Time Format Data Conversion

Here is one set of time data in seconds that is imported 3401.82409375 3443.09343269231 3450.68662723214 3456.25735677083 3458.4955078125 3468.43663570804 3479.25066346154 3481.85364375 4591.54526201923

and after importing this data, the output is:

 1.0e+003 *

    3.4018
    3.4431
    3.4507
    3.4585
    3.4684
    3.4793
    3.4819

my concern is with another set of data that I am trying to syncronize with the other set of data: 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0

Using the following script:

[Y, M, D, H, MN, S] = datevec(data{2}); out = H*3600+MN*60+S; subplot(2,1,2), plot(out, data_to_plot)

gives me the following output:

   3.8629
    3.8630
    3.8630
    3.8630
    3.8630
    3.8630
    3.8630
    3.8630
    3.8630
    3.8630

Should I expected a similar magnitude of e+003? If not, how can I shift the second set of data to match the one on the left? I tried adding 3000 but it remained constant.

[José-Luis]

Maybe it's just me but this question is not very clear.

"my concern is with another set of data that I am trying to syncronize with the other set of data: 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0 42:46.0"

What does that mean? 42:46 is a row vector. How's the variable data look like?

[T]

So there are two columns of data.

The first being 3401.82409375 etc.

the second being 42:46.0 etc

is that clear?

[T]

Why would the following:

[Y, M, D, H, MN, S] = datevec(data{2}); out = H*3600+MN*60+S;

Give me values of the order 0e+003 * 3.4018 3.4431 and so on as opposed to

3401.8 and 3443.1 and so on?

[Walter Roberson]

Give the command

format long

and display the output again.

Answer 1

[Walter Roberson]

datevec(data{2}, 'MM:SS.FFF')

would be my guess. The output would be in the same magnitude as the 3.4801E3... but about 1000 smaller. Your 3400-ish values are on the order of 50 minutes rather than 42.

[T]

I generate a weird signal when I plot the data using that command. I also obtain an arbitrary vertical line 2000 s after the main signal.

[T]

Sorry, what did you mean of the order of 50 minutes rather than 42? Of what significance is this? I just leave the data as it is.