how to start time from 0s

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mira 2015-4-5

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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 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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Answer 1

Stephen23 2015-4-6

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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 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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Answer 2

Mahdiyar 2015-4-6

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在 MATLAB Online 中打开

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]

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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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