Re: [Gnuplot-info] Histogram/Bar Plot Troubles

[arnold4life <chr...@ho...>]

Thanks, I've seen those scripts, but I want the x-axis scaled into bins. That
way I have one bar for grades that are 70-79%, 80%-89%, etc.


Mauricio Galo wrote:
> 
> Arnold et al
> 
> In the link
> "http://www.fct.unesp.br/docentes/carto/galo/web/gnuplot/gnu_exemplos5.htm"
> you will find some examples of histograns with the respective
> gnuplot script.
> 
> M. Galo
> 
>>
>> Hi all,
>>
>> I'm a novice with gnuplot and I'm trying to make a histogram or
>> bar plot
>> that looks like the following:
>> http://old.nabble.com/file/p30208070/grades.png
>>
>> but I can't for the life of me get a gnuplot script to do this.
>> I can get
>> frequency on the y-axis but I want to get a percentage, and my
>> male/female
>> columns overlap with the same color on output:
>> http://old.nabble.com/file/p30208070/grades.jpg
>>
>> The data file I'm using has one column of male percentages and
>> one of female
>> percentages. Here's my horrible script:
>>
>> set term postscript
>> set output 'grades.ps'
>>
>> bin_width = 20.0
>> set style fill solid 1.00 border -10
>> set style data boxes
>> #set style boxes cluster gap 1
>> set bmargin 10
>> set ylabel "Percentage of Students"
>> set xlabel "Grade Percentage"
>> set yrange [0.0:140.0]
>> #set xtics ("100%-125%" 100.0:125.0, "75%-99%" 75.0:99.0,
>> "50%-74%"
>> 50.0:74.0, "25%-50%" 25.0:50.0, "0%-24%" 0.0:24.0)
>> set xtics 20
>> bin_number(x) = floor(x/bin_width)
>> rounded(x) = bin_width * ( bin_number(x))
>> UNITY = 1
>> plot 'grades_distribution.data' u (rounded($1)):(UNITY) t
>> 'Male' smooth
>> frequency w boxes fs solid 5,\
>>         '' u (rounded($2)):(UNITY) t 'Female' smooth frequency
>> w boxes fs
>> solid 3
>>
>>
>> Any help is greatly appreciated, thanks!
>>
>> --
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> 
> 
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