CODEWITHSUNDEEP
matlabtime
user2126062
user2126062

Reputation: 121

subtracting one from another in matlab

My time comes back from a database query as following:

kdbstrbegtime =
    09:15:00

kdbstrendtime =
    15:00:00

or rather this is what it looks like in the command window.

I want to create a matrix with the number of rows equal to the number of seconds between the two timestamps. Are there time funcitons that make this easily possible?

Upvotes: 0

Views: 979

Answers (2)

M.J Jalali
M.J Jalali

Reputation: 110

First you have to convert kdbstrendtime and kdbstrbegtime to char by datestr command, then:

time = datenum(kdbstrendtime )-datenum(kdbstrbegtime )
t = datestr(time,'HH:MM:SS')

Upvotes: 0

Eitan T
Eitan T

Reputation: 32930

Use datenum to convert both timestamps into serial numbers, and then subtract them to get the amount of seconds:

secs = fix((datenum(kdbstrendtime) - datenum(kdbstrbegtime)) * 86400)

Since the serial number is measured in days, the result should be multiplied by 86400 ( the number of seconds in one day). Then you can create a matrix with the number of rows equal to secs, e.g:

A = zeros(secs, 1)

I chose the number of columns to be 1, but this can be modified, of course.

Upvotes: 1

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