calculate monthly sum based on weekly data

Hi,

I have a variable termed A (with the size of 75*75*1566 indicating the long., lat., and time respectively), it covers the period between 1981/01/01 and 2010/12/31 (i.e. 1566 weeks) (In the .nc file the time dimension only shows values from 0 to 1565). I want to calculate the sum for each month of the period based on the weekly model output, but I don't know how to do it.

Do any professionals know how to solve this problem? Many appreciations!

Answer 1

[BhaTTa]

@kim chan, to calculate the monthly sum from weekly data in MATLAB, you need to map each week to its corresponding month and then sum the values for each month. Below i have given the step-by-step guide to help you achieve this:

1. Load the Data: First, load your .nc file using the ncread function.
2. Create a Date Mapping: Generate a date vector that corresponds to each weekly data point. This will help you map each week to a specific month.
3. Sum the Weeks for Each Month: Iterate through each month and sum the corresponding weeks.