Making decade time-series

Hello,

I have time-series data where smallest unit of time is 1 year (i.e. the series increases in yearly increments and there is no month value.

i.e.

1978
1979
1980
1801

How should I change the code to group by the series by decades?

dt = Year; % yearly increments

% How should the next line change for only yearly increases - no months?
[groups, groupID] = findgroups(floor(year(dt)/10)*10); 
% Compute decade means and ignore NAN values
decMeans = splitapply(@(x)mean(x,'omitnan'),Precip,groups);
% Display results as a table
results = table(groupID.', decMeans.','VariableNames',{'Decade','MeanTemp'});

Thank you

[Walter Roberson]

What is the difference between this question and your earlier https://www.mathworks.com/matlabcentral/answers/496771-find-timeseries-mean-for-10-years ?

Answer 1

[dpb]

roundyrs=fix(years(dt)/10)*10;
n=histc(roundyrs,min(roundyrs):10:max(roundyrs));

results in

>> [[min(roundyrs):10:max(roundyrs)].' n]
ans =
        1800           1
        1810           0
        1820           0
        1830           0
        1840           0
        1850           0
        1860           0
        1870           0
        1880           0
        1890           0
        1900           0
        1910           0
        1920           0
        1930           0
        1940           0
        1950           0
        1960           0
        1970           2
        1980           1
>>