It's simple to adapt. Not sure you tried to adapt it since it's the same snippet I gave you before. Anyway, try this:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
% Ask user for two floating point numbers.
defaultValue = {'5', '2', '3'};
titleBar = 'Enter values';
userPrompt = {'Enter x : ', 'Enter y: ', 'Enter Radius'};
caUserInput = inputdlg(userPrompt, titleBar, 1, defaultValue);
if isempty(caUserInput),return,end % Bail out if they clicked Cancel.
% Convert to floating point from string.
x = str2double(caUserInput{1})
y = str2double(caUserInput{2})
radius = str2double(caUserInput{3})
% Check usersValue1 for validity.
if isnan(x)
% They didn't enter a number.
% They clicked Cancel, or entered a character, symbols, or something else not allowed.
% Convert the default from a string and stick that into usersValue1.
x = str2double(defaultValue{1});
message = sprintf('I said it had to be a number.\nTry replacing the user.\nI will use %.2f and continue.', x);
uiwait(warndlg(message));
end
% Do the same for usersValue2
% Check usersValue2 for validity.
if isnan(y)
% They didn't enter a number.
% They clicked Cancel, or entered a character, symbols, or something else not allowed.
% Convert the default from a string and stick that into usersValue2.
y = str2double(defaultValue{2});
message = sprintf('I said it had to be a number.\nTry replacing the user.\nI will use %.2f and continue.', y);
uiwait(warndlg(message));
end
% Do the same for usersValue3
% Check usersValue3 for validity.
if isnan(radius)
% They didn't enter a number.
% They clicked Cancel, or entered a character, symbols, or something else not allowed.
% Convert the default from a string and stick that into usersValue2.
radius = str2double(defaultValue{3});
message = sprintf('I said it had to be a number.\nTry replacing the user.\nI will use %.2f and continue.', y);
uiwait(warndlg(message));
end
angles = linspace(0, 2 * pi, 400);
xCircle = x + radius*cos(angles);
yCircle = y + radius*sin(angles);
plot(xCircle, yCircle, 'r-', 'LineWidth', 2)
grid on;
axis equal
Anyway, if you're using app designer you wouldn't use inputdlg() - you'd place edit text boxes on the window and get the numbers from there, like
x = str2double(app.edtX.Text);
y = str2double(app.edtY.Text);
radius = str2double(app.edtRadius.Text);
