I want to plot two charts (reading the same data points) using multiplot. The purpose is to put the second (smaller) chart in the right of the first (bigger) chart.
The code is
set term post eps enhanced color blacktext size 4,4 solid "Times-Roman" 14
set output 'cla.ps'
set multiplot
# draw bottom and left lines
unset border
unset xtics
unset ytics
set border 3
# increasing the canvas size
set rmargin 50
set tmargin 2
# put the big chart, it will not use the whole space
set origin 0,0
set size 1.2,0.5
plot 'test.txt' u 1 with points lc rgb "black"
# put the small char in the right
set origin 0.6,0.2
set size 0.2,0.2
plot 'test.txt' u 1 with points lc rgb "black"
# always unset multiplot
unset multiplot
Problem is, the second chart is shown in a mirror fashion (horizontal flip). But I didn't such an option. How can I fix that?
That should give you a nice warning explaining that: warning: Terminal canvas area too small to hold plot. Check plot boundary and font sizes.
With set rmargin 50 you set the right margin to be 50 character widths. That applies also to the second plot unless you use e.g. set rmargin -1 to reset it to automatic calculation.
But I don't see any sense to set both the size and the rmargin. Setting the rmargin does not increase the canvas size, like you suggest in your comments.
Here is a working example:
set term post eps enhanced color blacktext size 4,2 solid "Times-Roman" 14
set output 'cla.ps'
set multiplot
# draw bottom and left lines
unset tics
set border 3
# put the big chart, it will not use the whole space
set origin 0,0
set size 0.8,1
plot x**2
# put the small char in the right
set origin 0.75,0.2
set size 0.25,0.3
plot x
# always unset multiplot
unset multiplot
That gives you the output (tested with 4.6.5):
Related
I am using multiplot to plot four graphs. My code is given below
set term postscript eps enhanced color
set pm3d map
set pm3d corners2color c1
set size square
set out 'defect2.eps'
unset colorbox
set colorbox horiz user origin 0.1,0.7 size 0.8,0.02
set cbrange [-1.6:0]
set xtics 25
set ytics 25
set lmargin at screen 0.1
set rmargin at screen 0.9
set multiplot layout 1,4
set xlabel "i" font "Times-italic,20"
set ylabel "j" font "Times-italic,20"
spl 'defect.dat' notitle
unset ylabel
spl 'defect_2.dat' notitle
spl 'defect_3.dat' notitle
spl 'defect_4.dat' notitle
unset multiplot
set out
This produces a following plot
However, individual plots in the picture are not properly placed. I cannot see ylabel for the first plot as it is hidden behind the screen whereas there are large blank gaps between those plots. Is there any way to reduce these gaps, increase size of these plots and show the labels properly?
Thanks in advance.
The Problem is your margin setting. The margin defines the size of the white stripe between the box containing the plot and the border of the window.
This means, tic and axis labels are printet on the Martin area! And your 10% of window width is not enough, so the labels are clipped.
So you can adjust the margins to shift all plots more to the left or adjust label font sites and offsets (Miguel's comment).
I am generating a multiplot with 2 rows and 2 columns. I am using pm3d map for individual graphs. The generated picture is shown below:
In this picture, each individual graph has its own colorbox and axes labels. I would like to have common colorbox for all these graphs and would like to give common i and j indices after drawing common x and y axes. How can I do this? Thanks in advance.
As Christoph mentioned, this can be done with set/unset colorbox. In your case, I highly recommend that you plot ... with image rather than use set pm3d map. But it can be done both ways, see Christoph's comment below.
