Bar graph with x-axis in gnuplot?

Question

I have this file as data.dat:

Xstep Y1 Y2 Y3 Y4
332 1.22 0.00 0.00 1.43
336 5.95 12.03 6.11 10.41
340 81.05 81.82 81.92 81.05
394 11.76 6.16 10.46 5.87
398 0.00 0.00 1.51 1.25
1036 0.03 0.00 0.00 0.00

I can plot this data as a histogram using this script, hist-v1.gplot(using set style data histogram):

set xlabel "X values"
set ylabel "Occurence"
set style data histogram
set style histogram cluster gap 1
set style fill solid border -1
set term png
set output 'hist-v1.png'
set boxwidth 0.9
# attempt to set xtics so they are positioned numerically on x axis:
set xtics ("332" 332, "336" 336, "340" 340, "394" 394, "398" 398, "1036" 1036)  
# ti col reads the first entry of the column, uses it as title name 
plot 'data.dat' using 2:xtic(1) ti col,  '' u 3 ti col, '' u 4 ti col, '' u 5 ti col

And calling:

gnuplot hist-v1.gplot && eog hist-v1.png

this image is generated: image hist-v1.png http://img202.imageshack.us/img202/3974/histv1.png

However, you may notice that the X axis does not scale numerically - it understands the values ​​of X as categories (i.e. this is a category).

I can get a more digital X axis with the following script, hist-v2.gplot(using with boxes):

set xlabel "X values"
set ylabel "Occurence"
# in this case, histogram commands have no effect
set style data histogram
set style histogram cluster gap 1
set style fill solid border -1
set term png
set output 'hist-v2.png'
set boxwidth 0.9
set xr [330:400]
# here, setting xtics makes them positioned numerically on x axis:
set xtics ("332" 332, "336" 336, "340" 340, "394" 394, "398" 398, "1036" 1036)  
# 1:2 will ONLY work with proper xr; since we have x>300; xr[0:10] generates "points y value undefined"!
plot 'data.dat' using 1:2 ti col smooth frequency with boxes, '' u 1:3 ti col smooth frequency with boxes

And calling:

gnuplot hist-v2.gplot && eog hist-v2.png

this image is generated: image hist-v2.png http://img266.imageshack.us/img266/6717/histv2.png

Unfortunately, the bars overlap here, so it’s hard to read the chart.

X hist-v2.png, "" , hist-v1.png? , " Re: x" , :

x- ,...

...

,

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Answer 1

, gnuplot , , "" / - , , .

, $ , "" (frequency with boxes style) ; hist-v2b.gplot:

set xlabel "X values"
set ylabel "Occurence"
set style fill solid border -1
set term png
set output 'hist-v2.png'
set boxwidth 0.9
set xr [330:400]
# here, setting xtics makes them positioned numerically on x axis:
set xtics ("332" 332, "336" 336, "340" 340, "394" 394, "398" 398, "1036" 1036)  
# 1:2 will ONLY work with proper xr; since we have x>300; xr[0:10] generates "points y value undefined"!
plot 'data.dat' using ($1-0.5):2 ti col smooth frequency with boxes, '' u ($1-0.25):3 ti col smooth frequency with boxes, '' u ($1+0.25):4 ti col smooth frequency with boxes, '' u ($1+0.5):5 ti col smooth frequency with boxes

:

gnuplot hist-v2b.gplot && eog hist-v2b.png

: image hist-v2b.png http://img823.imageshack.us/img823/805/histv2b.png

... , .

- script ;

plot '-' using ($1-0.5):2 ti col smooth frequency with boxes, '-' u ($1-0.25):3 ti col smooth frequency with boxes
Xstep Y1 Y2 Y3 Y4
332 1.22 0.00 0.00 1.43
336 5.95 12.03 6.11 10.41
340 81.05 81.82 81.92 81.05
394 11.76 6.16 10.46 5.87
398 0.00 0.00 1.51 1.25
1036 0.03 0.00 0.00 0.00
end
Xstep Y1 Y2 Y3 Y4
332 1.22 0.00 0.00 1.43
336 5.95 12.03 6.11 10.41
340 81.05 81.82 81.92 81.05
394 11.76 6.16 10.46 5.87
398 0.00 0.00 1.51 1.25
1036 0.03 0.00 0.00 0.00
end

... , stdin - gnuplot - do .

!

PS: , , - ; :

• Gnuplot
• Gnuplot:

Answer 2

, "". . - , !