importsys class Geoid: def __init__(self, a, f): “”” Parameters ———- a : float, radius in meters f: float, flattening “”” self.a = a self.f = f self.e2 = f * (2 – f) self.e2m = (1 – f)**2 self.e2a = abs(self.e2) self.e4a = self.e2**2 […]
Tag: cartesian
04-Echarts simplified series: Cartesian coordinate system xAxis and yAxis
For the X-axis and Y-axis in the graph, there are at most two x-axes in a grid. More than two axes need to be configured through the offset property. 1. xAxis and yAxis attribute configuration of coordinate system option={ xAxis:[ { id:’1′, //Component ID show:true, //Whether to display the x/y axis gridIndex:0, //The index of […]
R language uses Cartesian product and ggvenn() function to draw the Venn distribution diagram of N*N*N*N color combinations
library(ggvenn) set.seed(20190708) genes <- paste(“gene”,1:1000,sep=””) x <- list( A = sample(genes,300), B = sample(genes,525), C = sample(genes,440), D = sample(genes,350) ) ggvenn( x, fill_color = c(“aliceblue”, “slateblue”, “springgreen”, “thistle”), stroke_size = 0.5, set_name_size = 4 ) According to the Cartesian product principle, the color of each partition of the Venn diagram should be different, which […]
Cartesian coordinate image and polar coordinate image conversion C++
C++ between Cartesian coordinate image and polar coordinate image class implementation call example Show results The original image and the polar coordinate image generated by its conversion The polar plot generated above and the Cartesian plot generated by its inversion Custom conversion —- Polar coordinate original map and Cartesian coordinate map generated after its conversion […]
MATLAB Modeling Analysis of 4-DOF Cartesian Coordinates and 6-DOF Series Robots
Make a summary of the recent course report and write some records, using the MATLAB toolbox robotic_toolbox (10.4) You need to install it yourself. 1. Cartesian robot A sketch that is not professionally drawn. There is an approximate indicator It is very convenient to use the improved DH coordinate method to model (post method) clc; […]
Hive Case of Big Data Development 10- Cartesian Product Optimization of Large Tables
Article directory 1. Problem description 2. Solutions 2.1 Data Skew 2.2 SQL rewriting 1: Changing from analytical functions to conventional writing 2.3 Analyze data distribution 2.4 SQL Rewriting 2: Rewriting refer to: 1. Problem description Description of requirements: Table overview: dt time partition data_source data source category start_date time data_count the number of current time […]
JavaFX drawing – Cartesian coordinate system
JavaFX Drawing – Cartesian Coordinate System 1. Actual effect 2. Analysis 1. The Cartesian coordinate system as shown in the figure is composed of three main parts ①Solid triangle, that is, the positive direction of the coordinate axis ② Coordinate axes, that is, a horizontal line and a vertical line ③Coordinate origin (no need to […]
How to efficiently generate product specification attribute combinations? –Exploring the Cartesian Product Algorithm
1. Foreword As long as you are doing e-commerce related products, such as shopping apps, shopping websites, etc., you will encounter such a scenario. Each product corresponds to multiple specifications. Users can choose the product they want according to different specifications. . We often use this function in our daily life. However, such a seemingly […]
java8 stream-calculate sku cartesian product
/** * Calculate the Cartesian product of sku * @param lists * @return */ public List<SpecListDTO.SpecItem> descartes(List<List<GoodsAttribute.AttributeItem>> lists) { List<SpecListDTO. SpecItem> tempList = new ArrayList<>(); for (List<GoodsAttribute. AttributeItem> list : lists) { if (tempList. isEmpty()) { tempList = list. stream(). map(item -> { return new SpecListDTO.SpecItem(item.getId(), item.getName()); }).collect(Collectors.toList()); } else { tempList = tempList. stream() […]