The Wind Chill Factor (WCF) measures how cold it feels with a given air temperature T (in degrees Fahrenheit) and wind speed (V, in miles per hour). The formula is approximately

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guiWCF.m

function guiWCF

% GUI with Wind Chill Factor

% Format of call: guiWCF

% Does not return any values

% Create the GUI but make it invisible for now while 

% it is being initialized

f = figure('Visible', 'off','color','white','Position',...

 [300, 400, 500, 325]);

htempslider = uicontrol('Style','slider','Position', ...

 [150, 250, 200, 20],'Min',0,'Max',60,'Value',35,...

 'Callback',@update);

htemptext = uicontrol('Style','text','Position', ...

 [175, 275, 150, 18],'HorizontalAlignment',...

 'Center','BackgroundColor','white');

hvelslider = uicontrol('Style','slider','Position', ...

 [150, 150, 200, 20],'Min',0,'Max',30,'Value',15,...

 'Callback',@update);

hveltext = uicontrol('Style','text','Position', ...

 [175, 175, 150, 18],'HorizontalAlignment',...

 'Center','BackgroundColor','white');

hWCFtext = uicontrol('Style','text','Position', ...

 [175, 75, 150, 18],'HorizontalAlignment','Center',...

 'BackgroundColor','white');

% Put a name on it and move to the center of the screen

set(f,'Name','Simple GUI')

movegui(f,'center')

update()

% Now the GUI is made visible

set(f,'Visible','on');

 function update(source,eventdata)

 temp = get(htempslider,'Value');

 vel = get(hvelslider,'Value');

 set(htemptext,'String',...

 ['Temperature: ' num2str(round(temp)) ' F'])

 set(hveltext,'String',...

 ['Wind Velocity: ' num2str(round(vel)) ' MPH'])

 WCF =35.7+.6*round(temp)-35.7*(round(vel)).^.16+...

 0.43*round(temp)*(round(vel)).^(0.16);

 set(hWCFtext,'String',...

 ['Wind Chill Factor: ' num2str(round(WCF)) ' F'])

 end

end

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