R怎么画函数y=tanx+siny+x的图

A contour plot is just a 2D way of presenting a 3D plot by drawing curves on which z=f(x,y) has the same value. Here the option "levels = 0" ensures the points (x, y) on the curve has the z value of 0. Normally more than one such curves will be drawn to show different contour curves corresponding to different z values, or levels. And I added the option "labcex=0" and "labels = """ just to eliminate the labels completely. Otherwise there will be "0" or short breaks on the curve which I hate.

另外运行此程序后， 我的显示中间为 白板。怪~

I have no clue why this happened. But I did have issues running the "outer" function in the scripts where huge amount of memory was required. I had to change the resolution of both x and y dimensions to produce the plot.

zhangyangsmith 发表于 2014-2-25 20:08
A contour plot is just a 2D way of presenting a 3D plot by drawing curves on which z=f(x,y) has the  ...

x,y的维度，已经改小了。但仍然不行。看不到中间的图

好比现在这个：
my.fun <- function(x,y){y - sin(y) - x - tan(x)}
x<-seq(-5, 5, by = 0.01)
y<-seq(-50, 50, by = 0.1)
z<-outer(x,y,my.fun)
options(max.contour.segments=50000)
contour(x, y, z,levels=0, labels="", labcex=0, xlab = "x", ylab = "y")

Will this work?

1. contour(x, y, z, levels = 0, drawlabels = 0, xlab = "x", ylab = "y")

复制代码

给个截图你看吧

jmpamao 发表于 2014-2-24 16:58
这个 模拟就ok了
比如
x

请问如果只是画y=cosx的代码是怎样的？