Problem with "datenum" and "datetime" functions

조회 수: 4 (최근 30일)
Peter Valent
Peter Valent 2019년 4월 29일
편집: Shubhra S 2021년 9월 8일
I need to extract date information from a formated date string. I have used both datenum and datetime functions but both of them returned an error. However, when I run the code on a different computer it worked well. Here is the simple code and the corresponding error:
Example for DATENUM:
datenum('11/02/2005 13:10:00','dd/mm/yyyy HH:MM:SS')
datenum('11/02/2005 13:10:00','dd/mm/yyyy HH:MM:SS')
Error: Invalid text character. Check for unsupported symbol,
invisible character, or pasting of non-ASCII characters.
Example for DATETIME:
datetime('11/02/2005 13:10:00','InputFormat','dd/MM/yyyy HH:mm:ss')
datetime('11.02.2005 13:10:00','InputFormat','dd.MM.yyyy HH:mm:ss')
Error: Invalid text character. Check for unsupported symbol,
invisible character, or pasting of non-ASCII characters.
Why don't the functions work on my computer?
  댓글 수: 3
Peter Valent
Peter Valent 2019년 4월 29일
@Stephen Cobeldick: I think that no example script is neccesary. When I copy the two lines of code given in the question I get the error on one computer but no error at another one.
The specs of the PC where it throws error are: WIN10, MATLAB R2018b - academic use.
The specs of the PC where it does not throw error are: WIN10, MATLAB R2017a - academic use.
Moreover, the following code also doesn't work on the first PC and works on the second PC:
sscanf('10/10/10 10:10:10','%d/%d/%d %d:%d:%d')
Shubhra S
Shubhra S 2021년 9월 8일
편집: Shubhra S 2021년 9월 8일
I am also facing a similar error.The function works on one pc and doesn't work on another

댓글을 달려면 로그인하십시오.

채택된 답변

Sean de Wolski
Sean de Wolski 2019년 4월 29일
I was able to reproduce this by copying your code from above. It appears the opening ( is bad (right where the arrow is)
datetime('11/02/2005 13:10:00','InputFormat','dd/MM/yyyy HH:mm:ss')
Deleting your ( and replacing with my ( fixed it.
Further investigating it looks like there is an invisible character after the (
int32('(')
ans =
1×2 int32 row vector
40 65279
  댓글 수: 1
Peter Valent
Peter Valent 2019년 4월 30일
I have addet the following check, which solved the problem.
textToConvert = '11/02/2005 13:10:00';
acceptedCharacters = int32([' ','.','/',int32(arrayfun(@num2str,0:9)),':']);
textToConvert = textToConvert(ismember(int32(textToConvert),acceptedCharacters));
datenum(textToConvert,'dd/mm/yyyy HH:MM:SS')

댓글을 달려면 로그인하십시오.

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Dates and Time에 대해 자세히 알아보기

제품


릴리스

R2018b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by