octave - using timer in MATLAB to extract the system time -

!i using matlab design analog clock. currently, code displays (or plots rather) clock design hands (hours, mins, secs) , not tick. here code:

function raviclock(h,m,s) drawclockface;   %timer begins------- t = timer; t.executionmode = 'fixedspacing';  %use 1 of repeating modes t.period = 1;                      %fire on 1 second intervals t.timerfcn = @timer_setup;           %when fired, call function start(t); set(gcf,'deletefcn',@(~,~)stop(t)); end  function timer_setup(varargin)  format shortg; timenow = clock; h = timenow(4); m = timenow(5); s = timenow(6);  % hour hand hours= h + m/60 + s/3600; hourangle= 90 - hours*(360/12);  % compute coordinates pointing end of hour hand , draw [xhour, yhour]= polar2xy(0.6, hourangle); plot([0 xhour], [0 yhour], 'k-','linewidth',7.4)  % minute hand mins= m + s/60; minsangle= 90 - mins*(360/60);  % compute coordinates pointing end of minute hand , draw [xmins, ymins]= polar2xy(0.75, minsangle); plot([0 xmins], [0 ymins], 'r-','linewidth',4)   %second's hand second = s; secangle = 90- second*(360/60);  [xsec, ysec]= polar2xy(0.85, secangle); plot([0 xsec], [0 ysec], 'm:','linewidth',2) %end   % while ends end  %--------------------------------------------------------  function drawclockface  %close           axis([-1.2 1.2 -1.2 1.2])   axis square equal hold on               theta= 0; k= 0:59     [xx,yy]= polar2xy(1.05,theta);         plot(xx,yy,'k*')          [x,y]= polar2xy(0.9,theta);     if ( mod(k,5)==0 )  % hour mark         plot(x,y,'<')     else                % minute mark         plot(x,y,'r*')     end     theta= theta + 360/60;     end end  %----------------------------------------------------------------- function [x, y] = polar2xy(r,theta)  rads= theta*pi/180;   x= r*cos(rads); y= r*sin(rads); end 

this taking static data of values hour, minute , second arguments when call function. tried using following in while loop didn't much

format shortg c=clock clockdata = fix(c) h = clockdata(4) m = clockdata(5) s = clockdata(6) 

and passing h, m , s respective cuntions. want know how can use timer obkjects , callbacks extracting information of [hrs mins secs] can compute respective point co-ordinates in real time clock ticks.

i'd couple of things here.

first, don't need pass h, m, s inputs, if displaying current time. add top of function auto set these variables.

if nargin == 0     [~,~,~,h,m,s] = datevec(now); end 

then, pretty easy use time call function periodically. this.

t = timer; t.executionmode = 'fixedspacing';  %use 1 of repeating modes t.period = 1;                      %fire on 1 second intervals t.timerfcn = @(~,~)raviclock;      %when fired, call function (ignoring 2 inputs) start(t);                          %go! 

use docsearch timer in depth documentation of timer objects. code above should started.

to stop timer, run

stop(t); 

to stop timer when window closed, put stop command window deletion callback:

set(gcf,'deletefcn',@(~,~)stop(t));  %note:  better explicitly use figure number, rather gcf.