Hi Ben,
I tried including the date info into my data files as you suggested and it
works! Thank you very much for help.
Regards,
Clare.
On Mon, Jun 18, 2012 at 9:10 PM, Benjamin Root <ben.r...@ou.edu> wrote:
>
>
> On Mon, Jun 18, 2012 at 6:42 AM, Clare Soh <clare07112...@gmail.com>wrote:
>
>> Hi,
>>
>> I'm trying to plot some data against time using the following code:
>>
>> r = mlab.csv2rec(filename)
>> self.axis.plot(r.time, r.jb_sizems)
>> hfmt = dates.DateFormatter('%H:%M:%S.%f')
>> self.axis.xaxis.set_major_formatter(hfmt)
>> self.axis.set_title("JB Size")
>> self.axis.set_xlabel("Time")
>> self.axis.set_ylabel("JB Size(ms)", color='b')
>> self.axis.set_ylim(bottom=0)
>> for tl in self.axis.get_yticklabels():
>> tl.set_color('b')
>> self.axis.grid()
>> self.figure.autofmt_xdate()
>>
>> Everything works well, except for the cases when time ranges from before
>> 12am to after 12am. For example I have one csv file with time values
>> ranging from 23:04:09.367000 to 00:08:09.357000. By right I should see a 1
>> hour plot with x-axis ranging from 23:xx:xx.xxxxxx on the left to
>> 00:xx:xx.xxxxxx on the right, but I got a "24 hour" plot instead with
>> x-axis ranging from 00:xx:xx.xxxxxx on the left to 23:xx:xx.xxxxxx on the
>> right. My graph therefore appeared "chopped" into 2. Anybody knows how to
>> fix this?
>>
>> Regards,
>> Clare.
>>
>>
> Clare,
>
> Without a date, this can not be handled the way you want. You can either
> make it go from least to greatest or greatest to least. Using just hours,
> you will either have to increase from 00Z to 23Z, or decrease from 23Z to
> 00Z. If you can't get a date included into the data file, you will
> probably have to do some processing of your data to add some sort of "fake"
> date to it first. This can be very tricky to do correctly. Your best bet
> is to get your data files to report the date.
>
> I hope this helps!
> Ben Root
>
>
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