Problem with formatting operators - textscan

조회 수: 3 (최근 30일)
JSL
JSL 2013년 9월 25일
편집: Stephen23 2025년 4월 8일
I'm trying to bring in some data from a .csv file, but I can't seem to get the formatting operators correct when using textscan(). I'm sure this problem is trivial for someone with more experience. My data is all on one line separated by commas. Format:
XX mins YYYY-MM-DD hh:mm:ss, XX mins YYYY-MM-DD hh:mm:ss, XX mins YYYY-MM-DD hh:mm:ss,
Example data:
26 mins 2013-09-17 09:01:45, 29 mins 2013-09-18 16:53:12, 33 mins 2013-09-19 18:24:27,
After using fopen to open the file, I am trying to use textscan:
f = fopen('data.csv');
c = textscan(f,????,'Delimiter',',');
I've tried experimenting with different formatting operators at ????, but can't get anything that makes sense. I would like to extract the following as integers:
XX, YYYY, MM, DD, hh, mm, ss
Help?

답변 (1개)

Stephen23
Stephen23 2025년 4월 8일
편집: Stephen23 2025년 4월 8일
txt = '26 mins 2013-09-17 09:01:45, 29 mins 2013-09-18 16:53:12, 33 mins 2013-09-19 18:24:27,';
Directly obtaining the integers you requested:
tmp = textscan(txt,'%f %*[^ ]%f%f%f%f%f%f', 'EndOfLine',',', 'Delimiter',{'-',':'}, 'CollectOutput',true)
tmp = 1x1 cell array
{3x7 double}
tmp{1}
ans = 3×7
26 2013 9 17 9 1 45 29 2013 9 18 16 53 12 33 2013 9 19 18 24 27
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
Or an alternative solution using DATETIME for the timestamp:
tmp = textscan(txt,'%f%*s%D%T', 'EndOfLine',',')
tmp = 1x3 cell array
{3x1 double} {3x1 datetime} {3x1 duration}
vec = tmp{1}
vec = 3×1
26 29 33
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
dt = tmp{2}+tmp{3};
dt.Format = 'yyyy-MM-dd HH:mm:ss'
dt = 3x1 datetime array
2013-09-17 09:01:45 2013-09-18 16:53:12 2013-09-19 18:24:27
dt.Year
ans = 3×1
2013 2013 2013
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
dt.Month
ans = 3×1
9 9 9
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
% etc...
dt.Second
ans = 3×1
45 12 27
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>

카테고리

Help CenterFile Exchange에서 Standard File Formats에 대해 자세히 알아보기

태그

Community Treasure Hunt

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

Start Hunting!

Translated by