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Time format conversion command

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T
T 2012-10-16
This post is related to this thread:
http://www.mathworks.com/matlabcentral/answers/51019-synchronize-time-from-a-database-and-csv-file-and-plot
If I want to convert
36:40.0
to
time in seconds, how do I do this?
  2 个评论
Matt Fig
Matt Fig 2012-10-16
What form is that? Is it a string and many in a character array or a cell array or what?
A = ['36:40.0';'36:41.0';'34:40.3']; % Like this?
A = {'36:40.0';'36:41.0';'34:40.3'}; % Like this?
Azzi Abdelmalek
Azzi Abdelmalek 2012-10-16
are your data in a text file?

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2012-10-16
编辑：Azzi Abdelmalek 2012-10-16
t={'36:40.0' ,'37:40.0' ;'39:40.0' ,'31:40.0'}
out=cellfun(@(x) sum(cellfun(@str2double, regexp(x,'[:.]','split')).*[3600 60 1]),t)
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Azzi Abdelmalek
Azzi Abdelmalek 2012-10-18
编辑：Azzi Abdelmalek 2012-10-18
Anthony, I suggest that you reformulate and repost your question, let it brief and very clear.
T
T 2012-10-18
Actually I used the following:
[Y, M, D, H, MN, S] = datevec(data{2}); out = H*3600+MN*60+S;
It works!

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更多回答（1 个）

Matt Fig
Matt Fig 2012-10-16
编辑：Matt Fig 2012-10-16
If you have a cell array, I would do this:
A = {'36:40.0';'36:40.1';'34:40.3'}; % A cell array
B = '${num2str(str2num($1)*60+str2num($2))}';
B = regexprep(A,'(\d+):(\d+\.\d*)',B)
If you have a character array, then:
A = ['36:40.0';'36:41.0';'34:40.3']; % A character array.
B = '${num2str(str2num($1)*60+str2num($2))}';
B = char(regexprep(cellstr(A),'(\d+):(\d+\.\d*)',B))
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Matt Fig
Matt Fig 2012-10-16
编辑：Matt Fig 2012-10-16
You seem to show where you converted to datenumbers using the DATENUM command. So why would it be surprising that you get datenumbers?
Show what this shows:
data{2}(1:3) % Or, what is in data{2}... strings?
If you don't see the strings in there, take the time to explore the data cell array before you run all these conversions on it. What is in data{1}? How about data{3}, etc...
Matt Fig
Matt Fig 2012-10-16
编辑：Matt Fig 2012-10-16
Please show the first few elements of data{2}. Do so in another comment, don't go up and edit old comments or I cannot follow the conversation.

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