how could I plot x axis (graph withnout y axis) with various color lines connectig intervals?
For example:
First line I want to go from point (1,8) to (6,8) - first color
The second: from (12,8) to (40,8) - second color
The third: form (50,8) to (56,8) and (60,8) to (74,8) - third color
I tried this as sorce file
56278.5545, 52676,5737
56300.5016, 55833,2969
and commands
plot 'pokryti.txt' using 1:0 with lines, '' using 2:0 with lines
but there is not constant for y value.
Or I tried to add trird column with sames values and
plot 'pokryti.txt' using 1:3 with lines, '' using 2:3 with lines
but nothing was plotted.
Thank you very much.
Related
I'm plotting an animated surface in gnuplot and want to read in an average or sum of the mapped z values and include this in a label to be printed in the plot, so that I get a running total updated as the GIF progresses. It's probably straightforward, but I'm a "gnu"bie, so to speak, and find this system pretty confusing!
I've tried putting the running sum and average numbers in additional columns ...
splot 'output3.dat' index i:i using 1:2:(column(3), TD1 = strcol(4), TD2 = strcol(5)) with pm3d
but this doesn't plot, and the string variables TD1, TD2 don't seem to exist outside the splot command.
The command you show would indeed set variables TD1 and TD2 globally if you change the order of clauses in the serial evaluation expression (the comma-separated sub-expressions):
splot 'output3.dat' index i:i using 1:2:(TD1 = strcol(4), TD2 = strcol(5), column(3)) with pm3d
However, if the idea is to create a label using set label that will appear as part of the resulting graph, this won't work. The set label command would have to be executed before the splot command, so TD1 and TD2 will not have the correct values yet.
There is an alternative that might serve you better. Instead of trying to put this dynamically evaluate information in a label, put it in the plot title. Unlike a label, the plot title is evaluated after the corresponding plot is generated, so any variables set or updated by that plot will be current. [caveat: this is true for current gnuplot (version 5.4) but was not always true. If you have an older gnuplot version the title is evaluated before the plot rather than after].
Since current gnuplot also allows you to place the individual plot titles somewhere other than in the key proper, you have the same freedom that you would with a label to position the text anywhere on the output page. For example, if you want to sum the values in column 3 of the data file and print the total as part of a title above the resulting plot:
SUM = 0
splot 'foo.dat' using 1:2:(SUM = SUM+column(3), column(3)) with linespoints title 'foo.dat', \
keyentry title = sprintf("Points sum to %g", SUM) at screen 0.5 0.9
I used a separate keyentry clause because this allows to omit the sample line segment that would otherwise be generated, but it would also be possible to make this the title of the plot itself if you want that sample line.
I have a binary files that have binary format='%float32%float32%float32', having D3 points (using 1:2:3). Originally logically points grouped by 3 to form triangles. I want to plot just legs of triangles as a lines using with lines. In ASCII data file I can make so-called datablocks by adding an empty line between triples of lines, but in binary I can't. I want to break a chain of lines at every three points to form at least V-like parts of triangle contours.
Is there an option to make gnuplot to treat a triples of points as separate datablocks?
Is there another option to splot the data as (maybe) a solid triangles?
I'm still not sure whether I'm fully on the right track.
The following code writes your binary data into a table and makes groups of 3 datapoints for a triangle, inserting an empty line and then shifted by one for the next triangle.
So, So from the points p1=f1,f2,f3; p2=f4,f5,f6; p3=f7,f8,f9; ... it creates the triangles p1p2p3p1 p2p3p4p2 p3p4p5p3 (space=empty line).
Certainly, not very (memory) efficient, but maybe this gets closer to your final goal.
Check help pm3d and help hidden3d, where you might get some additional information.
I very much hope that there is a better approach.
Code: (assuming the binary file 'myBinary.bin', not sure whether I decoded your ASCII string correctly)
# plot binary data
reset session
# put binary data into a datablock
set table $Data
plot 'myBinary.bin' u 1:2:3 binary format='%float32%float32%float32' skip=12 w table
unset table
# separate each triangle by an empty line
set print $Data2
do for [i=1:|$Data|-2] {
print $Data[i]
print $Data[i+1]
print $Data[i+2]
print $Data[i]
print "" # insert empty line
}
set print
set pm3d hidden3d
set view 40, 24
splot $Data2 u 1:2:3 w pm3d notitle
### end of code
Result:
I have a single column of data (say 100 samples):
plot 'file' using 1 with lines
But this data is segmented: 10 points, then 10 more, etc... and I'd like each block of 10 to appear in a different color. I did filter them to 10 separate files and used
plot 'file.1' with lines, 'file.2' with lines...
But then the X axis goes 0..10 instead of 0..100 and all 10 graphs are stacked. Is there a simple way to do that without having to generate fake X data ?
Depending on your detailed data format... the following is doing what I think you are asking for.
Your "fake x data" is called pseudocolumn 0, check help pseudocolumns. The color you can change with lc var, check help linecolor variable.
Code:
### variable line color
reset session
# create some test data
set print $Data
do for [i=1:100] {
print sprintf("%g", rand(0)*i)
}
set print
plot $Data u 0:1:(int($0/10)) w lp pt 7 lc var notitle
### end of code
Result:
Iam trying to plot multiple data lines with their titles in the key based on the variable which I am using as the index:
plot for [i=0:10] 'filename' index i u 2:7 w lines lw 2 t ' = '/(0.5*i)
However, it cannot seem to do this for a fractional multiple of i. Is there a way around this other than to set the title for each line separately?
sprintf should provide all the functionality needed, e.g.,
plot for [i=0:10] .... t sprintf(" = %.1f", 0.5*i)
in order to use the value of 0.5*i with 1 decimal digit...
I'm having a problem with pm3d. I have data in the format x y # # # #, and I want to add the four #'s and plot their sum versus x,y with something like this:
set pm3d map
splot 'data' 1:2:($3 + $4 + $5+ $6)
I've made sure that my data has lines wherever the first number changes, but I'm getting the error:
';' expected
after data. If I get rid of everything after data then gnuplot is able to plot, but of course the plot is not what I want.
You're missing the keyword using.
splot 'data' using 1:2:($3+$4+$5+$6)
I suppose it's an easy one to miss because in the examples it is often abbreviated u:
splot 'data' u 1:2:...