Bar plot problem with legend

If I have

    A1 =

      1.0e-013 *

      Columns 1 through 8

        0.1481    0.1574    0.1465    0.1481    0.1574    0.1465    0.1481    0.1574

      Column 9

        0.1465

And

A2 =

    1.0e-013 *

    Columns 1 through 8

      0.1250    0.1523    0.1465    0.1250    0.1523    0.1465    0.1250    0.1523

    Column 9

      0.1465

How can I plot either variables, on the same bar plot?

bar([A1 A2])
legend('A1,'A2')

If MATLAB said:

Warning: Ignoring extra legend entries. 
> In legend at 278

What's the mistake?

Answer 1

[Azzi Abdelmalek]

A1 =1.0e-013 *[ 0.1481    0.1574    0.1465    0.1481    0.1574    0.1465    0.1481    0.1574]
A2= 1.0e-013 *[0.1250    0.1523    0.1465    0.1250    0.1523    0.1465    0.1250    0.1523]
bar([A1' A2'])
legend('A1','A2')

[Francesco]

If there are so many elements in A1 and A2 and, a priori, I don't Know how many elements, how can I do it?

[Azzi Abdelmalek]

What do you mean by so many element? give an example

[Francesco]

The A1 and A2 variables are define before in the code. In this case A1 is 1x9 double and also A2. But it may be 1xn double for A1 and A2. If A1=A2=1xn, I can't do as you said because I have not entire into the code.

[Azzi Abdelmalek]

(I have not entire into the code): This sentence is not clear for me

[Francesco]

But If I have A1 and A2 variables, for example, A1=A2=1*n how I can do the bar plot?

[Azzi Abdelmalek]

The same as the above answer

bar([A1' A2'])
legend('A1','A2')