Re: [Gnuplot-info] Plot time related data by hour, not by day

[Thomas S. <t.s...@fz...>]

you may restrict yourself to only one separator character
- actually you have two: "," and whitespace

with only one separator character the plot would be
pretty easy, you would skip the whole date information
and only use time (e.g. whitespace as separator
everywhere):

reset
set xdata time
set timefmt "%H:%M:%S"
set format x "%H:%M"
plot 'datafilename' us 2:3

your data file would look like this:
2009-10-01 10:30:14 16 10 0 0.91 0.29 1.82 1.17

you may even shift your data to full hours if you
like to:
set timefmt "%H"


Steve Cohen wrote:
> 
> After studying this some more, I'm thinking my best approach is to 
> format my data differently, different queries, etc.
> 
> Steve Cohen wrote:
>> Suppose I have data structured like this:
>>
>> 2009-10-01 10:30:14,16,10,0,0.91,0.29,1.82,1.17
>> 2009-10-01 12:30:15,27,17,1,2.13,0.50,3.52,2.58
>> 2009-10-01 13:30:17,18,13,0,0.76,0.38,2.07,0.88
>> 2009-10-01 14:30:15,22,14,1,1.03,0.32,2.09,1.26
>> 2009-10-01 15:30:16,17,11,1,0.95,0.42,2.26,1.11
>> 2009-10-01 16:30:16,12,9,0,0.74,0.36,2.05,0.83
>> 2009-10-01 17:30:14,14,11,0,0.69,0.24,1.65,0.88
>> 2009-10-01 18:30:17,18,15,0,0.80,0.40,2.08,0.93
>> 2009-10-01 19:30:15,16,12,0,0.76,0.25,1.69,0.94
>> 2009-10-01 20:30:16,14,5,0,0.70,0.19,1.62,0.79
>> 2009-10-01 21:30:15,10,7,0,0.44,0.17,1.25,0.55
>> 2009-10-01 22:30:15,7,6,0,0.41,0.14,1.30,0.44
>> 2009-10-01 23:30:14,4,3,0,0.15,0.09,0.76,0.16
>> 2009-10-02 00:30:20,3,2,0,0.15,0.22,0.89,0.08
>> 2009-10-02 01:30:14,1,1,0,0.07,0.06,0.53,0.08
>> 2009-10-02 02:30:16,2,1,0,3.81,0.98,11.47,0.15
>> 2009-10-02 03:30:14,1,1,0,0.07,0.07,0.57,0.03
>> 2009-10-02 04:30:14,0,0,0,0.03,0.06,0.35,0.02
>> 2009-10-02 05:30:13,1,1,0,0.13,0.08,0.62,0.14
>> 2009-10-02 06:30:12,1,0,0,0.13,0.08,0.57,0.14
>> 2009-10-02 07:30:13,2,2,0,0.23,0.09,0.81,0.26
>>
>> What I want is a plot where the X-axis represents the TIME OF DAY only, 
>> without reference to the date, and the Y axes represent various 
>> measurements I want to
>> at that time over a series of days.  How do I tell Gnuplot to IGNORE the 
>> Date portion of the time and only pay attention to the time portion?  In 
>> fact, I would not mind losing the minutes and seconds either.  Thus 
>> there would be a series of points representing ta y-value at at 1 AM, 2 
>> AM, 3 AM, etc. 
>>
>> Thanks.
>>
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>>   
> 
> 
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