Hello Jim
you can use ashift() from the same library which does (I think) what you
want.
HTH, Robin
On 07/02/2010 12:05 PM, Jim Hargreaves wrote:
Dear List,
I have a 2,000x10,000 array of time domain data which when plotted
draws a distinct pulse. The matrix is 10,000 pulses of length 2000. I
would like the pulse to be shifted so that the peak (which.max of the
pulse data) is consistently at point 400.
I don't want to use loops as it'll take a long time. The problem with
using apply is the pulse peak varies for each pulse, so I want to use
something like:
apply(really_mean_pulse, 2, shift, which.max(really_mean_pulse))
(Using the shift function from the "magic" library)
This doesn't work, so I need to modify this so that the argument to
shift is dependent on the column the shift is being applied to.
Any suggestions would be greatly appreciated!
Kind Regards,
Jim Hargreaves
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Robin K. S. Hankin
Uncertainty Analyst
University of Cambridge
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