t =
1×4 datetime array
18-Jul-2014 18-Aug-2014 18-Sep-2014 18-Oct-2014
Subtract the origin value. For example, the origin value might be the starting day of an
experiment.
dt = t - datetime(2014,7,1)
dt =
1×4 duration array
408:00:00 1152:00:00 1896:00:00 2616:00:00
dt is a duration array. Convert dt to a double array of values in units of years, days,
hours, minutes, or seconds using the years, days, hours, minutes, or seconds
function, respectively.
x = hours(dt)
x =
408 1152 1896 2616
Pass the double array as the input to the log function.
y = log(x)
y =
6.0113 7.0493 7.5475 7.8694
See Also
cellstr | char | datenum | datetime | datevec
More About
- “Represent Dates and Times in MATLAB” on page 7-2
7 Dates and Time