MATLAB: How to check that input is numerical

I'm trying to create a program that will prompt the user for a numerical input, for example: 'What age are you?'. I know how to prompt the user to ask for an input, but I want to know how to check the answer to make sure it is a numerical figure, ie to stop the user putting in the answer 'twelve'. Any help would be greatly appreciated.

Seán

Best Answer

str2num( inputVal )

will return the number if it is valid or empty otherwise so a

if ~isempty( str2num( inputVal ) )

test would check it is a number, or remove the ~ if you want to check for not a number and give an error message in that case.

Related Solutions

MATLAB: How to create a question that loops until it receives correct answer

age = 0;
ageans = 21;
while age ~= ageans
     prompta = 'What age is Seán? ';
     age = (input(prompta));
     if age == ageans
        disp('Correct!');
     else
        disp('Wrong');
     end 
end

MATLAB: Nested IF-ELSE statement

Hint: input(), rem(), sprintf(), while

message = sprintf('>>>>> Enter an integer (0-9)\n blah blah fubar snafu lorem ipsum : ');

Change message passed to input depending on what their input was.

response = '0';
message = sprintf(.....
while response ~= 'x'
    response = input(...........
    if................
        message = ...........
    elseif ...........
    end
end

See if you can finish it.

Best Answer

Related Solutions

MATLAB: How to create a question that loops until it receives correct answer

MATLAB: Nested IF-ELSE statement

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