What you need is something along these lines (change the details to accommodate it to your needs):
set multiplot
# Set left and right margins for both plots:
set lmargin screen 0.1 ; set rmargin screen 0.8
# Set ranges and *in this case* isosamples to make the graph look better
set xrange [-1:1] ; set yrange [-1:1] ; set isosamples 100
# Options for the first graph: set top and bottom margins and unset colorbox
set tmargin screen 0.9 ; set bmargin screen 0.6 ; unset colorbox
# Plot it
plot "++" u ($1):($2):(sin($1*$2)) with image
# Options for second graph
set tmargin screen 0.4 ; set bmargin screen 0.1
# Set colorbox with customize options
set colorbox user origin 0.85,0.1 size 0.05,0.8
# Plot it
plot "++" u ($1):($2):(cos($1*$2)) with image
Voilà:
I use gnu plot to draw a multiplot and in my script I set the y label like that:
set ylabel "foobar"
Now every plot in the multiplot has a dedicated y label on their y axis. However, I would like to have only one y label for all the plots in the multiplot and center that label also on the common y axis. How can I do that? The multiplot layout I use is a 7.1 So all the plots have the same y axis.
The simplest way is to make the first plot, then turn off the y label:
set ylabel 'foo'
set multiplot
plot 'data1.dat'
unset ylabel
plot 'data2.dat'
plot ...
unset multiplot
This will make the x-dimension of the first plot different from that of all the other plots, so you may have to play with the margins if you want all the plots the exact same size.
Plot the individual panels of reduced size without labels but with border, tics and title, then define a full-sized panel with labels but without border, tics and title.You may have to plot a dummy function (1/0).
Global label workaround
This is not ideal, but if you desperate like me, you can use a rotated global label + larger left margins:
#!/usr/bin/env gnuplot
label_label_size = 14
set terminal png
set output "gnuplot.png"
set multiplot layout 2,1 title "Multiplot with one ylabel" font ",18"
set lmargin 10
set label "My y-label" at screen 0.05,0.5 center front rotate \
font "," . label_label_size
plot sin(x)
set xlabel 'My x-label' font "," . label_label_size
plot cos(x)
Here is a realistic application that motivated me to do this: Heap vs Binary Search Tree (BST)
Tested in gnuplot 5.2 patchlevel 6, Ubuntu 19.04.
This is basically the suggestion from Fabian Claremont's answer, but (for beginners) put into code and visualized. Actually, Ciro Santilli's solution is even shorter.
Tested with gnuplot 5.2. For gnuplot 4.6 (the time of OP's question), replace reset session with reset and set margin 8,-1,1-1 with set lmargin 8 and set bmargin 1.
Code:
### Multiplot with single y-label
reset session
unset key
set sample 500
set multiplot layout 7,1
unset ylabel
set linetype 1 lc rgb "red"
set margins 8,-1,1,-1 # left, right, bottom, top (-1=auto)
set ytic 1.0
set title "Plot 1" offset 0,-1
plot sin(1*x)
set title "Plot 2" offset 0,-1
plot sin(2*x)
set title "Plot 3" offset 0,-1
plot sin(3*x)
set title "Plot 4" offset 0,-1
plot sin(4*x)
set title "Plot 5" offset 0,-1
plot sin(5*x)
set title "Plot 6" offset 0,-1
plot sin(6*x)
set title "Plot 7" offset 0,-1
plot sin(7*x)
set lmargin -1 # automatic lmargin
unset title
set origin 0,0
set size 1,1
set border 0
unset tics
set ylabel "This is a centered y-label"
plot [][0:1] -1 # plot a dummy line out of range
unset multiplot
### end of code
Result:
I need to plot a function on a coordinate system that has its origin at the center of the screen (or somewhere near the center, but not necessarily in the center) and I need to draw axes so that they cross at the origin. Axes should have labels and tics as well, and arrows.
I have no idea how to do this efficiently, so far in my code I manually set offsets for my tics, and draw arrows manually using offsets as well. I also set offsets on the axes labels. All this is very fragile, and offsets change depending on the terminal settings.
Would someone please help me with a sample code or an explanation how to do this the right way?
