How to compute given values in the edit text box with a formula just by using a button?

This is the case statement of the program I would like to accomplish.

1. Ask for the value of different variables such as (Initial Velocity, Initial Height, Angle)
2. Choose what type of unit using the drop down menu (MKS or FPS)
3. Push a button to provide values for (Maximum Height, Distance, Time of Flight, Gravity and to Plot)

My code is here attached. classdef app1 < matlab.apps.AppBase

% Properties that correspond to app components

properties (Access = public)

UIFigure matlab.ui.Figure

InitialVelocitymsEditFieldLabel matlab.ui.control.Label

InitialVelocitymsEditField matlab.ui.control.NumericEditField

InitialHeightmEditFieldLabel matlab.ui.control.Label

InitialHeightmEditField matlab.ui.control.NumericEditField

AngledegreesEditFieldLabel matlab.ui.control.Label

AngledegreesEditField matlab.ui.control.NumericEditField

UnitDropDownLabel matlab.ui.control.Label

UnitDropDown matlab.ui.control.DropDown

MaximumHeightmEditFieldLabel matlab.ui.control.Label

MaximumHeightmEditField matlab.ui.control.NumericEditField

DistancemEditFieldLabel matlab.ui.control.Label

DistancemEditField matlab.ui.control.NumericEditField

TimeofFlightsEditFieldLabel matlab.ui.control.Label

TimeofFlightsEditField matlab.ui.control.NumericEditField

GravitymsEditFieldLabel matlab.ui.control.Label

GravitymsEditField matlab.ui.control.NumericEditField

PlotButton matlab.ui.control.Button

UIAxes matlab.ui.control.UIAxes

end

% Callbacks that handle component events

methods (Access = private)

% Button pushed function: PlotButton

function PlotButtonPushed(app, event)

v = str2char(input(app.InitialVelocitymsEditField,'string'));

h = str2char(input(app.InitialHeightmEditField,'string'));

a = str2char(input(app.AngledegreesEditField,'string'));

d = str2char(input(app.DistancemEditField,'string'));

if ~isempty(v) && ~isempty(h) && ~isempty(a)

d = v.^(2).*(sin(a))/app.GravitymsEditField;

end

value = app.UnitDropDown.Value;

if strcmpi(value,'FPS')

app.GravitymsEditField.Value =-9.81;

else if strcmpi(value,'MKS')

app.GravitymsEditField.Value =-32.174;

end

end

end

% Value changed function: MaximumHeightmEditField

function MaximumHeightmEditFieldValueChanged(app, event)

value = app.MaximumHeightmEditField.Value;

end

end

% Component initialization

methods (Access = private)

% Create UIFigure and components

function createComponents(app)

% Create UIFigure and hide until all components are created

app.UIFigure = uifigure('Visible', 'off');

app.UIFigure.Position = [100 100 772 643];

app.UIFigure.Name = 'MATLAB App';

% Create InitialVelocitymsEditFieldLabel

app.InitialVelocitymsEditFieldLabel = uilabel(app.UIFigure);

app.InitialVelocitymsEditFieldLabel.Tag = 'v';

app.InitialVelocitymsEditFieldLabel.HorizontalAlignment = 'right';

app.InitialVelocitymsEditFieldLabel.Position = [8 521 109 22];

app.InitialVelocitymsEditFieldLabel.Text = 'Initial Velocity (m/s)';

% Create InitialVelocitymsEditField

app.InitialVelocitymsEditField = uieditfield(app.UIFigure, 'numeric');

app.InitialVelocitymsEditField.Tag = 'v0';

app.InitialVelocitymsEditField.Position = [132 521 100 22];

% Create InitialHeightmEditFieldLabel

app.InitialHeightmEditFieldLabel = uilabel(app.UIFigure);

app.InitialHeightmEditFieldLabel.Tag = 'h';

app.InitialHeightmEditFieldLabel.HorizontalAlignment = 'right';

app.InitialHeightmEditFieldLabel.Position = [24 491 93 22];

app.InitialHeightmEditFieldLabel.Text = 'Initial Height (m)';

% Create InitialHeightmEditField

app.InitialHeightmEditField = uieditfield(app.UIFigure, 'numeric');

app.InitialHeightmEditField.Tag = 'h';

app.InitialHeightmEditField.Position = [132 491 100 22];

% Create AngledegreesEditFieldLabel

app.AngledegreesEditFieldLabel = uilabel(app.UIFigure);

app.AngledegreesEditFieldLabel.HorizontalAlignment = 'right';

app.AngledegreesEditFieldLabel.Position = [26 460 91 22];

app.AngledegreesEditFieldLabel.Text = 'Angle (degrees)';

% Create AngledegreesEditField

app.AngledegreesEditField = uieditfield(app.UIFigure, 'numeric');

app.AngledegreesEditField.Tag = 'a';

app.AngledegreesEditField.Position = [132 460 100 22];

% Create UnitDropDownLabel

app.UnitDropDownLabel = uilabel(app.UIFigure);

app.UnitDropDownLabel.HorizontalAlignment = 'right';

app.UnitDropDownLabel.Position = [70 420 30 22];

app.UnitDropDownLabel.Text = 'Unit ';

