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Construct the second line of the title by extracting the date and time from the MSLP field and converting into an appropriate string - do this in the Macro code.
Hints:
- this procedure will be covered in Customising Your Plot Title
- if you have a fieldset variable called
msl_grib, the following line will extract the date at which the field is valid:msl_date = grib_get_long(msl_grib, 'validityDate')
- we can do something similar for the validity time
- these are extracted as integer numbers, but can be combined into a proper date variable in Macro:
full_date = date(msl_date) + hour(msl_time)
- use the
string()function to construct a date string similar to the one used in the current title- see String Functions for details of how to use it
- insert this into the
mtext()function instead of the current title - it is now more robust - if you use data from a different date or time, the title will still be correct
- note that this method will not work directly if you want to generate an animation from different time steps of data
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