**Latest result:**Plot created**Created on:**23 Jan 2012**Liked:**3 times

Also calculate the rate at which it's growing.

% Files on the File Exchange % time vector is: time1151 % data vector is: data1151 data1151 = data1151(:); % Pick N days worth of data N = 90; t0 = now - N; % Goal in thousands goal = 25; pick = time1151 > t0; t = time1151(pick); d = data1151(pick)/1000; plot(t,d,'b') [p,S,mu] = polyfit(t,d,1); % p1 is the equation for the linear fit to the data p1 = [p(1)/mu(2) p(2)-p(1)*mu(1)/mu(2)]; % p2 is the equation for the target amount p2 = [0 goal]; % ti = t_intersect, di = d_intersect ti = (p2(2) - p1(2))/(p1(1)-p2(1)); di = p1(1)*ti + p1(2); tf = [t0 ti+1]; df = polyval(p1,tf); line(tf,df,'Color','red','LineStyle',':') line([t0 ti+1],goal*[1 1],'Color','black') line(ti,di,'Marker','o','Color','red') set(gca,'FontSize',16) datetick title(sprintf('The File Exchange is growing by %4.1f files/day', 1000*p1(1))) xlabel(sprintf('%d,000 files on %s',goal,datestr(ti))) ylabel('Number of Files (1000s)')

data points

Created 18 Oct 2011 by Ned Gulley (1 Like)

169 views (30 days)

This trend is associated in this plot (though may not be used.)

## 0 comments