The title keyword within the plot command specifies the text to be displayed in the legend. You can also set it directly to one point as we have done it here in order to have enough space between the key and the tics. In addition to that, its position can be specified by set key top left etc. Generally the legend is enabled by the set key command. P(x) title 'Theory' with lines linestyle 1 Title 'Power' with yerrorbars linestyle 2, \ In the last plot we will add theoretical data and a legend to the graph: Plot 'battery.dat' using 1:($2*1000):($4*1000) with yerrorbars linestyle 1įor achieving this we have to set brackets around the expression and reference the column data with $column_number. We can avoid the set format command in the last plot by directly manipulating the input data:
![gnuplot point color gnuplot point color](http://1.bp.blogspot.com/-CsJ8fCf7PYI/TmsEiHkNHzI/AAAAAAAAAE0/2zeNIDQEL-M/w1200-h630-p-k-no-nu/gradient_colored_curve3.png)
GNUPLOT POINT COLOR CODE
4 Plot of the data from battery.dat with y errors ( code to produce this figure) Therefore we add a second line to the plot command to combine the points with a line. Using the yerrorbars plotting style it is not possible to combine the points by a line. Since we want to plot the y errors and the data we need three columns in the first line of the plot command. unset key set xrange 0.6:3.4 set yrange 0:3 Square set style line 1 linecolor rgb '000000' pointtype 5 pointsize 3 set style line 2 linecolor rgb '. The first time with black shapes and the second time with slightly smaller shapes of the colour you want.
![gnuplot point color gnuplot point color](https://i.stack.imgur.com/Ys7Lw.png)
Then in the plot command using tells gnuplot which columns from the data file it should use. As a workaround, you could plot the points twice. Therefore we set the format option to tell gnuplot to use “mantissa to base of current logscale”, see gnuplot’s documentation. The power values are stored in Watt in the data file, but only has values lower than 1. Plot 'battery.dat' using 1:2:4 with yerrorbars linestyle 1, \ Here we want not only to plot the data, but also show the error for the y value (the data is stored in the format: x, y, xerror, yerror). Therefore we use the battery.dat file from gnuplots demo files that contains data about the dependence of the power of the battery on the resistance. 3 Plot of the data from plotting_data3.dat in two different styles ( code to produce this figure)Īnother common task is to plot data with errorbars. Using the same data as in the first plot of the gnuplot basics tutorial Plotting data we will get Fig. Plot 'plotting_data1.dat' with linespoints ls 1 Now we can plot our data with the linespoints style. We specify a point interval pi of -1 and a point size of 1.5, in addition we set the the gap to a point size of 3. Set style line 1 lc rgb '#0060ad' lt 1 lw 2 pt 7 pi -1 ps 1.5 The size of the gap can be set by the pointintervalbox property. But if we use the value -1 it tells Gnuplot to insert a little gap between the points and the line. This property plots not every single point, but only every second for a value of 2 and so on. there exists the property pointinterval (see the documentation) in combination with the plotting style linespoints. But with a little trick it is very easy to achieve.
![gnuplot point color gnuplot point color](http://www.gnuplot.info/demo_cvs/voxel.2.png)
In Gnuplot exists no line style that can do this directly. 1 Plot of the data from plotting_data1.dat with non-coninuous lines between its points ( code to produce this figure)