gnuplot

问题 file.data has the following values to fit with Weibull distribution, x y 2.53 0.00 0.70 0.99 0.60 2.45 0.49 5.36 0.40 9.31 0.31 18.53 0.22 30.24 0.11 42.23 Following the Weibull distribution function f(x)=1.0-exp(-lambda*x**n) , it is giving error: fit f(x) 'data.dat' via lambda, n and finally plotting f(x) and xy graph have large discrepancy. Any feedback would be highly appreciated. Thanks! 回答1: Several things: You must skip the first line (if it really is x y ). You must use the correct

问题 My data files look like this: c0e0100.dat 0.234 c0e0200.dat 0.857 ... c0e1200.dat 0.003 I would like to extract the x-values from the 4th to 7th character of the filenames in the first column. I tried the following user function: str2num(s)=(s[4:7]+0.0) and then: plot 'file' using (str2num($1)):($2) but this gives: internal error: substring range operator applied to non-STRING type I also tried: plot 'file' using (str2num(stringcolumn($1))):($2) but got the same result. Is there a way of

问题 I have plotted a surface from some data. In the same plot I want to have a 3D line (I have the [x,y,z] values for the line I want to plot). When I try to do this using plot3(x,y,z) in the same figure, the line is always below the surface. Is there any way to fix this? I don't know if this problem appears in Matlab as well. Minimal example: figure; hold all; y = x = 0:35; z = ones(1,36).*0.5; plot3(x,y,z); [X,Y] = meshgrid(-8:.5:8); R = sqrt(X.^2 + Y.^2) + eps; Z = sin(R)./R; surf(Z); The

问题 I have problems changing the font size of my ytics (xtics as well) in an epslatex gnuplot. I tried set format y '\tiny{%g}' It is only working for the first of the two plots. This is my code: set terminal epslatex set output "w_alt_nsyB_multi.tex" set multiplot layout 1,1 set xrange [-0.5:17] set yrange [0:110] set xlabel "days" set ylabel "Survival (\\%)" offset 2.5 set key reverse set xtics font 'Arial,4' s et style histogram errorbars gap 2 lw 1 set style data histogram set style fill

问题 This question/issue is maybe related somehow to this topic. If you type: print log10(1e7) you will get 7.0 . print int(log10(1e7)) you will get 7 . However, if you type print log10(1e6) you will get 6.0 . print int(log10(1e6)) you will get 5 . These are probably rounding errors related to log10 and cannot(?) be avoided. Because if you type print sprintf("%.20e",log10(1e6)) gives 5.99999999999999911182e+00 print sprintf("%.20e",log10(1e7)) gives 7.00000000000000000000e+00 You can extend and

问题 Hi I'm trying to use gnuplot-iostream, at the minute I'm just trying to get the code here working. When I try to combile I get errors in the linker saying: In function `stream<int, boost::iostreams::file_descriptor_flags>': /usr/include/boost/iostreams/stream.hpp:130: undefined reference to `boost::iostreams::file_descriptor_sink::file_descriptor_sink(int, boost::iostreams::file_descriptor_flags)' In function `boost::iostreams::file_descriptor_sink boost::iostreams::detail::wrap<boost:

问题 I'm trying to change the color of the points on my 3D Scatter Plot. The points change to black, not the color I want and the point on the key changes to the correct color. Does anyone know why this occurs? import com.panayotis.gnuplot.JavaPlot; import com.panayotis.gnuplot.plot.*; import com.panayotis.gnuplot.style.NamedPlotColor; import com.panayotis.gnuplot.style.PlotStyle; import com.panayotis.gnuplot.style.Style; public class ScatterPlot4D { public static void main(String[] args) { int

问题 I want to plot a filled circle in Gnuplot, but with transparency changing with the distance to the center of the circle, i.e. a transparency gradient (solid near to the center, and transparent near to the radius of circle). Is there any way of doing this in Gnuplot? Thank you in advance! 回答1: One option would be to define a custom function describing the gradient (e.g., a Gaussian) and then use pm3d map to visualize it: set terminal pngcairo size 400,400 set output 'fig.png' unset border

问题 This question is an extension of a previously answered one. I want a graph using gnuplot with two data in mixed scheme. This is a data consisting of 3 columns: #x y1 y2 1 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0 1 9 0.1 1.2 10 0.1 1.23 What I want is that one line draws without seam. e.g. From x=1 to x=5, use y1 value, then from x=6 to x=10 use y2 value. And, all the points are connected with one single line. Does any body know how to make it with simple gnuplot command? One more related

问题 I have a data file (d.asc) as follows: 0.1 0.5 ... 1 0.34 ... 10 9.4 ... 100 45.3 In between 0.1 and 1, 1 and 10, 10 and 100 I have 35 values. So that in total in d.asc file I have 109 lines. But I just want x-axis to display these four point values (i.e. 0.1, 1, 10, and 100). To plot it I use the following: set xtics ("0.1" 0.1, "1" 1, "10" 10, "100" 100) set grid plot "d.asc" using 1:2 notitle with lines But this gives something weird, it places 1 and 10 very close to 0.1 (kind of