how to start time from 0s

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mira
mira 2015-4-5
编辑： Stephen23 2015-4-6
Hi, I am creating a GUI in matlab. I have a button and the time when I press the button is recorded. I manage to do that using clock. However, is there any way the start of the time is from 0s? Thanks.
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Jan
Jan 2015-4-5
Please edit the question and add much more details. "Using clock" does not explain clearly, what you are doing, therefore I cannot guess what the problem is.

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采纳的回答

Stephen23
Stephen23 2015-4-6
编辑：Stephen23 2015-4-6
Here are two simple ways to start a timer that counts from zero:
  • Use tic and toc to do the timing.
  • Use now, save the start time, and subtract this from all subsequent time values.
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mira
mira 2015-4-6
编辑：mira 2015-4-6
Hi, Can you show me how to save the start time using now? because I already use now, but seems not working. Much appreciated.Actually, I want to save the time when pressing the button.

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更多回答（2 个）

Mahdiyar
Mahdiyar 2015-4-6
Hi mira
you can also use command "clock" as follows:
Start_Time = clock
it gives you the accurate time as following matrix
[year month day hour minute seconds]
Regrads
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mira
mira 2015-4-6
编辑：mira 2015-4-6
Hi Mahdiyar, I am already using the command just like you say,but the thing is how I want to save the start time. This because the first pressed button already need to save the time.so I have to minus the time of first press button with the start time. Hope you understand what I mean.

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mira
mira 2015-4-6
thank you all.I get what I want now.

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