I am able to successfully reproduce Jitter examples from here: http://gnuplot.sourceforge.net/demo/violinplot.html
However, when I try to use my own data, the points are not "jittered".
Here is the data file (data.dat):
10 1 1 3 8 8 8
20 2 2 3 8 8 8
30 3 3 3 8 8 8
Here is a minimal gnuplot input file:
set jitter
plot 'data.dat' using 1:2 with points, '' u 1:3 with points, '' u 1:4 with points, '' u 1:5 with points, '' u 1:6 with points, '' u 1:7 with points
The points are right on top of each other, whereas I want points that are in the same place to be slightly offset (x-axis).
I've installed the latest version of gnuplot:
$ gnuplot --version
gnuplot 5.2 patchlevel 6
EDIT WITH SOLUTION:
#Ethan's comment cleared it up for me. I'm able to get the jittering by reorganizing my input data file so that it's a single dataset, which contains internal "collisions", rather than reading in lots of individual data sets. e.g:
10 1
10 1
10 3
10 3
20 2
20 2
30 8
30 8
And my gnuplot file is now just:
set jitter
plot 'data.dat' using 1:2 with points
"set jitter" will not work across multiple data sets as noted in the comment. You could do something similar by adding a random displacement in the 'using' specifier.
plot for [col=2:7] 'data.dat' using 1:(column(col) + (rand(0)-0.5)/2.) with points
This is different from "set jitter" because all points will be randomly displaced, whereas with jitter only overlapping points are shifted and the displacement is not random.
Alternatively, since in your case the columns are distinct perhaps you want to shift systematically based on the column number:
plot for [col=2:7] 'data.dat' using (column(1)+col/4.) : (column(col))
Related
I'm working on a temperature graph and would like to put the last data point in the title. I can use column(2) to kind of do this but I'd like to add some descriptive text as well. I'm trying the code below to concatentate some text with the data value but getting this error: line 0: f_sprintf: attempt to print numeric value with string format
plot "/tmp/data.txt" using 1:2 with lines ls 2 title sprintf('Current :%sF', column(2))
I've tried changing the sprintf modifer to %d along with various flavors of concatenation with the dot character and haven't found the right combination.
Most probably there are various solutions. The first possibility which comes to my mind (I guess requiring gnuplot >5.2) is using keyentry, check help keyentry. While plotting you are asigning column 2 to a variable. After plotting, this variable holds the last value of column 2, which you use later in keyentry, which is a keyentry without plotting anything. There would also be workarounds for older gnuplot versions.
Code:
### last value into key
reset session
$Data <<EOD
1 7.1
2 6.2
3 5.3
4 4.4
5 3.5
6 2.6
7 1.7
8 0.8
EOD
plot $Data u 1:(a=$2) w lp pt 7 lc 1 notitle, \
keyentry w lp pt 7 lc 1 ti sprintf("Last y value: %g",a)
### end of code
Result:
The problem here is that the title string is evaluated by gnuplot before the data is parsed and plot is performed.
A trick is to store the last value of temperature, and plot it afterwards.
T=0
plot "/tmp/data.txt" using 1:(T=column(2)) w l ls 2 notitle, \
1/0 w l ls 2 title sprintf('Current: %.1fF', T)
This question is an extension of a previously answered one.
I want a graph using gnuplot with two data in mixed scheme. This is a data consisting of 3 columns:
#x y1 y2
1 0 1
2 0 1
3 0 1
4 0 1
5 0 1
6 0 1
7 0 1
8 0 1
9 0.1 1.2
10 0.1 1.23
What I want is that one line draws without seam. e.g.
From x=1 to x=5, use y1 value, then from x=6 to x=10 use y2 value.
And, all the points are connected with one single line. Does any body know how to make it with simple gnuplot command?
One more related question is there. If the data in 3rd column is separated to other file, say sheme2.dat, how can i draw a same graph with pure gnuplot commands?
