Cartesian point
时间: 2023-10-26 20:08:04 浏览: 81
A Cartesian point, also known as a coordinate point, is a point in a two-dimensional space defined by its position along the x and y axes. The x-axis represents the horizontal position and the y-axis represents the vertical position. The point is represented in the form (x, y), where x is the distance of the point from the y-axis and y is the distance of the point from the x-axis. This system is named after the French mathematician and philosopher, René Descartes, who developed the Cartesian coordinate system in the 17th century.
相关问题
DELPHI Point(X, Y)
Point(X, Y) in Delphi is a function that returns a TPoint record type with the coordinates specified by the parameters X and Y.
The TPoint record type contains two fields: X and Y, both of type Integer. This record type is used to represent a point in a two-dimensional Cartesian coordinate system.
Example Usage:
var
MyPoint: TPoint;
begin
MyPoint := Point(10, 20);
// MyPoint.X = 10, MyPoint.Y = 20
end;
R语言geom_point()函数如何设置坐标范围
你可以使用ggplot2中的coord_cartesian()函数来设置坐标范围。在使用geom_point()函数之前,先使用coord_cartesian()函数来设置坐标范围。例如,假设你要绘制一个散点图,并且想要将x轴的坐标范围设置为1到10,y轴的坐标范围设置为20到30,可以按照如下方式进行设置:
```
library(ggplot2)
# 创建数据框
df <- data.frame(x = c(1, 2, 3, 4, 5),
y = c(22, 24, 25, 28, 29))
# 绘制散点图,并设置坐标范围
ggplot(df, aes(x, y)) +
geom_point() +
coord_cartesian(xlim = c(1, 10), ylim = c(20, 30))
```
在上述代码中,使用coord_cartesian()函数设置了x轴的坐标范围为1到10,y轴的坐标范围为20到30。这样绘制出的散点图的坐标轴范围就会按照你的设置进行定义。