Wrong date while importing .csv

3 次查看（过去 30 天）
Ancalagon8
Ancalagon8 2018-8-24
评论： Ancalagon8 2018-9-3
Having a problem when i import daily .csv files. More specifically, when i plot my xy data(x axis contains date and time stamp), in every different daily file, MATLAB shows todays date. Any ideas?
  5 个评论
显示 3更早的评论
Stephen23
Stephen23 2018-8-24
编辑：Stephen23 2018-8-24
@Sirius8: this is what one line of the file looks like:
00:00:0;0.0;0.00540500736377
Where is the date? Please show us which parts of that line contain date data.
Ancalagon8
Ancalagon8 2018-8-24
You are right. The date was not in the data but in the name of the csv

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

jonas
jonas 2018-8-24
编辑：jonas 2018-8-24
The date is not automatically assigned because it's not in the data but in the name of the file. You could do something like this:
files=dir('folderpath~\*.csv');
for i=1:length({files.name})
date=files(i).name;
date=regexprep(date,'.csv','')
data=readtable(files(i).name);
t{i}=data{:,1}+datetime(date);
xy{i}=data{:,2:3}
end
Now you have two cell arrays, t and xy, where the former has all time data and the latter all other data.
  18 个评论
显示 16更早的评论
jonas
jonas 2018-8-24
编辑：jonas 2018-8-24
You're welcome! Note that you can just remove the curly braces from the t{i} if you want to achieve that. I put the results in a cell array as I figured you have several data sets that you want to load and store.
Also, don't use datetime as a variable name!!
Ancalagon8
Ancalagon8 2018-9-3
In general it works. At some daily files i get this error in the line "tday=cell2mat(tday);"
"Error in cell2mat (line 83) m{n} = cat(1,c{:,n});"
files=dir('*2018-08-25.csv');
for i=1:length({files.name})
date=files(i).name;
date=regexprep(date,'.csv','');
din=importdata(files(i).name,';');
tday=cellfun(@(x) str2double(strsplit(x,':')),din.textdata,'uniformoutput',false);
tday=cell2mat(tday);
ti=hours(tday(:,1))+minutes(tday(:,2))+seconds(tday(:,3))+datetime(date);
xyi=din.data;
end

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Language Fundamentals 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by