how to take out may to october months data from 4-d data.

sir i have four dimension daily precipitation data prec(20,22,365,96)lon,lat,day,time.how can take out may to october months from each years.please help me.

[dpb]

In what form are the dates given?

[devendra]

1/1/2005 to 31/12/2100 sir ,thank you sir in advance,

Answer 1

[the cyclist]

I don't fully understand your data layout, but this example should help you do what you want:

% Create some example data
dateList = {'2001-01-01','2001-02-01','2001-03-01','2001-04-01','2001-05-01','2001-06-01','2001-07-01','2001-08-01','2001-09-01','2001-10-01','2001-11-01','2001-12-01'}';

% Create matrix with numeric year,month,day, etc
dateVector = datevec(dateList);

% Isolate the month  
monthVector = dateVector(:,2);

% Find the months from May through Oct
indexToMayThruOct = ismember(monthVector,[5:10]);

% Purge those data from the original list  
dateList(indexToMayThruOct) = [];

[devendra]

how can apply this method in my data.sir i have four dimension (4D) data

size(prec)

ans =

    20    22   365    96

   (lon   lat  day   year)

how can take out may to october data from this? i want to take out [121:304](may to oct) from each years.this is daily precipitation data.we will take out may to oct data from day for each year.please help me sir.

[Hikaru]

If May to October data is always located in between row 121 to 304, then maybe you could use this.

prec(121:304,:) = [];

[devendra]

but i have 4d (dimension) data (lon lat day year) how can take out from data,please help me,thank you in advance.

[the cyclist]

@devendra, is your data really 4-dimensional, or is it actually 2-dimensional with 4 columns?

What is the variable type that stores your data? Is it a cell array?

Maybe this is closer to what you need. You need to try to understand the answer, not just apply it blindly.

Also, it would be useful for you to post a small example of your data.

% Create matrix with numeric year,month,day, etc
dateVector = datevec(prec(:,3));

% Isolate the month  
monthVector = dateVector(:,2);

% Find the months from May through Oct
indexToMayThruOct = ismember(monthVector,[5:10]);

% Purge those data from the original list  
prec(:,indexToMayThruOct) = [];