How do I plot Gantt Chart for scheduling?

Hello everyone,

I have following matrix including task start and finish time for scheduling.

task	start	    finish
1	    0	        410
2	    410	        600
3	    600	        803
4	    803	        1425
5	    600	        950
6	    0	        653
7	    653	        1970
8	    1970	    3050
9	    3050	    3406
10	    3406	    3778
11	    3778	    4192
12	    4192	    4693
13	    4693	    5353
14	    3050	    4572
15	    5353	    5452
16	    5452	    7648

How can I plot start and finish time for each task?

Answer 1

[Adam Danz]

There are several Gantt Chart functions on the File Exchange.

You could create your own Gantt chart by building on this quick demo below.

Demo: Matrix version

data = [% task, start, finish
1	    0	        410
2	    410	        600
3	    600	        803
4	    803	        1425
5	    600	        950
6	    0	        653
7	    653	        1970
8	    1970	    3050
9	    3050	    3406
10	    3406	    3778
11	    3778	    4192
12	    4192	    4693
13	    4693	    5353
14	    3050	    4572
15	    5353	    5452
16	    5452	    7648];

width = .75; % vertical width of horizontal bars
ypairs = data(:,1) + width./[-2,2];
y = repelem(ypairs,1,2);
x = data(:,[2,3,3,2]);
patch(x',y','b')
grid on
set(gca,'YDir','Reverse')

Demo: Table version

T = array2table([
1	    0	        410
2	    410	        600
3	    600	        803
4	    803	        1425
5	    600	        950
6	    0	        653
7	    653	        1970
8	    1970	    3050
9	    3050	    3406
10	    3406	    3778
11	    3778	    4192
12	    4192	    4693
13	    4693	    5353
14	    3050	    4572
15	    5353	    5452
16	    5452	    7648], ...
'VariableNames', {'Task','Start','Finish'});

width = .75; % vertical width of horizontal bars
ypairs = T.Task + width./[-2,2];
y = repelem(ypairs,1,2);
x = [T.Start, T.Finish, T.Finish, T.Start];
patch(x',y','b')
grid on
set(gca,'YDir','Reverse')

[Abdullah Türk]

Thank you Adam.

But the code did not work. Following error:

Matrix dimensions must agree.

Error in obj_test (line 94)
ypairs = data(:,1) + width./[-2,2];

I used this matrix for data:

data = [% task, start, finish
10	    0	    410
1	    410	    600
2	    600	    803
3	    803	    1425
11	    600	    950
12	    0	    653
15	    653	    1970
13	    1970	3050
4	    3050	3406
5	    3406	3778
6	    3778	4192
7	    4192	4693
8	    4693	5353
14	    3050	4572
9	    5353	5452
16	    5452	7648];

width = .75; % vertical width of horizontal bars
ypairs = data(:,1) + width./[-2,2];
y = repelem(ypairs,1,2);
x = data(:,[2,3,3,2]);
patch(x',y','b')
grid on
set(gca,'YDir','Reverse')

But it did not work.

[Adam Danz]

I see that you are using MATLAB R2015a (thanks for filling in your release info). My solution uses implicit expansion which became available in MATLAB R2016b.

Replace that line with

ypairs = bsxfun(@plus,data(:,1), width./[-2,2])

[Abdullah Türk]

Yes, I'm using MATLAB R2015a.

Now, it works.

Thank you very much Adam :)

[Abdullah Türk]

Hi again Adam,

I want to ask a last question about plotting. Can we just show task numbers without 0 and 18 on the x-axis?

Thank you.

[Adam Danz]

set(gca,'YTick',sort(data(:,1)))

[Abdullah Türk]

Thanks Adam :)

[Alfonso Rodriguez]

Amazing code for a project managment class for engineers who are adapting to Matlab.

[Adam Danz]

Thanks for the feedback @Alfonso Rodriguez

Answer 2

[Muhammad Raza]

Here in this article, enough details available about how to plot gantt chart using MATLAB, take a look.

https://www.mathworks.com/matlabcentral/fileexchange/135827-gantt-chart-matlab-code