Traping Error user input
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
n=inputdlg('Please input a number more than or equal one:')
I would like to trap the user if they input anything other than numbers more than 1. I have tried loop,isnumeric but they all don't work overally.
Any ideas?
Thank you
0 Commenti
Risposta accettata
Honglei Chen
il 13 Apr 2012
Is this what you want?
n=inputdlg('Please input a number more than or equal one:')
while isempty(str2num(n{1})) || str2num(n{1})<1
n=inputdlg('Please input a number more than or equal one:')
end
5 Commenti
Honglei Chen
il 15 Apr 2012
n=inputdlg({'Please input a number more than or equal one:';'P'})
while any(cellfun(@isempty,cellfun(@str2num,n,'UniformOutput',false))) || ...
any(cellfun(@lt,cellfun(@str2num,n,'UniformOutput',false),...
num2cell(ones(numel(n),1))))
h = errordlg;
waitfor(h)
n=inputdlg({'Please input a number more than or equal one:';'P'})
end
Più risposte (1)
Image Analyst
il 13 Apr 2012
Try this:
clc; % Clear the command window.
workspace; % Make sure the workspace panel is showing.
fontSize = 20;
format compact;
% Initialize flag to keep going or not.
keepGoing = true;
userPrompt = 'Enter a number greater than 1';
defaultValue = 42;
while keepGoing
% Ask user for a number.
caUserInput = inputdlg(userPrompt, 'Enter the number',1,{num2str(defaultValue)});
usersValue = round(str2double(cell2mat(caUserInput)));
% Check for a valid integer.
if isnan(usersValue)
% They didn't enter a number.
% They clicked Cancel, or entered a character, symbols, or something else not allowed.
break;
end
% See if it's > 1
if usersValue > 1
message = sprintf('Success!\n you entered %f.\n', usersValue);
keepGoing = false; % Bail out
else
message = sprintf('Try again. You entered %f.\n%s', ...
usersValue, userPrompt);
% Keep going.
end
uiwait(msgbox(message));
end
4 Commenti
Image Analyst
il 14 Apr 2012
It does not stall. It works fine. I just copied it and ran it again. I was able to enter lots of numbers less than 1 and it kept reprompting the user to enter a number >1. When I finally did enter a number > 1, it exited the while loop. It does exactly what you asked for. If it doesn't, then you must have altered it and broken it.
Vedere anche
Categorie
Scopri di più su Logical in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!