% Create UnitDropDown

app.UnitDropDown = uidropdown(app.UIFigure);

app.UnitDropDown.Items = {'FPS', 'MKS'};

app.UnitDropDown.Position = [115 420 100 22];

app.UnitDropDown.Value = 'FPS';

% Create MaximumHeightmEditFieldLabel

app.MaximumHeightmEditFieldLabel = uilabel(app.UIFigure);

app.MaximumHeightmEditFieldLabel.Tag = 'mh';

app.MaximumHeightmEditFieldLabel.HorizontalAlignment = 'right';

app.MaximumHeightmEditFieldLabel.Position = [16 374 117 22];

app.MaximumHeightmEditFieldLabel.Text = 'Maximum Height (m)';

% Create MaximumHeightmEditField

app.MaximumHeightmEditField = uieditfield(app.UIFigure, 'numeric');

app.MaximumHeightmEditField.ValueChangedFcn = createCallbackFcn(app, @MaximumHeightmEditFieldValueChanged, true);

app.MaximumHeightmEditField.Tag = 'mh';

app.MaximumHeightmEditField.Position = [148 374 100 22];

% Create DistancemEditFieldLabel

app.DistancemEditFieldLabel = uilabel(app.UIFigure);

app.DistancemEditFieldLabel.Tag = 'd';

app.DistancemEditFieldLabel.HorizontalAlignment = 'right';

app.DistancemEditFieldLabel.Position = [59 341 74 22];

app.DistancemEditFieldLabel.Text = 'Distance (m)';

% Create DistancemEditField

app.DistancemEditField = uieditfield(app.UIFigure, 'numeric');

app.DistancemEditField.Tag = 'd';

app.DistancemEditField.Position = [148 341 100 22];

% Create TimeofFlightsEditFieldLabel

app.TimeofFlightsEditFieldLabel = uilabel(app.UIFigure);

app.TimeofFlightsEditFieldLabel.HorizontalAlignment = 'right';

app.TimeofFlightsEditFieldLabel.Position = [38 311 95 22];

app.TimeofFlightsEditFieldLabel.Text = 'Time of Flight (s)';

% Create TimeofFlightsEditField

app.TimeofFlightsEditField = uieditfield(app.UIFigure, 'numeric');

app.TimeofFlightsEditField.Tag = 't';

app.TimeofFlightsEditField.Position = [148 311 100 22];

% Create GravitymsEditFieldLabel

app.GravitymsEditFieldLabel = uilabel(app.UIFigure);

app.GravitymsEditFieldLabel.HorizontalAlignment = 'right';

app.GravitymsEditFieldLabel.Position = [54 280 80 22];

app.GravitymsEditFieldLabel.Text = 'Gravity (m/s^)';

% Create GravitymsEditField

app.GravitymsEditField = uieditfield(app.UIFigure, 'numeric');

app.GravitymsEditField.Tag = 'g';

app.GravitymsEditField.Position = [149 280 99 22];

% Create PlotButton

app.PlotButton = uibutton(app.UIFigure, 'push');

app.PlotButton.ButtonPushedFcn = createCallbackFcn(app, @PlotButtonPushed, true);

app.PlotButton.Position = [93 240 100 22];

app.PlotButton.Text = 'Plot';

% Create UIAxes

app.UIAxes = uiaxes(app.UIFigure);

title(app.UIAxes, 'Title')

xlabel(app.UIAxes, 'X')

ylabel(app.UIAxes, 'Y')

zlabel(app.UIAxes, 'Z')

app.UIAxes.Position = [290 341 392 261];

% Show the figure after all components are created

app.UIFigure.Visible = 'on';

end

end

% App creation and deletion

methods (Access = public)

% Construct app

function app = app1

% Create UIFigure and components

createComponents(app)

% Register the app with App Designer

registerApp(app, app.UIFigure)

if nargout == 0

clear app

end

end

% Code that executes before app deletion

function delete(app)

% Delete UIFigure when app is deleted

delete(app.UIFigure)

end

end

end

Answer 1

[Rishabh Singh]

Hey Carlo,

According to me you wish to calculate few parameter based upon the input fields. I would suggest few minor corrections to your code for function "PlotButtonPushed". More information can be found on following documentation.

v = app.InitialVelocitymsEditField.Value;

h = app.InitialHeightmEditField.Value;

a = deg2rad(app.AngledegreesEditField.Value);

d = app.DistancemEditField.Value;

if(strcmpi(app.UnitDropDown.Value, 'FPS'))

app.GravitymsEditField.Value = -9.81;

elseif strcmpi(app.UnitDropDown.Value, 'MKS')

app.GravitymsEditField.Value =-32.174;

end

app.DistancemEditField.Value = v.^(2).*(sin(a))/app.GravitymsEditField.Value;

You could add your further calculations for "Maximum Height", "Time of Flight" in a similar fashion.

Currently I am not sure of what exactly you want to plot, if you could provide more information then I will be able to help you further.

Hope this helps.