Re: [Gnuplot-info] need help with stacked histogram

[Steve C. <sc...@ja...>]

Thanks, Thomas - this works - up to a point. The bars display as I 
wanted them to.

However, part of the point of my earlier attempt was to get the 
time-based x-axis to show recognizable times (17:30, etc.) In this 
graph, since there are so many bars so close together, the time values 
overwrite each other beneath the x-axis making an unrecognizable line of 
black mess. How would I fix this?

Also, unfortunately, the server I ultimately want to run this on runs 
RedHat EL which has not released a distro yet that includes Gnuplot 4.2, 
and so I am restricted to using 4.0 there. Over there I could ALMOST get 
what I like running using the following with the same data. This WORKS 
on 4.2, but on 4.0 the largest impulse overwrites all the others so that 
only the first impulse is seen.

set title "Database Connections"
set key below
set xdata time
set timefmt "%Y-%m-%d %H:%M"
set format x "%H:%M"
set yrange [0:*]

plot 'latest-connections.dat' using 1:7 title "other" with impulses, \
'latest-connections.dat' using 1:($6+$5+$4+$3) title "A" with impulses, \
'latest-connections.dat' using 1:($5+$4+$3) title "B" with impulses, \
'latest-connections.dat' using 1:($4+$3) title "C" with impulses, \
'latest-connections.dat' using 1:3 title "C" with impulses

Is there a way to do something like this in 4.0? Because I haven't found 
it, I am restricted to a messy and somewhat inadquate replacement using 
impulses for the whole and points for the parts, which is somewhat 
informative but I want it to stack.



Thomas Sefzick wrote:
> you mix xticlabels for histograms and x-axis timedata.
> this can not work. and, your column numbering is not
> correct.
> use following script and see if it does what you expect:
>
> reset
> set title "Database Connections"
> set key below
> set style data histogram
> set style histogram rowstacked
> set style fill solid noborder
> set boxwidth 0.75
> plot 'latest-connections.dat' using 3:xtic(2) title "A", \
> '' using 4 title "B", \
> '' using 5 title "C", \
> '' using 6 title "D", '' using ($7-($3+$4+$5+$6)) title "other"
>
>
> Steve Cohen wrote:
>   
>> All the samples tend to assume that you are working from a data file 
>> where the header row contains the labels for each piece of the stack.  
>> That is not the case in my situation.  I want to supply the labels from 
>> each stack in the script.
>>
>> My script is as follows:
>>
>> #set terminal png transparent nocrop enhanced size 900 600
>> #set output 'latest-connections.png'
>> set title "Database Connections"
>> set key below
>> set xdata time
>> set timefmt "%Y-%m-%d %H:%M"
>> set format x "%H:%M"
>> set style data histogram
>> set style histogram rowstacked
>> set style fill solid noborder
>>
>> plot 'latest-connections.dat' using 1 "%Y-%m-%d %H:%M", \
>> '' using 2 title "A", \
>> '' using 3 title "B", \
>> '' using 4 title "C", \
>> '' using 5 title "D", \
>> '' using ($6-($2+$3+$4+$5)) title "other"
>> ------------------------------------------
>>
>> Data File is as follows:
>>
>> 2009-10-17 10:15 5 0 0 22 27
>> 2009-10-17 10:17 5 0 0 8 13
>> 2009-10-17 10:19 5 0 0 8 13
>> 2009-10-17 10:31 5 0 0 13 18
>> ...
>>
>> Error message is:
>>
>>  "connections2.gplot", line 17: Please use between 1 and 7 conversions, 
>> of type double (%lf)
>>
>> Not sure what this means or what I must do to correct it.
>>
>> Can someone help?
>>
>> Thanks.
>>
>>
>>
>>
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>
>