Changing Resolution of Time Series Data

I work with a lot of time series data at differing resolutions but mainly daily and hourly. However, the raw data can often come in at 15 min or 30 min resolution. The data are received in a struct with 4 fields: tag, meter, read and timestamp. I am certainly capable of writing some code to sum up this raw data to hourly or daily resolution but it may not be the most efficient or readable code. Therefore, could you please leave me with some starting ideas, useful functions or sources of information that might be be of some use.

A direct, concise question would be: "How should someone go about summing up high resolution data?".

Answer 1

[Walter Roberson]

One approach would be to use a table and then to use the grouping variables in calculations; see http://www.mathworks.com/help/matlab/matlab_prog/calculations-on-tables.html#zmw57dd0e23027