# 几个有趣的R代码

313,702

## 此图代表我的心

[code lang="R"]
n=50000;
r=0.7;r_e=(1-r*r)^.5;
X=rnorm(n);
Y=X*r+r_e*rnorm(n);
Y=ifelse(X>0,Y,-Y);
plot(X,Y,col="pink")
[/code]

R语言脚本，有趣的图

## 我心因你而有爱

[code lang="R"]
n=50000;
r=0.7;r_e=(1-r*r)^.5;
X=rnorm(n);
Y=X*r+r_e*rnorm(n);
Y=ifelse(X>0,Y,-Y);
a<-sample(c(2,6,7,8),50000,T)
b<-sample(c(76,79,86,69),50000,T)
plot(X,Y,col=0)
text(X,Y,"lOVE",col=a)
[/code]

## 此图太猥琐了，运行结果就不贴上了

[code lang="R"]
xrange = c(-15, 15)
yrange = c(0, 16)
plot(0, xlim = xrange, ylim = yrange, type = "n")
#plot(xrange, yrange, type="n", ann=FALSE, axes=FALSE)
yr = seq(yrange[1], yrange[2], len = 50)
offsetFn = function(y) {
2 * sin(0 + y/3)
}
offset = offsetFn(yr)
leftE = function(y) {
-10 - offsetFn(y)
}
rightE = function(y) {
10 + offsetFn(y)
}
xp = c(leftE(yr), rev(rightE(yr)))
yp = c(yr, rev(yr))
polygon(xp, yp, col = "#ffeecc", border = NA)
h = 9
xt = seq(0, rightE(h), len = 100)
yt = log(1 + log(1 + log(xt + 1)))
yt = yt - min(yt)
yt = h * yt/max(yt)
x = c(leftE(h), rightE(h), rev(xt), -xt)
y = c(h, h, rev(yt), yt)
polygon(x, y, col = "red", border = NA)
[/code]

• xysheep 3

嘿嘿，挺有趣的。

我也来一段matlab代码：

x=[-1.65:0.00001:1.65];
hold on;
plot(x,(sqrt(cos(x)).*cos(200.*x)+sqrt(abs(x))-0.7).*(4-x.*x).^0.01,’r’)
axis([-5 5 -5 5]);
x=[-4.5:0.00001:4.5];
plot(x,sqrt(4.5-x.^2),x,-sqrt(4.5-x.^2))

• boya888 3

xysheep是来踢馆的？！ :razz:
matlab PK R

• nefarious 0

摸鱼的时候跑了一下第三个，还好领导没看到