I get error message when converting epoch date to number

 >> todatenum(unix_time)
 Undefined function 'todatenum' for input arguments of type 'double'.

Sinze I am a recently new user, could anyone help me in solving this issue.

[Geoff Hayes]

Robert - according to todatenum, the input to this function is a CDF epoch object. Presumably, given the error message, your unix_time is a double or an integer in seconds since 1970. Is this correct?

[Robert Winkel]

Geoff, thanks, yes that could be true. Do you know how to convert my double (epoch) to the Matlab date?

[Walter Roberson]

R2014b or later, use datetime objects with 'ConvertFrom', 'posixtime'. Otherwise grab a routine from the File Exchange.

Answer 1

[Walter Roberson]

As Geoff indicates, you are trying to call todatenum with the wrong kind of input object.

If you are trying to convert a double, then you need a different routine. If you are using R2014b or later, you can use datetime objects with 'ConvertFrom', 'posixtime'. If you are using an older release, then you can find unix (posix) time conversion routines in the File Exchange.