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Histogram plot
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Gurpreet Kaur
Dec 10, 2012, 11:21:10 AM12/10/12
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Hi all,
I am trying to make a histogram with 2 columns from a big text file using gnuplot, but getting errors. Please suggest.
Thanks
I am trying to make a histogram with 2 columns from a big text file using gnuplot, but getting errors. Please suggest.
Thanks
Hans-Bernhard Bröker
Dec 10, 2012, 6:18:15 PM12/10/12
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On 10.12.2012 17:21, Gurpreet Kaur wrote:
> I am trying to make a histogram with 2 columns from a big text file
> using gnuplot, but getting errors. Please suggest.
How do you suppose anybody could make a meaningful suggestion if you
> I am trying to make a histogram with 2 columns from a big text file
> using gnuplot, but getting errors. Please suggest.
don't show _any_ of the relevant facts: no commands, no input, no
output, not even the actual errors you get?
Gurpreet Kaur
Dec 10, 2012, 7:49:24 PM12/10/12
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I am a beginner in Gnuplot and used following code for drawing histogram from two columns in text file, but histogram does not show in negative Y-axis.
n=100 #number of intervals
max=16000 #max value
min=-300 #min value
width=(max-min)/n #interval width
hist(x,width)=width*floor(x/width)+width/2.0 #function used to map a value to the intervals
#set term png #output terminal and file
#set output "histogram.png"
set xrange [min:max]
set yrange [0:]
#to put an empty boundary around the
#data inside an autoscaled graph.
set offset graph 0.05,0.05,0.05,0.0
set xtics min,(max-min)/5,max
set boxwidth width*0.9
set style fill solid 0.5 #fillstyle
set tics out nomirror
set xlabel "avePot"
set ylabel "Frequency"
#count and plot
plot "ave.txt" u (hist($1,width)):(0.5) smooth freq w boxes lc rgb"red"
Thanks
scil...@gmail.com
Dec 10, 2012, 11:10:13 PM12/10/12
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> set yrange [0:]
This line explicitly sets your y-range to be from 0 to whatever. Remove it if you want gnuplot to automatically adjust y-range or change [0:] to correct interval.
This line explicitly sets your y-range to be from 0 to whatever. Remove it if you want gnuplot to automatically adjust y-range or change [0:] to correct interval.
gkaur
Dec 11, 2012, 11:53:02 AM12/11/12
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On Monday, December 10, 2012 11:10:13 PM UTC-5, scil...@gmail.com wrote:
> > set yrange [0:]
>
>
>
> This line explicitly sets your y-range to be from 0 to whatever. Remove it if you want gnuplot to automatically adjust y-range or change [0:] to correct interval.
Hi, I tried this option, but still not getting
> > set yrange [0:]
>
>
>
> This line explicitly sets your y-range to be from 0 to whatever. Remove it if you want gnuplot to automatically adjust y-range or change [0:] to correct interval.
Hans-Bernhard Bröker
Dec 11, 2012, 2:42:52 PM12/11/12
to
On 11.12.2012 01:49, Gurpreet Kaur wrote:
> On Monday, December 10, 2012 6:18:15 PM UTC-5, Hans-Bernhard Bröker
> wrote:
>> How do you suppose anybody could make a meaningful suggestion if
>> you don't show _any_ of the relevant facts: no commands, no input,
>> no output, not even the actual errors you get?
> On Monday, December 10, 2012 6:18:15 PM UTC-5, Hans-Bernhard Bröker
> wrote:
>> How do you suppose anybody could make a meaningful suggestion if
>> you don't show _any_ of the relevant facts: no commands, no input,
>> no output, not even the actual errors you get?
> I am a beginner in Gnuplot and used following code for drawing
> histogram from two columns in text file, but histogram does not show
> in negative Y-axis.
A proper histogram does not have negative values. And you promised
> histogram from two columns in text file, but histogram does not show
> in negative Y-axis.
yours wouldn't either:
> set yrange [0:]
So why do you expect the result of counting things ("smooth freq") to
turn out negative?
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