在日常matlab计算时候，考虑到计算漫长的等待，要是提前知道计算时长那该多好
测试代码
m=4;
n=3;
p=100;
progressbar('1','2','3')
for i=1:m
for j=1:n
for k=1:p
pause(0.01)
face3=k/p;
face2=((j-1)+face3)/n;
face1=((i-1)+face2)/m;
progressbar(face1,face2,face3)
end
end
end
progressbar进度条函数
function progressbar(varargin)
% Description:
% progressbar() provides an indication of the progress of some task using
% graphics and text. Calling progressbar repeatedly will update the figure and
% automatically estimate the amount of time remaining.
% This implementation of progressbar is intended to be extremely simple to use
% while providing a high quality user experience.
%
% Features:
% - Can add progressbar to existing m-files with a single line of code.
% - Supports multiple bars in one figure to show progress of nested loops.
% - Optional labels on bars.
% - Figure closes automatically when task is complete.
% - Only one figure can exist so old figures don't clutter the desktop.
% - Remaining time estimate is accurate even if the figure gets closed.
% - Minimal execution time. Won't slow down code.
% - Randomized color. When a programmer gets bored...
%
% Example Function Calls For Single Bar Usage:
% progressbar % Initialize/reset
% progressbar(0) % Initialize/reset
% progressbar('Label') % Initialize/reset and label the bar
% progressbar(0.5) % Update
% progressbar(1) % Close
%
% Example Function Calls For Multi Bar Usage:
% progressbar(0, 0) % Initialize/reset two bars
% progressbar('A', '') % Initialize/reset two bars with one label
% progressbar('', 'B') % Initialize/reset two bars with one label
% progressbar('A', 'B') % Initialize/reset two bars with two labels
% progressbar(0.3) % Update 1st bar
% progressbar(0.3, []) % Update 1st bar
% progressbar([], 0.3) % Update 2nd bar
% progressbar(0.7, 0.9) % Update both bars
% progressbar(1) % Close
% progressbar(1, []) % Close
% progressbar(1, 0.4) % Close
%
% Notes:
% For best results, call progressbar with all zero (or all string) inputs
% before any processing. This sets the proper starting time reference to
% calculate time remaining.
% Bar color is choosen randomly when the figure is created or reset. Clicking
% the bar will cause a random color change.
%
% Demos:
% % Single bar
% m = 500;
% progressbar % Init single bar
% for i = 1:m
% pause(0.01) % Do something important
% progressbar(i/m) % Update progress bar
% end
%
% % Simple multi bar (update one bar at a time)
% m = 4;
% n = 3;
% p = 100;
% progressbar(0,0,0) % Init 3 bars
% for i = 1:m
% progressbar([],0) % Reset 2nd bar
% for j = 1:n
% progressbar([],[],0) % Reset 3rd bar
% for k = 1:p
% pause(0.01) % Do something important
% progressbar([],[],k/p) % Update 3rd bar
% end
% progressbar([],j/n) % Update 2nd bar
% end
% progressbar(i/m) % Update 1st bar
% end
%
% % Fancy multi bar (use labels and update all bars at once)
% m = 4;
% n = 3;
% p = 100;
% progressbar('Monte Carlo Trials','Simulation','Component') % Init 3 bars
% for i = 1:m
% for j = 1:n
% for k = 1:p
% pause(0.01) % Do something important
% % Update all bars
% frac3 = k/p;
% frac2 = ((j-1) + frac3) / n;
% frac1 = ((i-1) + frac2) / m;
% progressbar(frac1, frac2, frac3)
% end
% end
% end
%
% Author:
% Steve Hoelzer
%
% Revisions:
% 2002-Feb-27 Created function
% 2002-Mar-19 Updated title text order
% 2002-Apr-11 Use floor instead of round for percentdone
% 2002-Jun-06 Updated for speed using patch (Thanks to waitbar.m)
% 2002-Jun-19 Choose random patch color when a new figure is created
% 2002-Jun-24 Click on bar or axes to choose new random color
% 2002-Jun-27 Calc time left, reset progress bar when fractiondone == 0
