how to plot two graphs ?

Question

Rita 2016-3-8

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评论： Star Strider 2016-3-9

I have two matrices to plot

A=[1  1.2   
2.3
3.2
 3 ]

and

B=[2  3.2
4.5
7
0 ]

I want to create a plot

plot(A(:,1),A(:,2),'r');
hold on
plot(B(:,1),B(:,2),'b');

but instead of x it should be month. Any suggestion would be appreciated in advance.

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Answer 1

Star Strider 2016-3-8

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编辑：Star Strider 2016-3-8

在 MATLAB Online 中打开

One approach that will use local month names:

A=[1  1.2   
   3  2.3
   7  3.2
   8   3 ]
B=[2  3.2
   4  4.5
   5  7
   6  0 ]
dn = datenum([repmat(2016, size(A,1)+size(B,1), 1)  [A(:,1); B(:,1)], ones(size(A,1)+size(B,1), 1)]);   % Create Date Numbers From Months
plot(dn(1:size(A,1)) ,A(:,2),'r');
hold on
plot(dn(size(A,1)+1:end),B(:,2),'b');
datetick('x', 'mmm')

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Star Strider 2016-3-9

在 MATLAB Online 中打开

My pleasure.

I’m not quite certain what you want, so I did two plots:

D = load('Rita test.mat');
A = D.A;
B = D.B;
% ‘The start date is 2001/1/1 and end date is last day of 2006 (2006/12/31) continuously.’
dn = datenum([2001 01 01]) + [0:(size(A,1)+size(B,1))-1];   % Recalculate ‘dn’
DateA = A(:,1);                                             % First Column Are Indices Into ‘dn’
DateB = B(:,1);
figure(1)                                                   % Plot ‘A’ & ‘B’ As Separate Series
plot(dn(DateA), A(:,2), '-')
hold on
plot(dn(DateB), B(:,2), '-')
hold off
grid
set(gca, 'XTickLabelRotation',30, 'FontSize',8)
datetick('x', 'mmm yy')
AcatBsorted = sortrows([A; B], 1);                          % Concatenate & Sort ‘A’ & ‘B’
figure(2)                                                   % Plot ‘A’ & ‘B’ Together
plot(dn(AcatBsorted(:,1)), AcatBsorted(:,2))
grid
set(gca, 'XTickLabelRotation',30, 'FontSize',8)
datetick('x', 'mmm yy')

I don’t know what date resolution you want. I cannot get datetick to plot more ticks even when I tell it to. That works without using datetick, but datetick refuses to plot mid-year dates as well. We can do this with a text call if you want to. If the datetick defaults work for you, I’ll not pursue this further.

Rita 2016-3-9

Thank you so much.It is exactly what I need.I really appreciate your great help.

Star Strider 2016-3-9

As always, my pleasure!

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Answer 2

Chad Greene 2016-3-8

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Is this what you want?

set(gca,'xtick',1:8,'xticklabel',{'jan','feb','mar','apr','may','jun','jul','aug'})

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how to plot two graphs ?

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