Looping string array into parsed timestamp
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I have the following data that I would like to parse into hours:minutes:secs to plot against other data.
Here is my code that is causing issues with the indexing.
TS = ["085423","085428","085431","085502"];
TS = TS';
for i = 1:length(TS)
timestr = TS(i);
end
hours = timestr(1:2);
minutes = timestr(3:4);
secs = timestr(5:6);
formatted_time_str = [hours, ':', minutes, ':', secs];
Any insight is appreciated. Thank you.
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Stephen23
2024 年 9 月 17 日
編集済み: Stephen23
2024 年 9 月 17 日
"... that is causing issues with the indexing."
Because you are mixing up indexing into string arrays with the characters contained within them. Not the same things at all: indexing into a string array indexes into the string array, not into the characters it contains (as you incorrectly assumed).
TS = ["085423","085428","085431","085502"]
Method one: returns a string array:
FS = extractBefore(TS(:),3)+":"+extractBetween(TS(:),3,4)+":"+extractAfter(TS(:),4)
Method two: returns a char matrix:
FS = repmat(':',numel(TS),8);
FS(:,[1:2,4:5,7:8]) = char(TS(:))
5 件のコメント
Stephen23
2024 年 9 月 18 日
"In trying to plot the FS data (timestamp) against numerical data I get an error message:"
If you are trying to plot with this data, then you are likely much better of using DURATION objects rather than fiddling around with text or numerics:
TS = ["085423";"085428";"085431";"085502"];
H = str2double(extractBefore(TS(:),3));
M = str2double(extractBetween(TS(:),3,4));
S = str2double(extractAfter(TS(:),4));
D = duration(H,M,S)
Y = rand(size(D));
scatter(D,Y)
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