% 2002-Jun-28 Remove extraText var, add position var
% 2002-Jul-18 fractiondone input is optional
% 2002-Jul-19 Allow position to specify screen coordinates
% 2002-Jul-22 Clear vars used in color change callback routine
% 2002-Jul-29 Position input is always specified in pixels
% 2002-Sep-09 Change order of title bar text
% 2003-Jun-13 Change 'min' to 'm' because of built in function 'min'
% 2003-Sep-08 Use callback for changing color instead of string
% 2003-Sep-10 Use persistent vars for speed, modify titlebarstr
% 2003-Sep-25 Correct titlebarstr for 0% case
% 2003-Nov-25 Clear all persistent vars when percentdone = 100
% 2004-Jan-22 Cleaner reset process, don't create figure if percentdone = 100
% 2004-Jan-27 Handle incorrect position input
% 2004-Feb-16 Minimum time interval between updates
% 2004-Apr-01 Cleaner process of enforcing minimum time interval
% 2004-Oct-08 Seperate function for timeleftstr, expand to include days
% 2004-Oct-20 Efficient if-else structure for sec2timestr
% 2006-Sep-11 Width is a multiple of height (don't stretch on widescreens)
% 2010-Sep-21 Major overhaul to support multiple bars and add labels
%
persistent progfig progdata lastupdate
% Get inputs
if nargin > 0
input = varargin;
ninput = nargin;
else
% If no inputs, init with a single bar
input = {0};
ninput = 1;
end
% If task completed, close figure and clear vars, then exit
if input{1} == 1
if ishandle(progfig)
delete(progfig) % Close progress bar
end
clear progfig progdata lastupdate % Clear persistent vars
drawnow
return
end
% Init reset flag
resetflag = false;
% Set reset flag if first input is a string
if ischar(input{1})
resetflag = true;
end
% Set reset flag if all inputs are zero
if input{1} == 0
% If the quick check above passes, need to check all inputs
if all([input{:}] == 0) && (length([input{:}]) == ninput)
resetflag = true;
end
end
% Set reset flag if more inputs than bars
if ninput > length(progdata)
resetflag = true;
end
% If reset needed, close figure and forget old data
if resetflag
if ishandle(progfig)
delete(progfig) % Close progress bar
end
progfig = [];
progdata = []; % Forget obsolete data
end
% Create new progress bar if needed
if ishandle(progfig)
else % This strange if-else works when progfig is empty (~ishandle() does not)
% Define figure size and axes padding for the single bar case
height = 0.03;
width = height * 8;
hpad = 0.02;
vpad = 0.25;
% Figure out how many bars to draw
nbars = max(ninput, length(progdata));
% Adjust figure size and axes padding for number of bars
heightfactor = (1 - vpad) * nbars + vpad;
height = height * heightfactor;
vpad = vpad / heightfactor;
% Initialize progress bar figure
left = (1 - width) / 2;
bottom = (1 - height) / 2;
progfig = figure(...
'Units', 'normalized',...
'Position', [left bottom width height],...
'NumberTitle', 'off',...
'Resize', 'off',...
'MenuBar', 'none' );
% Initialize axes, patch, and text for each bar
left = hpad;
width = 1 - 2*hpad;
vpadtotal = vpad * (nbars + 1);
height = (1 - vpadtotal) / nbars;
for ndx = 1:nbars
% Create axes, patch, and text
bottom = vpad + (vpad + height) * (nbars - ndx);
progdata(ndx).progaxes = axes( ...
'Position', [left bottom width height], ...
'XLim', [0 1], ...
'YLim', [0 1], ...
'Box', 'on', ...
'ytick', [], ...
'xtick', [] );
progdata(ndx).progpatch = patch( ...
'XData', [0 0 0 0], ...
'YData', [0 0 1 1] );
progdata(ndx).progtext = text(0.99, 0.5, '', ...
'HorizontalAlignment', 'Right', ...
'FontUnits', 'Normalized', ...
'FontSize', 0.7 );
progdata(ndx).proglabel = text(0.01, 0.5, '', ...
'HorizontalAlignment', 'Left', ...
'FontUnits', 'Normalized', ...
