gnuplot

问题 The location of the grid lines (parallel to Y-axis) at X-axis are defined at third row of a files, for example the third lines has the points # 0.00000000 0.08329780 0.11683890 0.20013670 0.23367770 I can get the Ymax from another file defined as FILE with set table $Dummy plot FILE u ($0==1?(Ymax=$2): NaN) w table # i have updated this line. This will be used only for height of the grid line. Here FILE is a data file with two coloum only which will be plotted in X-Y format. unset table How I

问题 The location of the grid lines (parallel to Y-axis) at X-axis are defined at third row of a files, for example the third lines has the points # 0.00000000 0.08329780 0.11683890 0.20013670 0.23367770 I can get the Ymax from another file defined as FILE with set table $Dummy plot FILE u ($0==1?(Ymax=$2): NaN) w table # i have updated this line. This will be used only for height of the grid line. Here FILE is a data file with two coloum only which will be plotted in X-Y format. unset table How I

问题 The location of the grid lines (parallel to Y-axis) at X-axis are defined at third row of a files, for example the third lines has the points # 0.00000000 0.08329780 0.11683890 0.20013670 0.23367770 I can get the Ymax from another file defined as FILE with set table $Dummy plot FILE u ($0==1?(Ymax=$2): NaN) w table # i have updated this line. This will be used only for height of the grid line. Here FILE is a data file with two coloum only which will be plotted in X-Y format. unset table How I

问题 I would like to plot a curve with a variable line width. I normally would do the following if I wanted to use points instead of a line: gnuplot> plot 'curve.dat' u ($1):($2):($1) ps var where curve.dat is filled with: 0 0 1 1 2 4 3 9 4 16 5 25 and so on. Now if I try something similar for the line width : gnuplot> plot 'curve.dat' u ($1):($2):($1) lw var I get the error message: undefined variable: var Or is this something that cannot be done with gnuplot? 回答1: You're right that linewidth

问题 I have a datafile that has three columns : 1 1.0 1 2 1.5 2 3 0.0 3 4 1.2 2.5 5 1.0 1 6 1.1 5 where the first column is my X value, the second column is my Y value, and the third column is the line width. I'd like for each line segment to be plotted according to the third column line width. I tried: plot 'file1.dat' using 1:2:3 with lines lw var But I get undefined variable: var error. Is this possible in gnuplot? Thanks. 回答1: If you define column 3 as the linewidth between points n and n+1

问题 I have a datafile that has three columns : 1 1.0 1 2 1.5 2 3 0.0 3 4 1.2 2.5 5 1.0 1 6 1.1 5 where the first column is my X value, the second column is my Y value, and the third column is the line width. I'd like for each line segment to be plotted according to the third column line width. I tried: plot 'file1.dat' using 1:2:3 with lines lw var But I get undefined variable: var error. Is this possible in gnuplot? Thanks. 回答1: If you define column 3 as the linewidth between points n and n+1

问题 I am using Gnuplot to successfully plot some time series data. However, the series are fairly dense (10,000's of samples in about 5 inches of space), and when I plot multiple series, it is hard to see underneath the series that was plotted on top. Is there any way to make the lines have a bit of opacity or transparency (i.e. make the line transparent so underneath lines are visible)? Excel has this capability, but I would much prefer to use Gnuplot. Below is a sample of what I'm talking about

问题 Is there a way to plot transparent data points when using palette? I currently have the following code: set style fill transparent solid 0.2 noborder set palette rgb 22,13,-22 plot 'mydata.dat' u 1:2:3 ps 0.3 palette My feeling is that transparency is overwritten by the arguments of the plot command. 回答1: Is there a way to plot transparent data points when using palette? If you check help palette you will not find (or I overlooked) a statement about transparency in the palette. It looks like

问题 What is the reason that lw 0 doesn't have zero linewidth, i.e. invisible? What I find in the gnuplot manual: The line width and point size are multipliers for the current terminal's default width ... Ok, if lw 0 is a multiplier then the resulting linewidth should be zero independent of the terminal's default linewidth. The reason for asking is to eventually have the possibility to use with linespoints and programmatically switch within a loop between with lines and with points . Code: ###

问题 I have some issue with negative times in gnuplot. Basically, I would like to write a negative time, e.g. as -00:01:00 , but gnuplot is not interpreting it as -60 seconds, but as +60 seconds. I can somehow understand why: because -00 hours is equal to +00 hours and then 01 minutes are counted positive. Did I overlook something? Is there maybe an easy workaround? More examples are given below. Let's convert some times in the format %H:%M:%S (actually %tH:%tM:%tS ). I'm fine with all lines,