Re: [Gnuplot-info] Plot time series with different colored points

[<sfg...@gm...>]

thanks, that works!

Regards, Sven

On Sat, Dec 26 2015 at 10:22:17 PM, Ethan A Merritt wrote:
> On Saturday, 26 December 2015 08:10:21 PM sfg...@gm... wrote:
>> Hi folks,
>> 
>> I want to plot time series data where the color of a point depends on
>> the hour the data is  measured (0 to 23 hour). But I can't figure out
>> how to do this. Here is my example:
>> 
>> reset
>> set xlabel "Date"
>> set xdata time
>> set timefmt '"%Y-%m-%d %H:%M"'
>> set format x "%m-%d"
>> set xtics nomirror
>> set ylabel "Y"
>> set palette model RGB defined ( 0 'green', 23 'blue' )
>> set cbrange [0:23]
>> 
>> T(N) = tm_hour(timecolumn(N,'"%Y-%m-%d %H:%M"'))
>> 
>> plot '-' u 1:2:T(1) with linespoints axis x1y1 title 'Y' ps 2 lw 2 palette
>> "2015-12-15 Tue 07:40" 2.4  
>> "2015-12-15 Tue 21:48" 1.7  
>> "2015-12-16 Wed 08:13" 2.5  
>> "2015-12-17 Thu 08:54" 2.6  
>> "2015-12-17 Thu 21:41" 2.2  
>> "2015-12-18 Fri 08:05" 2.1  
>> "2015-12-19 Sat 10:35" 3.6  
>> "2015-12-20 Sun 11:40" 3.6  
>> "2015-12-21 Mon 09:32" 4.5  
>> EOF
>>  
>> I got "unknown type in magnitude()" error. Any hints how to resolve
>> this? Thanks, Sven
>
> There are several syntax errors there.
> I won't fix them all but here's a variant that works:
>
> H(N) = int(strcol(N)[16:*])
> plot '-' u 1:2:(H(1)) with linespoints title 'Y' ps 2 lw 2 lc palette