Subset time series plot

I have a time series plot (y). I want divide the time series into subsets and subsequently extract the subsets separately. In other word, I want to divide the time series plot into equal chunks.

[Azzi Abdelmalek]

Post a short example

[Bruno]

I want divide the following plot into 7 equal chunks (subsets) and extract separately

t=0:0.001:10; x=0.2*cos(t) + cos(1.4*t) + 0.8*cos(5.2*t) + 0.02*randn(1, 10001);

Answer 1

[Amit]

t = 0:0.001:10;
x = 0.2*cos(t) + cos(1.4*t) + 0.8*cos(5.2*t) + 0.02*randn(1, 10001);
N = 7; % Number of divisions
I = 1:ceil(numel(t)/N):numel(t);
if (I(end) ~= numel(t))
   I = [I numel(t)];
end
for j = 1:N
   Y{j,1} = [t(I(j):I(j+1))' x(I(j):I(j+1))'];
end

Here, Y is a cell array where every cell has the T and x subsections.

[Bruno]

I want label the subsections (as m1,m2,m3 ……) on plot.

[Amit]

Once you plot all the sections, you can use

legend('m1','m2' .....)

[Bruno]

How I can plot all sections? Y is cell array

[Amit]

colorD = 'bgrcmyk';
for j = 1:N
  plot(Y{j}(:,1),Y{j}(:,2),colorD(1));
  hold on;
end

[Bruno]

I want see 7 windows that indicate the subsections on plot. I want label the windows

[Amit]

see figure documentation: http://www.mathworks.com/help/matlab/ref/figure.html

[Bruno]

I want lines that separate the subsections on plot and I want label each subsection.

[Amit]

titleW = {'w1','w2','w3' ...}; % You fill it
for j = 1:N
  figure;
  plot(Y{j}(:,1),Y{j}(:,2));
  title(titleW{j});
end

[Bruno]

I have large data sets, I need to see lines or points that indicate the start and end of each subsections on the plot. Subsequently I can select the subsections I am interested.

[Amit]

The code here plots every subset in a new figure. Thus you can see this.

The code I wrote pretty much covers what you asked. Try MATLAB documentation for different functions used here and you can figure out what changes you need to make from the code here to get what you want. With any effort from your side, this would spoon feeding.

[Bruno]

Amit, Thank you for your kind cooperation