Determining maximum and minimum Daily temperatures
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I have Data from 1985 to 2017 containing the recorded Temperature every hour . The First column contains
1.Date format :
- YYYYMMDDHH
FROM (1985010100 ) (2017123123 )
The second column conains
2.Temperature every hour
Question: I want to determine the maximum and minimum daily temperatures from 1985 to 2017 .
Thank you
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回答（1 个）
Jon
2019-4-15
If you have exactly 24 data points for each day (one for every hour) then you could use this approach, assume you have your data in an a two dimensional array named data
% determine total number of days of data
numDays = length(data)/24;
% reshape your temperature data so that you have a column for each day, with a row for each hour in the day
Tdata = reshape(data,24,numDays)
% calculate your min and max for each day
dailyMin = min(Tdata);
dailyMax = max(Tdata);
If your data is somehow less regular and you are missing entries for certain hours then you will have to do something more involved
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Jon
2019-4-15
you could also use accumarray for this purpose https://www.mathworks.com/help/matlab/ref/accumarray.html
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2019-4-15
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