gnuplot

问题 I am trying to plot multiple parametric curves in gnuplot 4.6. In an earlier version (4.4?), the commands set para plot [-pi:pi] for [a=1:10] a*cos(t),a*sin(t) would result in ten circles centered at the origin with radius 1, 2, ..., 10. In 4.6, the result is one circle of radius 1. In 4.6, the commands unset para plot [-pi:pi] for [a=1:10] a*sin(x) yield ten beautiful sine curves. So, it appears that the "for" command now has a problem with parametric curve plotting, I guess. Does anyone

问题 I am trying to plot multiple parametric curves in gnuplot 4.6. In an earlier version (4.4?), the commands set para plot [-pi:pi] for [a=1:10] a*cos(t),a*sin(t) would result in ten circles centered at the origin with radius 1, 2, ..., 10. In 4.6, the result is one circle of radius 1. In 4.6, the commands unset para plot [-pi:pi] for [a=1:10] a*sin(x) yield ten beautiful sine curves. So, it appears that the "for" command now has a problem with parametric curve plotting, I guess. Does anyone

问题 How to change the vertical space between series titles. Is it possible to separate the series titles into two groups and have a gap between them, like this one: Thanks. 回答1: You can insert some kind of 'dummy' plot where you want to have the white space: set xrange [0:4] set key left plot x, \ 2*x t '2x', \ NaN title ' ' lt -3,\ 3*x t '3x',\ 4*x t '4x' The special linetype -3 doesn't draw any line at all, using linewidth 0 wouldn't work for all terminals (e.g. postscript). And the title must

问题 I have a csv file with a following format having four columns (as a MWE ): xcoord1,ycoord1,xcoord2,ycoord2 0.1,0.2,0.4,0.3 0.5,0.3,0.7,0.5 I want to plot a line from each xcoord1,ycoord1 to xcoord2,ycoord2 using gnuplot. For example in this case, I would draw two lines from 0.1,0.2 to 0.4,0.3 and 0.5,0.3 to 0.7,0.5 . How is it possible? 回答1: one solution would be to preprocess your file and generate a Gnuplot script which would employ the set arrow command. Alternatively one can plot the

问题 Fitting without errors (works) I made a simple linear fit in Gnuplot 5.0 using the command: f(x)=a*x+b fit f(x) 'file.dat' using 1:2 via a,b I get the output: degrees of freedom (FIT_NDF) : 6 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.00794747 variance of residuals (reduced chisquare) = WSSR/ndf : 6.31623e-05 Final set of parameters Asymptotic Standard Error ======================= ========================== p1 = -0.00964423 +/- 0.0004976 (5.159%) p2 = 1.07794 +/- 0.01908 (1.77%) The

问题 I have a data file with X,Y scattered data and I want to fill somehow (pattern, solid transparent, whatever) the space outside of those points. I tried with filledcurves closed but it fills the inside, not the outside Is there a way to fill the space without separating the data points into several lines and set fill above/below the axis? Thank you 回答1: Would it be an option to post process the plots with Imagemagick? Then you could produce two images, one with transparency, and combine them

问题 I am currently analysing two character combinations in texts and I want to visualize the frequencies in a heatmap using gnuplot. My input file is in the format (COUNT stands for the actual number of this combination) a a COUNT a b COUNT ... z y COUNT z z COUNT Now I'd like to create a heatmap (like the first one that is shown on this site). On the x axis as well on the y axis I'd like to display the characters from A-Z, i.e. a b ... z a b ... z I am pretty new to gnuplot, so I tried plot

问题 I am currently analysing two character combinations in texts and I want to visualize the frequencies in a heatmap using gnuplot. My input file is in the format (COUNT stands for the actual number of this combination) a a COUNT a b COUNT ... z y COUNT z z COUNT Now I'd like to create a heatmap (like the first one that is shown on this site). On the x axis as well on the y axis I'd like to display the characters from A-Z, i.e. a b ... z a b ... z I am pretty new to gnuplot, so I tried plot

问题 I want to place several plots with gnuplot in following way: +------------------------+ |plot1 | | | +------------------------+ +----------++------------+ |plot2 ||plot3 | | || | +----------++------------+ +----------++------------+ |plot4 ||plot5 | | || | +----------++------------+ Simple nxm layouts can be achieved via set multiplot layout n,m (see these demos for illustration on the official website). matplotlib offers much more advanced possibilites as you can see in the documentation:

问题 I want to place several plots with gnuplot in following way: +------------------------+ |plot1 | | | +------------------------+ +----------++------------+ |plot2 ||plot3 | | || | +----------++------------+ +----------++------------+ |plot4 ||plot5 | | || | +----------++------------+ Simple nxm layouts can be achieved via set multiplot layout n,m (see these demos for illustration on the official website). matplotlib offers much more advanced possibilites as you can see in the documentation: