Making decade time-series

Question

Sarah Yun 2019-12-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/496793-making-decade-time-series

回答： dpb 2019-12-16

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.

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

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Walter Roberson 2019-12-16

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

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Answer 1

dpb 2019-12-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/496793-making-decade-time-series#answer_406494

在 MATLAB Online 中打开

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
>> 