error bar on group plot :X-data must be the same size as Y-data.

% Set up the problem by recreating the table.
A = [	0	0	1	1	2	2	3	3]';
B = ['0'	'1'	'0'	'1'	'0'	'1'	'0'	'1']';
C = [2	11	32	33	38	31	47	39]';
D = [0.5	0.7	9.5	3.3	3.8	3.1	4.7	3.9]';
T = table(A,B,C,D);
% use sortrows to organize data in an expected format
T = sortrows(T,["B","A"]);
% extract x values, group names
x = unique(T.A);
b = unique(T.B);
% Reshape the data based on the number of unique values in A
CC = reshape(T.C,length(x),[])
DD = reshape(T.D,length(x),[])
% plot
hold on
bar(x,CC)
errorbar(x,CC,DD)
legend(b)
hold off

Error using errorbar (line 105)
X-data must be the same size as Y-data.
 

Answer 1

[Alan Stevens]

Something like this?

% Set up the problem by recreating the table.
A = [	0	0	1	1	2	2	3	3]';
B = ['0'	'1'	'0'	'1'	'0'	'1'	'0'	'1']';
C = [2	11	32	33	38	31	47	39]';
D = [0.5	0.7	9.5	3.3	3.8	3.1	4.7	3.9]';
T = table(A,B,C,D);
% use sortrows to organize data in an expected format
T = sortrows(T,["B","A"]);
% extract x values, group names
x = unique(T.A);
b = unique(T.B);
% Reshape the data based on the number of unique values in A
CC = reshape(T.C,length(x),[]);
DD = reshape(T.D,length(x),[]);
% plot
hold on
bar(x,CC)
errorbar(x-0.15,CC(:,1),DD(:,1),'o')
errorbar(x+0.15,CC(:,2),DD(:,2),'o')
legend(b)
hold off

[Frederick Awuah-Gyasi]

yes this works. only issue now is x-1.5 is giving errors because in the orignal data x is a string: names. any suggestion on how to shift that.

[Frederick Awuah-Gyasi]

and how do I custom color instead of the default.

[Alan Stevens]

1. Custom color is straightforward - see below.
2. You don't say what the string names are. If they are just string representations of numbers, then use str2num.

% Set up the problem by recreating the table.
A = [	'0'	'0'	'1'	'1'	'2'	'2'	'3'	'3']'; %%%%%%%%%%%%%%%
B = ['0'	'1'	'0'	'1'	'0'	'1'	'0'	'1']';
C = [2	11	32	33	38	31	47	39]';
D = [0.5	0.7	9.5	3.3	3.8	3.1	4.7	3.9]';
T = table(A,B,C,D);
% use sortrows to organize data in an expected format
T = sortrows(T,["B","A"]);
% extract x values, group names
x = str2num(unique(T.A));    %%%%%%%%%%%%%%%%%
b = unique(T.B);
% Reshape the data based on the number of unique values in A
CC = reshape(T.C,length(x),[]);
DD = reshape(T.D,length(x),[]);
% plot
hold on
bar(x,CC)
errorbar(x-0.15,CC(:,1),DD(:,1),'o','Color','k') %%%%%%%%%%%%%%
errorbar(x+0.15,CC(:,2),DD(:,2),'o','Color','k') %%%%%%%%%%%%%%
legend(b)
hold off

[Frederick Awuah-Gyasi]

the names of had A01,A02 etc so I created a namenumber from that and it worked. . The custom color I asked was mainly for the bars actually. Thanks so much.

[Frederick Awuah-Gyasi]

fixed now

[Frederick Awuah-Gyasi]

How do I add text labels over the bars.

% Set up the problem by recreating the table.
A = [	'0'	'0'	'1'	'1'	'2'	'2'	'3'	'3']'; %%%%%%%%%%%%%%%
B = ['0'	'1'	'0'	'1'	'0'	'1'	'0'	'1']';
C = [2	11	32	33	38	31	47	39]';
D = [0.5	0.7	9.5	3.3	3.8	3.1	4.7	3.9]';
E = ["Q1" "Q2" "Q1" "Q4" "Q1" "Q1" "Q2" "Q1"]';
T = table(A,B,C,D,E);
% use sortrows to organize data in an expected format
T = sortrows(T,["B","A"]);
% extract x values, group names
x = str2num(unique(T.A));    %%%%%%%%%%%%%%%%%
b = unique(T.B);
% Reshape the data based on the number of unique values in A
CC = reshape(T.C,length(x),[]);
DD = reshape(T.D,length(x),[]);
EE = reshape(T.E,length(x),[]);

% plot
hold on
hb = bar(x,CC)
errorbar(x-0.15,CC(:,1),DD(:,1),'o','Color','k') %%%%%%%%%%%%%%
errorbar(x+0.15,CC(:,2),DD(:,2),'o','Color','k') %%%%%%%%%%%%%%
% legend(b)

% xtips2 = ba(2).XEndPoints;
% ytips2 = ba(2).YEndPoints;
% labels2 = string(EE(2).YData);
% 
% text(xtips2,ytips2,labels2,'HorizontalAlignment','center',...
%     'VerticalAlignment','bottom')


barWidth = hb.BarWidth;
numCol = size(CC,1);
cnt = 0;
for ii = numbersToAdd'
    cnt = cnt + 1;
    xPos = linspace(cnt - barWidth/2, cnt + barWidth / 2, numCol+1);
    idx = 1;
    for jj = xPos(1:end-1)
        val = EE(cnt,idx);
        y = M(cnt,idx);
        text(jj, y + 1, num2str(val));
        idx = idx +1;
    end     
end
hold off

[Alan Stevens]

Do you mean something like this?

% Set up the problem by recreating the table.
A = [	'0'	'0'	'1'	'1'	'2'	'2'	'3'	'3']'; %%%%%%%%%%%%%%%
B = ['0'	'1'	'0'	'1'	'0'	'1'	'0'	'1']';
C = [2	11	32	33	38	31	47	39]';
D = [0.5	0.7	9.5	3.3	3.8	3.1	4.7	3.9]';
E = ["Q1" "Q2" "Q1" "Q4" "Q1" "Q1" "Q2" "Q1"]';
T = table(A,B,C,D,E);
% use sortrows to organize data in an expected format
T = sortrows(T,["B","A"]);
% extract x values, group names
x = str2num(unique(T.A));    %%%%%%%%%%%%%%%%%
b = unique(T.B);
% Reshape the data based on the number of unique values in A
CC = reshape(T.C,length(x),[]);
DD = reshape(T.D,length(x),[]);
EE = reshape(T.E,length(x),[]);

% plot
hold on
hb = bar(x,CC);
errorbar(x-0.15,CC(:,1),DD(:,1),'o','Color','k'); %%%%%%%%%%%%%%
errorbar(x+0.15,CC(:,2),DD(:,2),'o','Color','k'); %%%%%%%%%%%%%%

text(x-0.2,CC(:,1)+DD(:,1)+5,EE(:,1))
text(x+0.1,CC(:,2)+DD(:,2)+5,EE(:,2))
hold off