get user input in the form of an integer

Question

Robert 2020-4-5

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回答： Walter Roberson 2021-4-21

I want to get user input in the form of an integer

I cant beleive i have to go to the forum to find something so simple with matlab

I want to ask a user for 2 numbers in one input

Why is this so HARD!!!!

For example

user_input[min,max] = input("Please enter min and max in the form of [min,max]");

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Abdulrhman Atef 2021-4-21

it is complicated but you can use this

test = 0;
 while test==0 
 
 XX = input('please enter 1 or 2 : ');
 if XX == 1
     test = 1;
 elseif XX == 2
     test =1;
 else
 
     disp(' please enter either 1 or 2')
 end
 
 end

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Answer 1

David Hill 2020-4-5

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编辑：David Hill 2020-4-5

The user inputs two integers and they are stored in the user_input array.

user_input = input('Please enter min and max in the form of [min,max]');

The user inputs are access via the array (user_input(1) or user_input(2)).

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David Hill 2020-4-5

编辑：David Hill 2020-4-5

I am only trying to help. You can use the excellent MATLAB help resources.

help input

If you want to restrict the input you can establish a while loop:

user_input=0;
while length(user_input)~=2 || ~isequal(user_input,floor(user_input))%this ensures only two inputs and only integers
    user_input = input('Please enter min and max in the form of [min,max]');
end

David Hill 2020-4-5

You need to enter:

[5,6]

Just like your statement says....in the form of [min,max]!

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Answer 2

Walter Roberson 2021-4-21

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https://ww2.mathworks.cn/matlabcentral/answers/515608-get-user-input-in-the-form-of-an-integer#answer_680615

You can use inputdlg() to request multiple boxes, and then str2double() the resulting cell array.

You can use input() and assume that the user will know to enclose the numbers in literal [ and ] characters.

You can use multiple input() prompts.

You can use input() with the 's' option to get a character vector, and post-process the character vector. For example

s = input('please enter min and max in the form [min, max]', 's');
n = str2double( regexp( regexprep(s, {'[[\]]', '[;,\s]+'}, {'', ' '}), '\s', 'split') ) );
if numel(n) ~= 2; error('blah'); end