首页 \ 问答 \ 生成1D NumPy连续范围数组(Generate 1D NumPy array of concatenated ranges)

生成1D NumPy连续范围数组(Generate 1D NumPy array of concatenated ranges)

 我想生成以下数组a ：  
nv = np.random.randint(3, 10+1, size=(1000000,))
a = np.concatenate([np.arange(1,i+1) for i in nv])
 
 因此，输出将是 - 像 -  
[0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 0, 1, 2, 3, 4, 5, 0, ...]
 
 有没有更好的方法呢？ 

I want to generate a following array a:  
nv = np.random.randint(3, 10+1, size=(1000000,))
a = np.concatenate([np.arange(1,i+1) for i in nv])
 
Thus, the output would be something like - 
[0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 0, 1, 2, 3, 4, 5, 0, ...]
 
Does there exist any better way to do it?

原文：https://stackoverflow.com/questions/41310119

更新时间：2022-11-09 10:11

最满意答案

 你可能想要使用CSS属性background-image （和速记background ）而不是嵌入了图像的div。  
 这是一个简单的例子：  
 HTML  
<ul>
    <li>Apples</li>
    <li>Oranges</li>
    <li>Bananas</li>
</ul>
 
 CSS  
li {
    height: 50px;
    padding-left: 60px;
    margin: 10px;
    background: url(http://placehold.it/50x50) no-repeat;       
}
 
 演示 

You're probably going to want to use the CSS property background-image (and the shorthand background) rather than a div with an image embedded in it. 
Here is a simple example: 
HTML 
<ul>
    <li>Apples</li>
    <li>Oranges</li>
    <li>Bananas</li>
</ul>
 
 CSS 
li {
    height: 50px;
    padding-left: 60px;
    margin: 10px;
    background: url(http://placehold.it/50x50) no-repeat;       
}
 
Demo

生成1D NumPy连续范围数组(Generate 1D NumPy array of concatenated ranges)

最满意答案

相关问答

多个背景图像定位(Multiple background images positioning)[2022-04-09]

同一图像和定位的多个实例(Multiple instances of same image & positioning)[2023-08-30]

多个随机图像旋转实例(Multiple instances of random image rotation)[2022-09-10]

DrawArc上的图像，定位问题(DrawArc on image, positioning issue)[2022-02-04]

在图像上定位超链接(Positioning hyperlink over an image)[2021-10-30]

IE图像定位问题(IE Image Positioning Issue)[2021-09-14]

SSRS定位图像(SSRS positioning of an image)[2021-10-25]

使用绝对定位来解决问题(Getting around using Absolute Positioning)[2022-11-07]

使用Bootstrap进行图像定位(Image positioning using Bootstrap)[2021-12-02]

定位由svg屏蔽的多个图像(positioning multiple images that are masked by an svg)[2023-02-19]

相关文章

最新问答