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Assignment 2 and Clarifications.
 
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task 2: sample size

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From: Caijun Z.
Date: Sat 23rd May, 10:04pm
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Hi everyone,

I try to develop a histogram, it works well when i put 1000 data to test. But when 
it's over 2000 or more, it just shows nothing on the website, does anyone know the 
reason why? and how to fix it?

thanks in advance!
Juno

task 2: sample size

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From: Christopher M.
Date: Sun 24th May, 7:40am
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"Caijun Zhao"                               wrote:

> I try to develop a histogram, it works well when i put 1000 data to test. But when 
> it's over 2000 or more, it just shows nothing on the website, does anyone know the 
> reason why? and how to fix it?

Hi Juno,

You may need to track down what is causing the problem - is it because you have too many 
entries,  or is it something wrong in parts of the data?

With your dataset of 2000 points, divide it into 2 halves of 1000, or 4 of 500.
Can each of the parts now be displayed, independently?
If so, there may be a limit on the number of points possible.

task 2: sample size

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From: Caijun Z.  O.P.
Date: Sun 24th May, 10:33am
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thanks a lot for the advice! I just check my data again, turns out there are some invalid 
characters around 1600th, and it works well after fixing this problem :)

task 2: sample size

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From: Christopher M.
Date: Mon 25th May, 1:31pm
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"Caijun Zhao"                               wrote:

> thanks a lot for the advice! I just check my data again, turns out there are some invalid 
> characters around 1600th, and it works well after fixing this problem :)

Thanks for that.
Was there something weird in the input data file itself that prevented it from being plotted,  or 
just that you were processing/formatting it incorrectly?

task 2: sample size

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From: Caijun Z.  O.P.
Date: Tue 26th May, 11:57pm
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"Christopher McDonald" <chris.                     wrote:

> "Caijun Zhao"                               wrote:
> 
> > thanks a lot for the advice! I just check my data again, turns out there are some invalid 
> > characters around 1600th, and it works well after fixing this problem :)
> 
> Thanks for that.
> Was there something weird in the input data file itself that prevented it from being plotted,  or 
> just that you were processing/formatting it incorrectly?
well, it's me cutting the wrong field of data. because some data formats are different with others, and 
i did't notice that difference which makes some data are missing after i cut the same field. :)

task 2: sample size

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From: Christopher M.
Date: Wed 27th May, 3:29pm
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"Caijun Zhao"                               wrote:

> well, it's me cutting the wrong field of data. because some data formats are different with others, and 
> i did't notice that difference which makes some data are missing after i cut the same field. :)

OK, glad you found the problem - and a good hint for others to check their input data.
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