How can I get a vector from users?

2018 11 11
2 个回答
更新时间：2020 3 30
90 次查看（30 天）

0 个投票

I need to get a vector from user. But user should enter the values one by one (eg: 1st value is 25 2nd value is 22). When user enter the all values (n^2 values), I want to see the vector. I tried something but it is not really work. Please, give me some info about that. ****vector seems like that, vector = [45 10 2 20].* *
n=input('num of value')
costs=zeros(1,n^2);
for i=1:n^2
vector=input('enter the %d\n th value',i)
end
disp(vector)

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Stephen23
Stephen23 2018-11-13
编辑：Stephen23 2020-3-30
"But user should enter the values one by one"
That will not be a very user-friendly interface. Why not just write a function that accepts input arguments? This allows the function to be called efficiently from other code and allows it to be tested easily.

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回答（2 个）

Image Analyst
Image Analyst 2018-11-11

4 个投票

Try this:
% Enter as a string with numbers separted by commas or spaces
userResponse = input('enter the costs ', 's')
% Convert any commas to spaces.
userResponse = strrep(userResponse, ',', ' ')
% Convert strings to numbers.
numbers = sscanf(userResponse, '%f')

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Afiye Havva Geçgel
Afiye Havva Geçgel 2018-11-12
编辑：Afiye Havva Geçgel 2018-11-12
This is not fit my code format. For example the below vector is used in my code but I want to this vector from user. Firstly user enter the num of nodes and I create a vector which includes n^2 cost value. Thats why I am trying to use for loop to say fill the vector i=1:n^2 but I can not fill one by one.
costs = [100 10 2 20 100 100 5 100 100 100 100 7 100 100 100 100 ]
Image Analyst
Image Analyst 2018-11-12
Why? Why do it the more complicated way? Is this homework and you were asked to do it via a for loop?
Afiye Havva Geçgel
Afiye Havva Geçgel 2018-11-12
Not exactly, but after i get the vector, i pick some values inside the vector.
Image Analyst
Image Analyst 2018-11-12
You can do that with the way I gave you. Most good MATLAB programmers would not do it the way your originally said.

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Ali Baran Özpolat
Ali Baran Özpolat 2020-3-29

1 个投票

I couldn't understand your question, clearly. Do you mean to create a code that calculate the power of numbers and put in a vector? But, if you want to create your own vector, please try this;
m = input('m= ');
for i= 1:1
for j=1:m
a(i,j)= input('elements= ');
v=[a]
end
end
In this code, you can create your own vector by prompt "m" value. For example, if you type m= 5, you will have 1x5 vector. Then, you can start to prompt your own integers. If you want to create a matrix with the same method, you use this code:
n = input('n= ');
m = input('m= ');
for i= 1:n
for j=1:m
a(i,j)= input('elements= ')
end
end

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