If you absolutely want to use pure Gnuplot you can cheat a little with variables(, but I suggest you to rethink the problem):
set term unknown
plot 'sheme.dat' u 1:2 every ::::4
x0=GPVAL_DATA_X_MAX
y0=GPVAL_DATA_Y_MAX
plot 'sheme2.dat' u 1:2 every ::5
x1=GPVAL_DATA_X_MIN
y1=GPVAL_DATA_Y_MIN
set term wxt
# or png or qt or...
set arrow 1 from x0,y0 to x1,y1 nohead lc 1
plot 'sheme.dat' u 1:2 every ::::4 w l lc 1
replot 'sheme2.dat' u 1:2 every ::5 w l lc 1
This is a tricky way to connect the last and first data points with an arrow, but the conditions of this problem are so specific.
For a file with columns 1/2 and a second file with column 3 you can use paste as well:
plot "<paste -d ' ' data1.dat data2.dat" using 1:($1<=5?$2:$3) with lines
With the -d ' ' meaning that data1.dat and data2.dat will be separated by a single space.
For three columns in one file (as answered before)
plot "data.dat" using 1:($1<=5?$2:$3) with lines
I have data for a CDF in a file which looks like the following:
0.033 0.0010718113612
0.034 0.0016077170418
0.038 0.0021436227224
... ...
... ...
0.847 0.999464094319
0.862 1.0
First column is the X-axis value and the second column is the CDF value on Y-axis. I set the line style as follows:
set style line 1 lc rgb 'blue' lt 1 lw 2 pt 7 ps 0.75 # --- blue
and subsequently plot the line with the following:
plot file1 using 1:2 title 'Test Line CDF' with linespoints ls 1
This all works fine, the problem seems to be that my CDF file is pretty big (about 250 rows) and Gnuplot would plot the marker/point (a circle in this case) for every data point. This results in a very "dense" line because of the over-concentration of markers such that the underlying line is almost not visible as I show in an example image below:
How can I selectively draw the markers so that instead of having them on all data points, I plot them after every 50 data points, without having to decrease the number of data points (which I believe is what "every n" in the plot command would do) in my data file or decrease the marker size?
There is no need to use two plots commands, just use the pointinterval option:
plot 'data' pointinterval 5 with linespoints
That plots every line segment, but only every fifth point symbol.
The big advantage is, that you can control the behaviour with set style line:
set style line 1 lc rgb 'blue' lt 1 lw 2 pt 7 ps 0.75 pi 5
plot 'data' w lp ls 1
You can plot the same function twice, once with lines only, and then with points every n points. This will draw less points without decreasing the amount of segments. I think this is what you want to achieve. For this example I have done set table "data" ; plot sin(x) to generate numerical sampling of the sin(x) function.
What you have at the moment is:
plot "data" with linespoints pt 7
which gives
Now you can do the following:
plot "data" with lines, "data" every 10 with points pt 7 lc 1
which gives what you want:
You can change the styling to meet your needs.
Although #Miguel beat me to it, but I'm also posting my solution below:
The idea is to once draw the line and then draw the points with the "every n" specifier. I changed my own Gnuplot script in the following manner. A kind of hack but works:
set style line 1 lc rgb 'blue' lt 1 lw 2 pt 7 ps 0 # --- blue
plot file1 using 1:2 title '' with linespoints ls 1, "" using 1:2 every 20 title 'Test Line CDF' with points ls 1 ps 0.75
This retains the nice curve, without quantizing it too coarsely while also keeping the points much better spaced.
I'm trying to figure out how to do fence plots in gnuplot, but I'm having a hard time understanding what's going on in the examples I find on the internet.
I have a (varying) number of data sets from different points in time in my simulation, in a datafile organized as a matrix of values1:
t1 x11 y11 // indices here indicate that (x1,y1) are a data point which
t1 x21 y21 // I'd plot on a regular 2D plot for this timestep, with the
... // additional index noting which time step the values are for.
t1 xN1 yN1
[blank line]
t2 x12 y12
t2 x22 y22
...
t2 xN2 yN2
[etc...]
tM xNM yNM
I want to plot this with one fence for each time value. I can plot do simply splot 'data.txt' and get something which is quite similar to what I want - + markers along the "top edges" of the fences, with time on x axis, x-data on y axis and y-data on z axis. However, if I add something like w lines to the splot command I just get a surface with all the data series connected.
I've tried to adapt the examples from the demo script collection (about halfway down), but they both rely on a dummy variable, and I can't figure out how to combine that with my data series. I've found some other exampels as well, but they are all quite elaborate and I don't understand what they do at all.
