micro second access
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im still confusing about how to access time processing form pc using matlab, and give the precise until micro seconds, thanx
1 个评论
Jan
2011-5-25
In the current form, this is neither a question, nor does it contain enough details to be solved. Please read: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer .
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Walter Roberson
2011-5-20
0 个投票
The organization I work for runs one of the Atomic Clocks that is used to define the international standard time. I could ask a colleague to write down the exact time to better than 1 in 10^15 of a second. The colleague could send me that time by courier, and then I could send you the time in a letter, if you send me your physical mailing address. How does that sound? You would get the letter with the time indicated to far higher precision than you need.
9 个评论
Paskah Nainggolan
2011-5-24
Walter Roberson
2011-5-24
I was able to extract a time from the servers at work. It was 24-May-2011 01:05:49.150560703 . Please synchronize your clocks appropriately.
Jan
2011-5-24
@Walter: UTC or a specific timezone?
Walter Roberson
2011-5-24
Local Apparent Sidereal Time (LAST). Paskah will need to apply the appropriate relativistic corrections for his location (measured to at least 15 cm accuracy.)
Paskah Nainggolan
2011-5-25
Jan
2011-5-25
@Paskah: Do not get more confused than necessary. You can synchronize a clock to "24-May-2011 01:05:49.150560703" only exactly at "24-May-2011 01:05:49.150560703" - but there is no way to know the exact time before your clock is synchronized.
Walter replied an answer, which is impossible to apply, to a question, which is impossible to answer -- and this sentence is either nearly or absolutely impossible to understand.
Paskah Nainggolan
2011-5-25
Jan
2011-5-25
Why did you accpet this answer? Does it solve your problem?
Paskah Nainggolan
2011-5-25
更多回答（1 个）
Jan
2011-5-20
1 个投票
Your question is still not getting clear to me. I miss the details.
As far as I remember, we've suggested FEX: HighAccuracyTimer already. I do not assume that there is any better soltuion. If you need more accuracy, use a real-time-operating system and ask your local Mathworks distributor, if Matlab is the best choice for your problem.
7 个评论
Paskah Nainggolan
2011-5-24
Jan
2011-5-24
It would be useful, if you describe this confusion with any details. You are asking repeatedly without explaining the necessary details. Unfortunately it is absolutely impossible to reduce your confusion as long as you do not explain, what you want to achieve. What is "accessing the micro-second"?
Walter Roberson
2011-5-24
Or you could use the ActiveX control that I cited earlier.
Paskah Nainggolan
2011-5-25
Jan
2011-5-25
@Paskah: Fine. Now we know what kind of problem you are working on. As next step you can explain if you use Matlab, embedded Matlab, Simulink or what ever. Then it would be necessary to know, if you do some real-time operations or if the signal is recorded as a vector. For the later the HighAccuracyTimer is totally useless and my suggestion is clearly a result of wild guessing.
Please, take the time to explain all available details by editing the question on top of this thread, instead of creating new threads or hiding such important information in the comment section.
Paskah Nainggolan
2011-5-25
Jan
2011-5-25
@Paskah: No. It is definitely impossible to post source code concerning a topic, as long as you do not explain, what the topic is.
Have you read my above comment?? Do you have a reason not to explain the details I've asked for??
Sorry, I get the impression, that your questions are trolling and just waste my time. I'm stopping to answer here. Perhaps somebody else can bring you to post any details about your problem - good luck.
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2011-5-20
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