how can i align two arrays according to their clock

i have 2 sets of data A and B . both A and B is a 4096*2 vector. the first col is data ,second col is Corresponding sample clock.

if true
  % code
[data(:,1),time(:,1)]=textread('1.txt','%n%n');
[data(:,2),time(:,2)]=textread('2.txt','%n%n');
end

i plot the data and it looks like Fig 1

if true
  % code
plot(data);
end

Fig1

I also plot the clock in Fig2

i want to align the data1 and data 2 according to their clok , how can i do.

Answer 1

[Matt Tearle]

If by "align the data" you mean you want both data1 values and data2 values at some common time values, then you will probably need to interpolate both vectors onto a time vector of your choosing. This could be a little tricky given that the first 1000 values of time(:,1) and time(:,2) are pretty much constant but not equal, but anyway, in general you want to do something like this:

N = 2000;
t = linspace(min(time(:)),max(time(:)),N);  % make a vector of times
data1 = interp1(time(:,1),data(:,1),t);  % interpolate first column of data onto t
data2 = interp1(time(:,2),data(:,2),t);  % interpolate second column of data onto t
plot(t,data1)
hold on
plot(t,data2)

Now you have both data1 and data2 with N points, at the time values given in t. You can be fancier about how you make t, such as using intersect or union.

[If by "align" you just mean see them aligned on the plot, then just do what Orion suggested.]

[song]

thank you i will try your method .

Answer 2

[Orion]

just do :

plot(time,data)

[song]

thank you ,but you misunderstood my mind.