![gnuplot set key gnuplot set key](https://i.stack.imgur.com/Lgkoo.png)
This week I wondered how far I could get with the venerable gnuplot, a command-line plotter that's probably older (32 years) than some of the people reading this post. Five years ago I wrote in an online magazine about using quickplot for this purpose. Sometimes all I need is a map plotter that puts colored markers with reasonable accuracy on a simple basemap. Because I manage my millipede data in a terminal, I often wonder whether I could do simple species mapping from the command line, as well. The GIS I use ( QGIS) and Google Earth are both large, complex GUI applications. It was archived in Zenodo as described here. The Millipedes of Australia website is no longer online. With these you can map the species locations in GIS or in a spatial browser like Google Earth.
#Gnuplot set key download
From there you can download KML files or TSV tables of species occurrence records. I record their locations and make these publicly available on the Millipedes of Australia website. I live in Tasmania, Australia and study the native Tasmanian millipede species.
#Gnuplot set key full
If you want to play with this, here is the file cite-data referred to in the gnuplot script.For a full list of BASHing data blog posts, see the index page. The calculations such as $0+0.5-1.5*bw specify the centre of the point at which the bar appears, and the (bw) the width. In the plot command, the $0 specifies the ordinate for each point, since I don't provide x-value points in the cite-data file. The bw=0.15 sets up a variable to store this. I decided to make each one take up a fraction of 0.15 the width of the space available for each data point. You can specify the border to be a different colour from the fill, as indicated. If you don't set this, you'll just have box outlines, so if that's what you want, don't have this line. The set style fill line is needed to fill in the bars. I set up the data file to have no abscissa column, so it will be plotting it just by the ordinal number, and a little playing with the offset enabled me to get the numbers in the right place. I used the set tics command to define user tick marks. Line styles 11 and 12 are used to set the border and grid to be grey rather than black, to accentuate the actual data. The next block sets up the border, tick marks and labels and the grid. I'm not sure which I prefer, but this at least shows how you can change them. If you follow the link to the blog post from my other blog that I mentioned above, you'll see that I didn't have those colour-changing lines, and used the default colours instead. The block of "set style line" commands is used just to set the colour of the filling of the bars in the bar chart. I used the pngcairo terminal, in the belief that it is better than the png terminal, but I should really investigate that. Set style fill solid 1.0 border rgb 'gre圓0' Set style line 12 lc rgb '#808080' lt 0 lw 1
#Gnuplot set key code
The figure is above, and the necessary code follows, with commentary below: I pass my thanks to the gnuplotting blog for some useful tips to help me get started, and the nice idea that having less prominent grids and tick labels makes things easier to read.
#Gnuplot set key how to
I needed to look up enough of the details of how to do it in gnuplot, that I thought I'd document it here for my own use, and in the hope that others may get some help from it. I wanted to make a bar chart for a recent post on my real blog (on the difference between different citation databases for my recent papers). The fourth specifier (3) tells gnuplot to colour things by the angle - in this case, the y-axis variable. Column 4 and 6 contain the data points and the calculations. Columns 1 and 3 contain the energy and angle respectively. In this case, all the data is in data.dat. "data.dat" u 1:3:4:3 w l lw 2 palette notitle Splot "data.dat" u 1:3:6:3 w p ps 1 palette notitle,\ Set zlabel "Cross section (mb)" rotate by 90
![gnuplot set key gnuplot set key](http://www.gnuplot.info/demo_4.6/world.2.png)
Set ylabel "Angle (degrees)" offset 0,-1,0
![gnuplot set key gnuplot set key](https://i.stack.imgur.com/ywIQZ.png)
Set terminal png enhanced size 800,600 font "sans, 16" Adding the palette option to the splot command will colour by a fourth variable that is appended to the column specification. The tip here is to colour the points and calculations to help depth perception. Even interactively rotating the plot doesn't help much when the point density is this high. You can't easily distinguish both the x and y coordinates of each point. In this case, the agreement between the curve and the points isn't fantastic, but it simply isn't clear which point should be compared to which line.