I would like to add a horizontal line in my histogram in gnuplot, is that possible?
My histogram has on the x axis: alea1 alea 2 alea3 nalea1 nalea 2 nalea 3
and the y axis goes from 0 to 25.
At 22, I want to add a horizontal line that goes all the way across from one end to the other end of the histogram.
Try adding
, 22 title ""
at the end of your plot command. Works for my test data (file "histo"):
# Year Red Green Blue
1990 33 45 18
1991 35 42 19
1992 34 44 14
1993 37 43 25
1994 47 15 30
1995 41 14 32
1996 42 20 35
1997 39 21 31
plot "histo" u 2 t "Red" w histograms, "" u 3 t "Green" w histograms, "" u 4 t "Blue" w histograms, 22 title ""
(taken from Philip K. Janert, Gnuplot in Action)
The typical way to add horizontal and/or vertical lines is with an arrow
set arrow from x1,y1 to x2,y2 nohead linestyle ...
For a horizontal line, y1 and y2 will be the same. From your question, I'm a little unsure what you mean by "at 22", but I'm guessing you mean that you want to plot the line y=22 on top of your histogram. If that's the case, try this (before your plot command).
set arrow from graph 0,first 22 to graph 1,first 22 nohead lc rgb "#000000" front
Related
I was working on excel and drew two histograms shown below, I have been told to redraw them using gnuplot on windows which is very new to me.
The original graph that I want to redraw is this.
Area 1 Area 2
Case 1 Case 2 Case 1 Case 2
Parameter 1 36 66 31 72
Parameter 2 57 91 44 85
Parameter 3 62 90 50 85
My file is a text file and I wrote the above table as follows as I am not sure how to group the different columns together.
Area Area1 Area1 Area2 Area2
Case Case1 Case2 Case1 Case2
Parameter_1 36 66 31 72
Parameter_2 57 91 44 85
Parameter_3 62 90 50 85
I used the following commands and got a histogram that is grouped in the wrong way.
clear
reset
unset key
set style data histogram
set style fill solid border
set style histogram clustered
plot for [COL=2:5] 'date_mins.tsv' using COL:xticlabels(1) title columnheader
Kindly guide me on how to group columns together and also how to add the numbers on top of the bars. {The graph should be same as the one excel generated one.}
To be honest I'm regularly puzzled with histograms in gnuplot, apparently I'm not the only one. In gnuplot console, check help histograms.
Although, there are a few histogram examples on the gnuplot homepage, but of course not all possible variations can be covered.
Apparently, this plotting style is a bit confusing to understand.
This would maybe explain that there are more than 800 questions on SO on histograms with gnuplot.
I'm not sure if or how you can get your desired histogram efficiently, maybe there is an easy way.
I would do it "manually" with the plotting style with boxes.
Check the example below as a starting point. There are a few strange workarounds included, e.g. getting the titles into an array in an earlier plot for later use.
Code:
### special histogram
reset session
$Data <<EOD
Area Area1 Area1 Area2 Area2
Case Case1 Case2 Case1 Case2
"Parameter 1" 36 66 31 72
"Parameter 2" 57 91 44 85
"Parameter 3" 62 90 50 85
EOD
set style fill solid noborder
set boxwidth 0.8
set key noautotitle out center bottom horizontal reverse Left samplen 1 width 2
A=2 # Areas
C=2 # Cases
P=3 # Parameters
g=1 # gap
PosX(a,c,p) = ((a-1)*C*(P+g)) + (c-1)*(P+g) + p
PosY(a,c) = column((a-1)*C+c+1)
PosXArea(a) = (PosX(a,C,P)+PosX(a-1,C,P))*0.5
PosXCase(a,c) = (PosX(a,c,P)+PosX(a,c-1,P))*0.5
myColor(p) = int(word("0x5b9bd5 0xed7d31 0xa5a5a5",int(p)))
myValue(a,c) = strcol((a-1)*C+c+1)
set grid y
set xlabel "\n\n\n" # get empty space below the plot
set format x "" # no xtic labels
set yrange[0:]
array Titles[P] # array for titles
plot for [a=1:A] for [c=1:C] $Data u (PosX(a,c,$0)):(PosY(a,c)):(myColor($0+1)) skip 2 w boxes lc rgb var , \
for [a=1:A] for [c=1:C] '' u (PosX(a,c,$0)):(PosY(a,c)):(Titles[int($0+1)]=strcol(1), myValue(a,c)) skip 2 w labels offset 0,0.7, \
for [a=1:A] for [c=1:C] '' u (PosXCase(a,c)):(0):(myValue(a,c)) every ::1::1 w labels offset 0,-1, \
for [a=1:A] '' u (PosXArea(a)):(0):('\n\n'.myValue(a,1)) every ::0::0 w labels offset 0,-1, \
for [p=1:P] keyentry w boxes lc rgb myColor(p) ti Titles[p]
### end of code
Result:
I have a file named 'data.txt':
25
76
90
100
120
135
And I want to make my plot x-axis looks like this:
0 4 8 12 16 20 24
I want to put first value from file to the plot on 4 position then next value to 8 position and so on. How can I do that?
similar questions have been asked here already, however, I can't recall what the titles were...