Well, using _zeroaxis is the "right" way to go to get the tics and labels in: setting the _range gives you the symmetry to make 0,0 centre ... and once you know the _range, you can draw arrows on manually.
set xzeroaxis
set xtics axis
set xrange [-10:10]
set arrow 1 from -9,0 to -10,0
set arrow 2 from 9,0 to 10,0
set yzeroaxis
set ytics axis
set yrange [-1:1]
set arrow 3 from 0,-.9 to 0,-1
set arrow 4 from 0,.9 to 0,1
set border 0
plot sin(x)
Hack attack!
set term pngcairo truecolor size 300,300 font "Arial,12"
set out 'plot.png'
# x,y min/max and center
xmin = -10
xc = 0
xmax = 10
ymin = -2
yc = 0
ymax = 2
# default borders
tm = 1
bm = 1
rm = 4
lm = 4
# arrow scale factor to cover last tic
af = 1.05
set arrow from xc,yc to xmin*af,yc filled size 0.6,30
set arrow from xc,yc to xmax*af,yc filled size 0.6,30
set arrow from xc,yc to xc,ymax*af filled size 0.6,30
set arrow from xc,yc to xc,ymin*af filled size 0.6,30
set multiplot layout 2,2
## Plot 1, top left
set key top left
set xr [xmin:xc]
set yr [yc:ymax]
set tmargin tm
set bmargin 0
set rmargin 0
set lmargin lm
set border 9
unset ytics
set xtics nomirror
plot sin(x)
## Plot 2, top right
unset key
set xr [xc:xmax]
set lmargin 0
set rmargin rm
set border 3
set ytics nomirror
replot
## Plot 3, bottom left
set xr [xmin:xc]
set yr [ymin:yc]
set bmargin bm
set tmargin 0
set lmargin lm
set rmargin 0
set border 12
unset tics
replot
## Plot 4, bottom right
set xr [xc:xmax]
set lmargin 0
set rmargin rm
set border 6
set ytics nomirror
replot
unset multiplot
I get this output:
That said, you might look into the zeroaxis option. There is a demonstration here. Sadly this option doesn't draw the axis at zero, but just puts a line at that position.
I would not say my method is 'efficient,' but there is probably not too much effort to modify this for your purposes apart from changing the function/data being plotted since most of the work is done by replot commands. I don't know an option to make gnuplot put arrows at the end of axes or change where the axes are drawn natively.
In addition to Jim's answer, if required the tics and axes can be brought to the front
# bring the grid over the plot
set grid front
# remove grid if not required
unset grid
I have created a plot made up of four subplots; each subplot is a bar chart. Above the smaller bars I want to print how many units on the y-scale the bar represents. To do this I use 'set label', which works fine if I create individual files for the subplots, but not if I use multiplot. In this case the labels are successively printed on top of each other (i.e. those of the first subfigure also appear in the second, etc.).
Here is a truncated version of my gnuplot script:
set terminal postscript eps size 26cm,16cm font "Helvetica,18"
set out 'all_Figures.eps'
set multiplot
set multiplot layout 2,2
set bars fullwidth
set data style boxes
set boxwidth 0.5
set style fill solid 1.0 border -1
set border 3 front linetype -1 linewidth 1.000
set xtics border in scale 0,0.5 nomirror norotate offset character 0, 0, 0
set ytics border in scale -1,0 nomirror norotate offset character 0, 0, 0
set nogrid
set datafile separator ","
# ** First Plot **
set label "36" at first 2, 130 center
set label "86" at first 3, 160 center
set size .4,.3
plot 'allPDB_perc.csv' using 2:xticlabels(1) notitle
# ** Second Plot **
set size .4,.3
set label "10" at first 3, 236 center
set label "3" at first 4, 236 center
plot 'allPDB_num_dom.csv' using 2:xticlabels(1) notitle
unset multiplot
Is someone able to tell me how to clear the previous subfigure's data labels prior to generation of the current labels? Thanks a lot in advance!
Oh dear >_< I simply had to unset the labels after plotting, like so:
# ** Plot 1 **
set label ...
plot 'datafile.dat'
unset label
# ** Plot 2 **
set label ...