How to get the full precision on timestamp after using canSignalImport?

When I get the timetable from the result of canSignalImport function, I got the timetable with limited precision of timestamp although the input '.ASC' file is having more detailed precision of the timestamp.

For example, the input '.ASC' file is having number of '6321.869787', but the actual result on the timetable is '6321.9.'

However, I can see more precision on the result of canMessageImport function.

>> outMsgImport(1)
ans = 
  Message with properties:

   Message Identification
    ProtocolMode: 'CAN'
              ID: 272
        Extended: 0
            Name: 'XXXXXXXX'
   Data Details
       Timestamp: 6.3219e+03
            Data: [240 0 0 0 0 0 0 240]
         Signals: [1×1 struct]
          Length: 8
   Protocol Flags
           Error: 0
          Remote: 0
   Other Information
        Database: [1×1 can.Database]
        UserData: []

Is there anyway to create the timetable with more detailed precision in the timestamp?

Also, when I tried to change the output precision format to 'long' by using 'format long' command, I can see some more digits on the timetable from canSignalImport function. Is this the only solution?

Answer 1

[Animesh]

Hey @Il-Taek Kwon

I understand that you need more precision in your timestamp value, long format is one way to do it and it gives a precision of 15 digits after the decimal.

You can also use datetime function instead which converts your timestamp to datetime object, which have higher precision than their numeric counterpart.

time = datetime(timetable_data.Timestamp, 'ConvertFrom', 'datenum');

Note that, unlike the "format long" method, which only affects the display of the data, creating datetime objects maintains the actual precision of data.

You can refer the following documentation for more details:

datetime object : https://in.mathworks.com/help/matlab/ref/datetime.html