In gnuplot, check help pseudocolumns. $0 gives you the line number of the datafile, starting from 0. So, just multiply this with 4 and you'll have your added x-values.
plot "data.txt" u ($0*4):1 w lp pt 7 lc rgb "red"
Result:
There is a style to fill the space between two functions of x.
Examples of such plots can be found e.g. at http://gnuplot.sourceforge.net/demo/fillbetween.html
Is there any way to make similar plot, but with flipped x and y axes?
Here is the desired shape of a curve (without rotated/mirrored labels, titles and legends, of course)...
It could be done with closed contour (like last example here http://www.gnuplot.info/demo_svg_cvs/fillcrvs.html), but this would require reshuffling the data file. Any other options?
Thank you!
You can't do this directly. From help filledcurves:
The third variant fills the area between two curves sampled at the same set of
x coordinates. It requires three columns of input data (x, y1, y2).
I don't think you can specify (y, x1, x2) directly. As a workaround you can the area between the y axis and the larger function in some color, and then fill the area between the y axis and the smaller function in white:
x1(y) = cos(y)+1
x2(y) = cos(y)+2
xmax(y) = (x1(y) > x2(y) ? x1(y) : x2(y))
xmin(y) = (x1(y) < x2(y) ? x1(y) : x2(y))
plot '+' using (xmax($1)):1 with filledcurve y1, \
'+' using (xmin($1)):1 with filledcurve y1 fillcolor rgb "white"
This probably has to be tweaked a little if one or both of the two functions can be negative.
With gnuplot >=5.2 it could be tweaked even further because it allows arrays.
The following code shows a workaround how filled curves between vertically oriented curves can be realized. You can even use transparency. If you download the attached PNG you will notice that it actually has a transparent background. The basic idea behind this workaround is to make closed areas and fill them. For this, you need to reverse one border, concatenate the borders and plot them filled. Unfortunately, gnuplot has no function to reverse datapoints in a column, so you have to do it in a special procedure yourself.
The code:
### "Vertical" filledcurves
reset session
# create some dummy data
N = 50
set samples N
set xrange [-5:5]
set table $Data
plot '+' u (sin($1)):1:(rand(0)*0.3+1) with table
unset table
# put Borders into arrays
stats $Data nooutput
RowCount = STATS_records
array BorderX1[RowCount]
array BorderX2[RowCount]
array BorderY[RowCount]
set table $Dummy
plot $Data u (BorderX1[$0+1]=$1-$3):(BorderX2[$0+1]=$1+$3):(BorderY[$0+1]=$2) with table
unset table
# reverse BorderX2 and merge borders
set samples RowCount
set table $Border
plot '+' u (BorderX1[$0+1]):(BorderY[$0+1]) with table
plot '+' u (BorderX2[RowCount-$0]):(BorderY[RowCount-$0]) with table
unset table
# make the plot
set object 1 rect at 0,-3 size 10,0.5 fs solid 1.0 fc rgb "black" back
set yrange[-5:5]
plot \
$Border u 1:2 w filledcurves fc rgb "#AA00FF00" not,\
$Border u ($1*1.5):2 w filledcurves fc rgb "#AAFFFF00" not,\
$Data u ($1+2.5):2 w filledcurves y2 fc rgb "brown" not,\
$Data u 1:2 w l lw 8 lc rgb "blue" not,\
'+' u 1:(cos($1)-0.5):(cos($1)+0.5) w filledcurves lc rgb "grey" not,\
'+' u 1:(cos($1)):(1) w l lw 3 dt 2 lc rgb "white" not
### end of code
The result:
Update: These are two alternative and simpler approaches compared to my first answer. One of them works even with gnuplot 5.0.
The plotting style filledcurves (so far) can only fill between two y-curves with identical x-values. However, gnuplot can fill closed curves. So, make the curve closed. Like in my first answer, you can do this if you reverse one curve and add it to the other one.
