Plz write codes using only MATLAB Run this program with the inputs of s = \'Amaz

Question

Plz write codes using only MATLAB

Run this program with the inputs of s = 'Amazon', iwidth = 5, dt = 0.1

10. Ticker text. Write a function tickerText(s,iwidth, dt) that displays the string s scrolling through a text window with width iwidth. The parameter dt gives the length of the pause after piece of text is displayed. For example, the following would be displayed scrolling across the Command window (here shown at each snapshot in time). >tickerText( Sic transit gloria mundi!', 8, 0.1) Si Sic Sic Sic t Sic tr Sic tra Sic tran ic trans c transi transit transit ransit g ansit gl nsit glo sit glor it glori www.it-ebooks.info Programming Problems 133 t gloria gloria gloria nm loria mu oria mun ria mund ia mundi mundi! mundi! mundi! undi! ndi! di!

Explanation / Answer

classdef simpleStockTicker < handle
% simpleStockTicker A simple stock ticker app written with a MATLAB class
%
% This app provides an example of how to use a MATLAB class to write a
% simple stock ticker which updates a plot of stock prices over time for a
% given ticker symbol.

  
properties
Figure % Graphics handles
Axis
Line
TickerText
TickerEdit
  
Timer % Timer object to get updated prices
TimerUpdateRate = 1 % In seconds
NumValues = 30 % Number of values shown in the plot
TickerSymbol = 'GOOG' % Current ticker symbol (initial value = 'GOOG')
end
  
methods
  
function app = simpleStockTicker
% This is the "constructor" for the class
% It runs when an object of this class is created
app.Figure = figure('MenuBar','none',... % Main figure
'NumberTitle','off','Name','Simple Stock Ticker',...
'CloseRequestFcn',@app.closeApp) ;
app.Axis = axes('Parent',app.Figure,... % Axis for prices
'Position',[.13 .15 .78 .75]);
app.TickerText = uicontrol(app.Figure,... % 'Symbol' label
'Style','text','Position',[20 20 50 20],...
'String','Symbol:');
app.TickerEdit = uicontrol(app.Figure,... % Symbol edit box
'Style','edit','Position',[75 20 50 20 ],...
'String',app.TickerSymbol,...
'Callback', @app.symbolUpdateCallback);
  
prices = NaN*ones(1,app.NumValues) ; % Initialize prices
app.Line = plot(app.Axis,prices,'Marker',...
'.','LineStyle','-');
ylabel(app.Axis,'Stock value ($)') ;
set(app.Axis,'XTickLabel','') ;
title(app.Axis,['Stock Price: ' app.TickerSymbol])
  
app.Timer = timer; % Create timer
app.Timer.ExecutionMode = 'fixedRate' ;
app.Timer.Period = app.TimerUpdateRate ;
app.Timer.TimerFcn = @app.valueUpdateCallback ;
start(app.Timer) ;
end

function closeApp(app,hObject,eventdata)
% This function runs when the app is closed
try
stop(app.Timer)
delete(app.Timer)
end
delete(app.Figure)
end
  
function symbolUpdateCallback(app,hObject,eventdata)
% This function runs when ticker changes in edit box
set(app.Line,'YData',NaN*ones(1,app.NumValues));
app.TickerSymbol = get(app.TickerEdit,'String');
[price,name] = getQuote(app) ;
if price == 0
warndlg(['Ticker symbol ' app.TickerSymbol ' not found'])
end
  
title(app.Axis,['Stock Price: ' name])
valueUpdateCallback(app)
end
  
function valueUpdateCallback(app,hObject,eventdata)
% This function runs when the timer updates
StockSymbol = app.TickerSymbol;
try
price = getQuote(app) ;
catch
errordlg(['Could not retrieve price for ' StockSymbol])
end
yvalues = get(app.Line,'YData'); % Update the plot
yvalues = [yvalues(2:end) price];
set(app.Line,'YData',yvalues)
end
  
function [value,name] = getQuote(app)
% getQuote(app) Get stock quote using simple Yahoo finance API.
% See http://www.gummy-stuff.org/Yahoo-data.htm for details
url = sprintf('http://finance.yahoo.com/d/quotes.csv?s=%s&f=nl1',...
app.TickerSymbol);
s = urlread(url);
[name,remain] = strtok(s,'"');
value = str2num(strtok(remain,'",'));
end
  
end
end % End of class definition

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