'FontSize', 0.7 );
if ischar(input{ndx})
set(progdata(ndx).proglabel, 'String', input{ndx})
input{ndx} = 0;
end
% Set callbacks to change color on mouse click
set(progdata(ndx).progaxes, 'ButtonDownFcn', {@changecolor, progdata(ndx).progpatch})
set(progdata(ndx).progpatch, 'ButtonDownFcn', {@changecolor, progdata(ndx).progpatch})
set(progdata(ndx).progtext, 'ButtonDownFcn', {@changecolor, progdata(ndx).progpatch})
set(progdata(ndx).proglabel, 'ButtonDownFcn', {@changecolor, progdata(ndx).progpatch})
% Pick a random color for this patch
changecolor([], [], progdata(ndx).progpatch)
% Set starting time reference
if ~isfield(progdata(ndx), 'starttime') || isempty(progdata(ndx).starttime)
progdata(ndx).starttime = clock;
end
end
% Set time of last update to ensure a redraw
lastupdate = clock - 1;
end
% Process inputs and update state of progdata
for ndx = 1:ninput
if ~isempty(input{ndx})
progdata(ndx).fractiondone = input{ndx};
progdata(ndx).clock = clock;
end
end
% Enforce a minimum time interval between graphics updates
myclock = clock;
if abs(myclock(6) - lastupdate(6)) < 0.01 % Could use etime() but this is faster
return
end
% Update progress patch
for ndx = 1:length(progdata)
set(progdata(ndx).progpatch, 'XData', ...
[0, progdata(ndx).fractiondone, progdata(ndx).fractiondone, 0])
end
% Update progress text if there is more than one bar
if length(progdata) > 1
for ndx = 1:length(progdata)
set(progdata(ndx).progtext, 'String', ...
sprintf('%1d%%', floor(100*progdata(ndx).fractiondone)))
end
end
% Update progress figure title bar
if progdata(1).fractiondone > 0
runtime = etime(progdata(1).clock, progdata(1).starttime);
timeleft = runtime / progdata(1).fractiondone - runtime;
timeleftstr = sec2timestr(timeleft);
titlebarstr = sprintf('%2d%% %s remaining', ...
floor(100*progdata(1).fractiondone), timeleftstr);
else
titlebarstr = ' 0%';
end
set(progfig, 'Name', titlebarstr)
% Force redraw to show changes
drawnow
% Record time of this update
lastupdate = clock;
% ------------------------------------------------------------------------------
function changecolor(h, e, progpatch) %#ok<INUSL>
% Change the color of the progress bar patch
% Prevent color from being too dark or too light
colormin = 1.5;
colormax = 2.8;
thiscolor = rand(1, 3);
while (sum(thiscolor) < colormin) || (sum(thiscolor) > colormax)
thiscolor = rand(1, 3);
end
set(progpatch, 'FaceColor', thiscolor)
% ------------------------------------------------------------------------------
function timestr = sec2timestr(sec)
% Convert a time measurement from seconds into a human readable string.
% Convert seconds to other units
w = floor(sec/604800); % Weeks
sec = sec - w*604800;
d = floor(sec/86400); % Days
sec = sec - d*86400;
h = floor(sec/3600); % Hours
sec = sec - h*3600;
m = floor(sec/60); % Minutes
sec = sec - m*60;
s = floor(sec); % Seconds
% Create time string
if w > 0
if w > 9
timestr = sprintf('剩余：%d 周', w);
else
timestr = sprintf('剩余：%d 周, %d 天', w, d);
end
elseif d > 0
if d > 9
timestr = sprintf('剩余：%d 天', d);
else
timestr = sprintf('剩余：%d 天, %d 小时', d, h);
end
elseif h > 0
if h > 9
timestr = sprintf('剩余：%d 小时', h);
else
timestr = sprintf('剩余：%d 小时, %d 分钟', h, m);
end
elseif m > 0
if m > 9
timestr = sprintf('剩余：%d 分', m);
else
timestr = sprintf('剩余：%d 分钟, %d 秒', m, s);
end
else
timestr = sprintf('剩余：%d 秒', s);
end
运行结果：