The assumption for both scripts is that the data has a common y-column, i.e. is organized in 3 columns, e.g. here: y x1 x2
Data: SO50676753.dat (same as OP's data, from silver.dat in the gnuplot demo directory)
# y x1 x2
10 280 16.7332
20 191 13.8203
30 152 12.3288
40 150 12.2474
50 104 10.1980
60 77 8.7750
70 69 8.3066
80 60 7.7460
90 60 7.7460
100 51 7.1414
110 41 6.4031
120 34 5.8310
130 35 5.9161
140 34 5.8310
150 24 4.8990
160 24 4.8990
170 19 4.3589
180 21 4.5826
190 20 4.4721
200 18 4.2426
210 21 4.5826
220 15 3.8730
230 19 4.3589
240 12 3.4641
250 20 4.4721
260 20 4.4721
270 18 4.2426
280 18 4.2426
290 20 4.4721
300 12 3.4641
310 26 5.0990
320 17 4.1231
330 8 2.8284
340 6 2.4495
350 8 2.8284
360 10 3.1623
370 20 4.4721
380 14 3.7417
390 8 2.8284
400 10 3.1623
410 9 3.0000
420 8 2.8284
430 10 3.1623
440 13 3.6056
450 9 3.0000
460 5 2.2361
470 7 2.6458
480 11 3.3166
500 7 2.6458
510 9 3.0000
520 12 3.4641
530 4 2.0000
540 7 2.6458
550 10 3.1623
560 9 3.0000
580 8 2.8284
590 9 3.0000
600 5 2.2361
Script 1: (works with gnuplot>=5.0.0)
Here you assume that you have monotonic and unique y-values. With this you can use the option smooth unique (available at least in gnuplot 4.x versions) to reverse one curve. However, since this solution here uses datablocks and plotting style with table it requires at least gnuplot 5.0.0. Maybe with some workarounds and temporary files you can also get it to work with some 4.6 versions.
### fill between vertical curves
reset session
FILE = "SO50676753.dat"
set table $Temp
plot FILE u 1:2
plot FILE u (-$1):3 smooth unique
set table $Data
plot $Temp u 2:1 index 0 w table, \
'' u 2:(-$1) index 1 w table
unset table
set style fill solid 0.3
set grid x,y
plot $Data u 1:2 w filledcurves
### end of script
Script 2: (works with gnuplot>=5.2.0)
With this solution there are no special assumptions about the data, but since it uses indexing of datablocks it requires gnuplot>=5.2.0.
### fill between vertical curves
reset session
FILE = "SO50676753.dat"
set table $Temp1
plot FILE u 2:1 w table
set table $Temp2
plot FILE u 3:1 w table
unset table
set print $Data
do for [i=1:|$Temp1|] { print $Temp1[i] }
do for [i=|$Temp2|:1:-1] { print $Temp2[i] } # reverse data
set print
set style fill solid 0.3
set grid x,y
plot $Data u 1:2 w filledcurves
### end of script
Result: (same for both scripts):
How set point type from data in gnuplot?
gnuplot script:
set terminal pngcairo size 640,480
set output "points.png"
set style data points
set auto x
set autoscale x
unset colorbox
plot 'test.data' using 2:1 with points notitle
test.data
32 35 8
34 34 6
36 28 1
34 32 2
28 30 7
38 30 9
34 29 2
35 36 9
39 34 3
31 33 9
28 31 6
35 30 5
33 41 4
32 37 3
how get point type from 3 column?
plot 'gnuplot.data' using 2:1 with points pt (:3) notitle // error
abstraction example:
need:
gnuplot Version 4.6 patchlevel 4
There is no option to select the point type from the data file based on a column (equivalent to linecolor variable, pointsize variable or arrowstyle variable). Basically you have two options:
Iterate over all possible point types (which you can extract with stats if this should be variable) and for each number plot only those points which match the current point type:
stats 'test.data' using 3 nooutput
unset key
set style data points
plot for [i=STATS_min:STATS_max] 'test.data' using 2:($3 == i ? $1 : 1/0) lt 1 pt i ps 2
Use the labels plotting style and a sequence of unicode point symbols from which you select using the value from the third column as index. (use e.g. http://www.shapecatcher.com or http://decodeunicode.org/en/geometric_shapes to find suitable symbols)
unset key
set encoding utf8
symbol(z) = "•✷+△♠□♣♥♦"[int(z):int(z)]
plot 'test.data' using 2:1:(symbol($3)) with labels textcolor lt 1
I want to group an histogram rowstacked in gnuplot similar to this image:
I have these 2 files where the data from the histogram comes from:
#Round-robin
Input West-Virginia ChicagoI ChicagoII California
1500 28 25 28 19
3000 30 24 25 21
4500 28 28 25 19
6000 34 25 23 18
#Min-makespan
Input West-Virginia ChicagoI ChicagoII California
1500 34 20 30 17
3000 33 30 21 16
4500 31 23 38 9
6000 42 21 38 0
plot for [i=2:5] 'cloudusage-roundrobin.dat' using i:xtic(1), \
for [i=2:5] 'cloudusage-minmakespan.dat' using i:xtic(1)
1 - My plot instruction stack both histograms, instead of having them side-by-side. How I put them side-by-side, and also with the 2 xx labels ?
You must use newhistogram to start a new histogram. In order to use the same linetype, you must give the second call to newhistogram the option lt 1:
reset
set style data histogram
set style histogram rowstacked title offset 0,-1
set bmargin 4
set boxwidth 0.9
set style fill solid border lt -1
set key autotitle columnheader horizontal
plot newhistogram 'Cluster 1', \
for [i=2:5] 'cloudusage-roundrobin.dat' using i:xtic(1),\
newhistogram 'Cluster 2' lt 1, \
for [i=2:5] 'cloudusage-minmakespan.dat' using i:xtic(1) notitle
Result with 4.6.4: