How to convert time in nanosecond to numeric value in order to be able to compare these timeseries?

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Mantas Vaitonis 2018-11-15

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https://ww2.mathworks.cn/matlabcentral/answers/430037-how-to-convert-time-in-nanosecond-to-numeric-value-in-order-to-be-able-to-compare-these-timeseries

编辑： madhan ravi 2018-11-16

Hello,

I have the number of *.csv files that are same structure (same column number), but row numbers are different. I use readtable to upload data to matlab. I need to compare timeseries of different csv files. The example of timeseries:

'08:34:37.762296992'

'08:34:37.762450580'

'08:34:37.762460422'

'08:34:37.762472108'

'08:34:37.762543205'

'08:34:37.762673812'

How to convert this type to timeseries to numeric value in order to be able to compare them?

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madhan ravi 2018-11-15

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编辑：madhan ravi 2018-11-16

在 MATLAB Online 中打开

T=readtable('mycsv.csv')
datetime(T{:,1},'InputFormat','HH:mm:ss.SSS') %highly recommended

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Peter Perkins 2018-11-15

在 MATLAB Online 中打开

Also: these two

datenum(T{:,1})
datevec(T{:,1})

aren't really gonna work correctly, because datenums and datevecs just don't support timestamps to ns resolution.

madhan ravi 2018-11-16

Thank you for the information @Perkins

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MATLAB Language Fundamentals Data Types Dates and Time

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