Extracting specific rows with different content from a large table array

I have several tables (a x 3; double, double, string).

The first double contains Matlab Dates, the 2nd contains numbers between 0 and 1.

I would like to extract the data of specific days, e.g. SpecificDay-30:SpecificDay+10

For example, I would like to extract all 41 rows where MatDate is (SpecificDay-30:SpecificDay+10) when SpecificDay = 736958 (which is datenum(2017,09,20)).

This is how one of the tables looks like:

Thank you so much in advance!

Answer 1

[madhan ravi]

 ix = find(TaBle.MatDate == 736958);
 Wanted = TaBle{(ix-30):(ix+10), :}

Answer 2

[Turlough Hughes]

Tnew = T(T.MatDate>=SpecificDay-30 & T.MatDate<=SpecificDay+10,:);

Answer 3

[Steven Lord]

Consider storing your data in a timetable, converting your MatDate variable into a datetime array and using table2timetable (or manually creating a timetable from the variables.) If you do this you can use timerange to extract rows in a certain interval.

rng(999, 'twister') % Arbitrarily chosen to make the problem a little more interesting

% Create some sample data
N = datetime('now');
dt = N + minutes(randi([-180 180], 10, 1));
x = (1:10).';

% Build a timetable
T = timetable(dt, x)

% Make the timerange to use in indexing into T
thirtyToSixty = timerange(N+minutes(30), N+minutes(60))

% Index into T
T(thirtyToSixty, :)

Answer 4

[Sudheer Bhimireddy]

Convert the datenum to datetime, and then you can use the MATLAB function isbetween() to get all the indices that satisty your criteria.