What is a good way to create fence plots from data using gnuplot?
1 If it's necessary, it is possible to change this - I am in control of the code that generates the data. It's a hassle, though...
This does require a bit of a change to the data unfortunately. The change is pretty minor though and could probably be handled with a simple awk1,2 script:
Here's a copy/paste of my interactive gnuplot session:
gnuplot> !cat test.dat
1 2 3
1 2 0
1 3 4
1 3 0
1 4 5
1 4 0
2 2 3
2 2 0
2 3 4
2 3 0
2 4 5
2 4 0
3 2 3
3 2 0
3 3 4
3 3 0
3 4 5
3 4 0
!
gnuplot> splot 'test.dat' u 1:2:3 w lines
The thing to note here is that there are 2 blank lines between "fences" and each x,y data point appears twice with a blank line afterward. The second time it appears, the z-coordinate is 0.
To get each fence to have a different color:
gnuplot> splot for [i=0:3] 'test.dat' index i u 1:2:3 w lines
The awk script can even be done inline:
splot "< awk {...} datafile"
But that can get a little tricky with quoting (to include a single quote in a single quoted string, you double it) ...
AWKCMD='awk ''{if(!NF){print ""}else if(index($0,"#")!=1){printf "%s %s %s\n%s %s 0\n\n", $1,$2,$3,$1,$2}}'' '
splot '<'.AWKCMD.'datafile.dat' u 1:2:3 w lines
As far as efficiency is concerned, I'm believe that the iteration I used above will call the awk command for each time it iterates. The workaround here is to pull the color from the index number:
splot '<'.AWKCMD.' test.dat' u 1:2:3:(column(-2)) w l lc variable
I believe that this will only do the awk command once as desired so with only a million entries it should still respond relatively quickly.
1awk '{if(!NF){print ""}else{printf "%s %s %s\n%s %s 0\n\n", $1,$2,$3,$1,$2}}' test.dat
2awk '{if(!NF){print ""}else if(index($0,"#")!=1){printf "%s %s %s\n%s %s 0\n\n", $1,$2,$3,$1,$2}}' test.dat (version which ignores comments)
I have the following dat file, named ls.dat:
# Gnuplot script file for "ls"
# Version Removed Added Modified
8.1 0 0 0
8.4 0 0 4
8.5 2 5 9
8.6 2 7 51
8.7 2 7 51
8.8 2 7 51
8.9 2 7 51
8.10 2 7 51
8.11 2 8 112
8.12 2 8 112
8.13 2 17 175
8.17 6 33 213
I am trying to plot with this:
plot "ls.dat" using 1:2 title 'Removed' with lines,\
"ls.dat" using 1:3 title 'Added' with lines,\
"ls.dat" using 1:4 title 'Modified' with lines
This produces the following graph:
What I am expecting is three line plots which should all go up, but at different rates. Can anyone see what is going on here? I'm sure it must be something very silly.
I think your problem is your version numbers. Try making 8.1 --> 8.01, and so forth. That should put the points in the right order.
Alternatively, you could plot using X, where X is the column number you want, instead of using 1:X. That will plot those values on the y axis and integers on the x axis. Try:
plot "ls.dat" using 2 title 'Removed' with lines, \
"ls.dat" using 3 title 'Added' with lines, \
"ls.dat" using 4 title 'Modified' with lines
andyras is completely correct. One minor addition, try this (for example)
plot 'ls.dat' using 4:xtic(1)
This will keep your datafile in the correct order, but also preserve your version tic labels on the x-axis.
In addition to the answers above the command below will also work. I post it because it makes more sense to me. In each case it is 'using x-value-column: y-value-column'
plot 'ls.dat' using 1:2, 'ls.dat' using 1:3, 'ls.dat' using 1:4
note that the command above assumes that you have a file named ls.dat with tab separated columns of data where column 1 is x, column 2 is y1, column 3 is y2 and column 4 is y3.
Edit for .csv file types....
Note if you have a .csv file then if you use the gnuplot command
set datafile separator comma
you can then use the plot command above for data files where the numbers are separated by commas.
Whatever your separator is in your ls.dat, you can specify it to gnuplot:
set datafile separator "\t"