how to convert datenum?

I have many time-datenum codes from olr.day.mean.nc. the one is 17298624 for the right result conver to datestring : june 6, 1974. but I got the wrong result. please help

THX

[the cyclist]

I don't know what olr.day.mean.nc is. What makes you think it is equivalent to a MATLAB datenum?

[Star Strider]

I did a search for it. Go to NOAA Daily (non-interpolated) Outgoing Longwave Radiation (OLR) and find appropriate software to read the files. Another possible source of information is Re: Rewriting nc files.

Have fun!

Answer 1

[the cyclist]

Thanks to Star Strider's investigative work, I found this page that says that the OLR value is the number of hours since 1-1-1 00:00:00. This suggests to me that your conversion should be

datestr(17298624/24+365)

That's a few days off from the date you specify, but it is close.

Also, this page specifically discusses use of MATLAB to read files from this data source.

[Salman]

thank u so much