MATLAB面试有问题吗? [英] MATLAB interview questions?

问题描述

我在 MATLAB 中编程了很多年，但是在过去的几年中切换到仅使用R，所以我有点不习惯.我今天正在面试一位自称是MATLAB专家的候选人.

I programmed in MATLAB for many years, but switched to using R exclusively in the past few years so I'm a little out of practice. I'm interviewing a candidate today who describes himself as a MATLAB expert.

我应该问什么MATLAB面试问题?

What MATLAB interview questions should I ask?

其他一些具有相关资源的网站:

Some other sites with resources for this:

• 在Wilmott上的"Matlab面试问题"
• 在GlobaleGuildLine上"MATLAB问答"
• <在CoolInterview上"Matlab面试问题"

• "Matlab interview questions" on Wilmott
• "MATLAB Questions and Answers" on GlobaleGuildLine
• "Matlab Interview Questions" on CoolInterview

推荐答案

这有点主观，但我会咬...;)

This is a bit subjective, but I'll bite... ;)

对于自称是MATLAB专家的人，以下是我个人希望他们能够在访谈中说明的一些内容:

For someone who is a self-professed MATLAB expert, here are some of the things that I would personally expect them to be able to illustrate in an interview:

• 如何将算术运算符用于矩阵或基于元素的操作.
• 熟悉所有基本的数据类型以及如何轻松地在它们之间进行转换.
• 全面了解矩阵索引和赋值，无论是逻辑索引，线性索引还是下标索引(基本上，操纵多维数组的功能.
• 对优化的理解和常规用法，例如矢量化.
• 对如何处理文件I/O的理解用于多种情况.
• 熟悉处理图形和所有基本绘图功能.

• 对 MATLAB 中的函数，尤其是嵌套函数.具体来说，给出以下功能:

• How to use the arithmetic operators for matrix or element-wise operations.
• A familiarity with all the basic data types and how to convert effortlessly between them.
• A complete understanding of matrix indexing and assignment, be it logical, linear, or subscripted indexing (basically, everything on this page of the documentation).
• An ability to manipulate multi-dimensional arrays.
• The understanding and regular usage of optimizations like preallocation and vectorization.
• An understanding of how to handle file I/O for a number of different situations.
• A familiarity with handle graphics and all of the basic plotting capabilities.

• An intimate knowledge of the types of functions in MATLAB, in particular nested functions. Specifically, given the following function:

function fcnHandle = counter
  value = 0;
  function currentValue = increment
    value = value+1;
    currentValue = value;
  end
  fcnHandle = @increment;
end

在下面的代码中，它们应该能够告诉您变量output的内容是什么，而无需在MATLAB中运行它:

They should be able to tell you what the contents of the variable output will be in the following code, without running it in MATLAB:

>> f1 = counter();
>> f2 = counter();
>> output = [f1() f1() f2() f1() f2()];  %# WHAT IS IT?!

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