MATLAB Visualise Sent Email - 24 Hour Clock

sent_mail_vis.m

clear all
close all
clc

% dump from zimbra and run
% grep -r "^Date: " ./Sent* > Sent.list

regs = ...
    ['(?<day_named>(Mon|Tue|Wed|Thu|Fri|Sat|Sun))' ',\s' ...
     '(?<day>[0-9][0-9]*)' '\s' ...
     '(?<month>(Jan|Feb|Mar|Apr|Jun|Jul|Aug|Sep|Oct|Nov|Dec))' '\s' ...
     '(?<year>[0-9][0-9][0-9][0-9])' '\s' ...
     '(?<hours>[0-9][0-9])' '[:]' ...
     '(?<minutes>[0-9][0-9])' '[:]' ...
       ];

sent = [];
fid = fopen('Sent.list', 'r');
l = '';
while true
    l = [fgetl(fid)];
    if ~ischar(l), break, end
    sent = [ sent ; regexp(l, regs, 'names') ];
end
fclose(fid);

counts = hist(str2num(char(sent.hours)), 24);
figure, hold on, axis square off
for n=0:0.001:2*pi
    h = floor((n/(2*pi))*24)+1;
    shade = counts(h)/max(counts);
    plot([0 sin(n)], [0 cos(n)], '-', 'LineWidth', 2, ...
         'Color', [shade 1-shade 1-shade])
end
hour = 0;
for n=linspace(0,23,24)/24*2*pi
    text(sin(n+0.15)*1.1, cos(n+0.15)*1.1, num2str(hour))
    plot([0 sin(n)*1.1], [0 cos(n)*1.1], 'k-')
    hour = hour + 1;
end