I learned to making histogram and CDF/ogive. There is a code looks like:

```
xs <- seq(floor(min(x)), ceiling(max(x)),0.1)
```

*x* is some vector in integers. What if i write the code without *floor/ceiling* function?

also, can anybody explain aboud * ecdf* function? I have code like this:

```
plot(xs,ecdf(x)(xs),type="l",
xlab="Height in Inches, ylab="F(x)")
```

if you don't mind, please explain about *type* function too