Calculate mean and st dev from hist weather data

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Endric Schenk
Endric Schenk 2016-4-3
评论： Star Strider 2016-4-3
Hi,
I have hourly weather data for every year from 2000-2013. Please see attached for the weather data format.
I would like to determine the mean as well as st dev values for every hour!
Can you please support?
best

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回答（1 个）

Star Strider
Star Strider 2016-4-3
Maybe I’m missing something in your description, but with one scalar value for each hour, the mean is that value, and the standard deviation is 0 by definition.
  2 个评论
Endric Schenk
Endric Schenk 2016-4-3
I have data from year 2000 through 2013, which mean that I have 13 values, for example, for July 3rd 1pm. Sorry for the too short description above.
Star Strider
Star Strider 2016-4-3
I have to imagine what your data look like, so I created a column vector of 13 years of hourly wind data, then reshaped it to a 24-row matrix, and took the statistics along the rows:
WindSpeed = randi(40, fix(365.25*13)*24, 1); % Create Wind Speed Data As One Column Vector (No Missing Data)
WindSpeed_Hrs = reshape(WindSpeed, 24, []); % Matrix (24xN)
WindWpeedMean = mean(WindSpeed_Hrs, 2); % Take Mean By Rows, Across Columns
WindWpeedStDv = std(WindSpeed_Hrs, [], 2); % Take Mean By Rows, Across Columns

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