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From: Tom Lane on 13 Apr 2010 13:37
> p1=boxplot(bxplt_data2,'orientation','horizontal','label',bxplt_lbl,'colors','b','symbol','b+');
> hold on
> p2=boxplot(bxplt_data1,'orientation','horizontal','label',bxplt_lbl,'colors','r','symbol','r+');
> legend([p1,p2],M);
> *****************
> Error:
> ??? Operands to the || and && operators must be convertible to logical
> scalar values.

One issue is that the two boxplot commands each return a matrix of handles
to different parts of the boxes. The legend function isn't expecting you to
pass in a matrix of handles.

You might find it easier to approach this way:

M={'Test A','Test B'};
X1 = randn(30,3);
X2 = 10+randn(30,3);
pos = [(1:size(X1,2)), (1:size(X2,2))];
p1=boxplot([X1 X2],'orientation','horizontal','label',{'#1' '#2' '#3' '' ''
''},...
'symbol','+','pos',pos,'color','rb');
legend(p1(1,[1 2]),M);

-- Tom


From: Anbazhagan on 15 Apr 2010 05:44
This appraoch doesnt work either. I get two errors.
First I get an error message saying that 'Incorrect Number of labels'.
My labels have only thirty values. Matlab needs sixty values to plot. So instead of one '#1' label there are two '#1' labels.
I want the two boxplots to share the same labels which is not possible with this approach i guess.



"Tom Lane" <tlane(a)mathworks.com> wrote in message <hq2a4r$4vj$1(a)fred.mathworks.com>...
> > p1=boxplot(bxplt_data2,'orientation','horizontal','label',bxplt_lbl,'colors','b','symbol','b+');
> > hold on
> > p2=boxplot(bxplt_data1,'orientation','horizontal','label',bxplt_lbl,'colors','r','symbol','r+');
> > legend([p1,p2],M);
> > *****************
> > Error:
> > ??? Operands to the || and && operators must be convertible to logical
> > scalar values.
>
> One issue is that the two boxplot commands each return a matrix of handles
> to different parts of the boxes. The legend function isn't expecting you to
> pass in a matrix of handles.
>
> You might find it easier to approach this way:
>
> M={'Test A','Test B'};
> X1 = randn(30,3);
> X2 = 10+randn(30,3);
> pos = [(1:size(X1,2)), (1:size(X2,2))];
> p1=boxplot([X1 X2],'orientation','horizontal','label',{'#1' '#2' '#3' '' ''
> ''},...
> 'symbol','+','pos',pos,'color','rb');
> legend(p1(1,[1 2]),M);
>
> -- Tom
>
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