How can I find same values in (data range) matrices?

Hello!

I'd like to write a script to find same values from different matrices but the first matrix contains different time ranges. for example: I have an 'events' matrix contains time events. Another matrix (start) contains start time of waves, and (end) contains end time of waves.

I have four matrix array in rows:

events

     0.165
     0.187
     0.982
     1.258
     1.569
     2.263
start             end          time_series

     0.002            0.189                0.001
     0.196            0.990                0.002
     1.145            1.601                0.003
     1.698            2.996                0.004
     .....            .....                .....

So I would create a script, that find the time events in the different time ranges from matrix contains the continues time series data.

My code:

lgt_start = length(start);

lgt_end = length(end);

lgt_events = length(events);

for i = 1:lgt_events;

   for l = 1:lgt_start;

      for m = 1:lgt_end;

          times(i,1) = find (time_series(lgt_start(l,1):lgt_end(m,1)) == events(i,1));  

      end

   end

end

When I run this script the Matlab write the following error: 'Subscripted assignment dimension mismatch'.

Can you help me somebody how to correct the script?

Thank you for the answers,

Janos.

Answer 1

[Star Strider]

I cannot run your code, but one possible solution would be to create ‘times’ as a cell array:

times{i} = find (time_series(lgt_start(l,1):lgt_end(m,1)) == events(i,1));

I also suggest changing your variable name to ‘time_vct’ or something else that is meaningful in the context of your code, because times is the name of a built-in MATLAB function that does element-wise multiplication. This will cause problems if you need to use it in a function, as ‘@times’.

[Janos Horváth]

Thank you for your answer. I try to run the code that you offer. Yes indeed the name-time not a best choice as matrix name.... thanks.

[Star Strider]

My pleasure!

Answer 2

[Image Analyst]

Don't test for equality with floating point numbers , test for tolerance. See the FAQ.