根据其ID快速访问MATLAB结构数组 [英] Fast access to a MATLAB array of structs based on its id

问题描述

我有一个Matlab结构:

I have a Matlab struct:

a(1).x=54.23; a(1).y=2.3; a(1).col=32.221; a(1).id=1;
a(2).x=5.23; a(2).y=3.3; a(2).col=2.221; a(2).id=2;

...等等.现在，我想访问ID为73的a中的结构.我可以考虑进行for循环，但是事情是我必须基于id多次访问数组a的元素. Wat是用于此目的的最快的数据结构吗?像字典一样的Python也许可以工作，但是我不确定要实现它.指出一些代码示例将非常有帮助.

... and so on. Now i want to access the struct in a having id 73. I can think of doing a for loop but the thing is i have to access elements of array a several times like this based on id. Wat is the fastest data structure available for this purpose? Python like dictionary may work but i am not sure ow to implement it. Pointing out some code examples would be very helpful.

推荐答案

尝试一下:

id=[a.id];
a(id==73)

它不像字典那样高效，但是如果它足够快达到您的目的，就不值得进一步研究.

It's not as efficient as a dictionary, but if it's fast enough for your purposes it's not worth looking further.

a.id部分的计算结果是ID值的逗号分隔列表，这些ID值串联在一个数组中，然后可用于查找.

The a.id part evaluates to a comma-separated list of id values, which are concatenated in an array that you can then use for lookup.

这篇关于根据其ID快速访问MATLAB结构数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！