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Racket图的语法(Syntax for Racket plot)

 我正在尝试关注如何使用2D绘图的球拍文档 。 不幸的是，我似乎无法让它工作（可能是简单的事情） 
 

 我的代码是： 
 

#lang racket
(require plot)
(plot (function sin (-pi) pi #:label "y = sin(x)"))

 

 而错误是： 
 

compile: unbound identifier in module in: function

 

 我是一个球拍/ lisp新手，所以如果很明显，我只是没有意识到这一点。 我也试过插入(require racket/gui/base)以及(plot-new-window? #t)但那些似乎也没有。 
 

 我在Ubuntu 12.04上使用racket v5.1.3。 我没有使用Dr. Racket。 

I am trying to follow the racket documentation on how to use 2D plotting. Unfortunately, I can't seem to be able to get it to work (probably something simple)
 

My code is:
 

#lang racket
(require plot)
(plot (function sin (-pi) pi #:label "y = sin(x)"))

 

and the error is:
 

compile: unbound identifier in module in: function

 

I am a racket/lisp newbie, so if it is obvious, I just don't realize it. I have also tried inserting (require racket/gui/base) as well as (plot-new-window? #t) but those don't seem to do the trick either.
 

I'm using racket v5.1.3 on Ubuntu 12.04. I am not using Dr. Racket.

原文：https://stackoverflow.com/questions/15727861
更新时间：2022-04-28 06:04

最满意答案

 你可以这样做： 
 

     
 
  1.  删除position: relative .blabla 
    2.  
 
  2.  设置position: absolute .wrapper ， .parent和.child 。 
    3.  

 

 

 
 
 
  
.wrapper {
  position: absolute;
  width: 1280px;
}
.parent {
  position: absolute;
}
.child {
  position: absolute;
  width: 960px;
}
.blabla {
  overflow: hidden;
  background-color: red;
  height: 90px;
  margin: 10px;
  padding: 10px;
}
.bleble {
  height: 10px;
  width: 90px;
  background-color: blue;
}
.blibli {
  height: 150px;
  width: 60px;
  background-color: orange;
}
body {
  height: 900px;
  background-color: lightgreen;
}
 
  
<body>
  <ul>
    <li class="blabla span6">
      asdfasdf
      <br>
      <span>asdfas</span>
      <div class="bleble"></div>
      <br>
      <div class="wrapper">
        <div class="parent">
          <div class="child">
            <div class="blibli">aabasdg</div>
          </div>
        </div>
      </div>


    </li>
  </ul>

</body>
 
 
 

 

 

 CODEPEN 

You can do this by:
 

     
 
  1. Removing position: relative from .blabla
    2.  
 
  2. Setting position: absolute on .wrapper, .parent and .child.
    3.  

 

 

 
 
 
  
.wrapper {
  position: absolute;
  width: 1280px;
}
.parent {
  position: absolute;
}
.child {
  position: absolute;
  width: 960px;
}
.blabla {
  overflow: hidden;
  background-color: red;
  height: 90px;
  margin: 10px;
  padding: 10px;
}
.bleble {
  height: 10px;
  width: 90px;
  background-color: blue;
}
.blibli {
  height: 150px;
  width: 60px;
  background-color: orange;
}
body {
  height: 900px;
  background-color: lightgreen;
}
 
  
<body>
  <ul>
    <li class="blabla span6">
      asdfasdf
      <br>
      <span>asdfas</span>
      <div class="bleble"></div>
      <br>
      <div class="wrapper">
        <div class="parent">
          <div class="child">
            <div class="blibli">aabasdg</div>
          </div>
        </div>
      </div>


    </li>
  </ul>

</body>
 
 
 

 

 

CODEPEN

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