Question

【matlab】数组赋值，用户输入

输入一维数组的5个元素，我是这样写的，因为受C++影响太深。。。
for i=1:5
x(i)=input('输入元素');
end;
老师给了批注，如下：
x=input('vector_');

难道可以直接一次性输入数组的5个元素吗？我试了几次，没有试出来。。。
请大家帮帮我呀。

Answer 1

可能直接用：

x=input('输入元素：','s');

MATLAB帮助文件：

input：

Request user input

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Syntax

• x = input(prompt)

  example

• str = input(prompt,'s')

  example

Description

example

x = input(prompt) displays the text in prompt and waits for the user to input a value and press the Return key. The user can enter expressions, like pi/4 or rand(3), and can use variables in the workspace.

• If the user presses the Return key without entering anything, then input returns an empty matrix.

• If the user enters an invalid expression at the prompt, then MATLAB® displays the relevant error message, and then redisplays the prompt.

example

str = input(prompt,'s') returns the entered text as a string, without evaluating the input as an expression.

Examples

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Request Numeric Input or Expression

Request a numeric input, and then multiply the input by 10.

• prompt = 'What is the original value? ';


• x = input(prompt)


• y = x*10



At the prompt, enter a numeric value or array, such as 42.

• x =


•    42



• y =


•   420



The input function also accepts expressions. For example, rerun the code.

• prompt = 'What is the original value? ';


• x = input(prompt)


• y = x*10



At the prompt, enter magic(3).

• x =


•     8     1     6


•     3     5     7


•     4     9     2



• y =


•    80    10    60


•    30    50    70


•    40    90    20



Request Unprocessed Text Input

Request a simple text response that requires no evaluation.

• prompt = 'Do you want more? Y/N [Y]: ';


• str = input(prompt,'s');if isempty(str)


•    str = 'Y';end



The input function returns the text exactly as typed. If the input is empty, this code assigns a default value, 'Y', to the output string, str.

Input Arguments

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prompt — Text displayed to the userstring

Text displayed to the user, specified as a string.

To create a prompt that spans several lines, use '\n' to indicate each new line. To include a backslash ('\') in the prompt, use '\\'.

Output Arguments

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x — Result calculated from inputarray

Result calculated from input, returned as an array. The type and dimensions of the array depend upon the response to the prompt.

str — Exact text of inputstring

Exact text of the input, returned as a string.

str = input(prompt,'s') returns the entered text as a string, without evaluating the input as an expression.

Answer 2

x=input('请输入一个数组：\n')

（之后在命令行输入：）
[2009 10 26]

Answer 3

x=input('vector-');
输入时要带中括号，例如[1 2 3 4 5]