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Groups > comp.graphics.apps.gnuplot > #1962

Re: histogram : without using commanade "smooth freq"

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On Monday, August 12, 2013 8:10:38 AM UTC+2, Karl wrote:
> Am 12.08.2013 01:29, schrieb D.GH:
> 
> > I would like to build the histogram (without using commanade "smooth freq" of GNUPLOT) of these data with a number of intervals (n_bins) that varies.
> 
> > 
> 
> 
> 
> So you want to be able to change the bin size, so that more than one
> 
> number lands in the same bin, right?
> 
> 
> 
> Why don´t you construct a function that converts your values to bin
> 
> numbers, something like
> 
> bin(x) = int(x/bs)
> 
> 
> 
> with bs being (xmax-xmin) / bin_number,
> 
> and then
> 
> 
> 
> plot fname using (bin($1)):xticlabels($1) smooth freq
> ? (Hope the thing with the labels works, haven´t tried now.)
>   Karl


Here is my data : 'mydata.dat'

1120
1160
963 
1546
258
964
1128
1169
1007
259
179
1408
1207
1389
308
1179
147
508
1148
1308

here my code :

reset
stats 'mydata.dat'  u 1  name "XX" 

bin_number=4
bs=(XX_max-XX_min) / bin_number
bin(x) =bs*int(x/bs) 

set table 'out1.dat'
plot 'mydata.dat' using (bin($1)):(1.0) smooth freq with boxes
unset table 

the output file: 'out1.dat'

# Curve 0 of 1, 6 points
# x y xlow xhigh type
 0  5  0  0  i
 349.75  1  349.75  349.75  i
 699.5  3  699.5  699.5  i
 1049.25  9  1049.25  1049.25  i
 1399  2  1399  1399  i
 349.75  1  349.75  349.75  u   ***(I do not understand why there is this last line!)

#######
We note that the (left) end of the first interval should be the minimum 'mydata' = 147, whereas here ('out1.dat' = 0). the (right) end of the last interval should be maximum 'mydata' = 1546, whereas here ('out1.dat' = 1399).

This is why I asked if there was another way to construct the histogram of intervals.

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histogram :  without using commanade "smooth freq" "D.GH" <dariush.ghorbanzadeh@gmail.com> - 2013-08-11 16:29 -0700
  Re: histogram :  without using commanade "smooth freq" Karl <mail.kfr@gmx.net> - 2013-08-12 08:10 +0200
    Re: histogram :  without using commanade "smooth freq" "D.GH" <dariush.ghorbanzadeh@gmail.com> - 2013-08-12 15:35 -0700
      Re: histogram :  without using commanade "smooth freq" Karl <ratzsch@polymer.uka.de> - 2013-08-13 09:37 +0200
        Re: histogram :  without using commanade "smooth freq" "D.GH" <dariush.ghorbanzadeh@gmail.com> - 2013-08-13 06:45 -0700
        Re: histogram :  without using commanade "smooth freq" "D.GH" <dariush.ghorbanzadeh@gmail.com> - 2013-08-13 10:48 -0700
          Re: histogram :  without using commanade "smooth freq" Karl <mail.kfr@gmx.net> - 2013-08-14 16:27 +0200
            Re: histogram :  without using commanade "smooth freq" sfeam <sfeam@users.sourceforge.net> - 2013-08-14 08:46 -0700
              Re: histogram :  without using commanade "smooth freq" Karl <mail.kfr@gmx.net> - 2013-08-14 18:48 +0200
              Re: histogram :  without using commanade "smooth freq" Karl <mail.kfr@gmx.net> - 2013-08-14 18:54 +0200
                Re: histogram :  without using commanade "smooth freq" sfeam <sfeam@users.sourceforge.net> - 2013-08-14 18:05 -0700
                Re: histogram :  without using commanade "smooth freq" "D.GH" <dariush.ghorbanzadeh@gmail.com> - 2013-08-15 16:00 -0700
                Re: histogram :  without using commanade "smooth freq" sfeam <sfeam@users.sourceforge.net> - 2013-08-15 17:18 -0700
      Re: histogram :  without using commanade "smooth freq" Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2013-08-13 22:35 +0200

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