그림:BesselJ plot.svg
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BesselJ_plot.svg (94KB, MIME 종류: image/svg+xml
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[edit] Summary
Plot of the Bessel functions of first kind J0(x) in red, J1(x) in green and J2(x) in blue. The plot was produced running Gnuplot on the following code:
set terminal svg set output "BesselJ_plot.svg" set title "Bessel functions of 1st kind" set xlabel "x" set ylabel "J_n(x)" set xrange [0:20] set yrange [-0.5:1] set xzeroaxis linetype -1 linewidth 0.5 set yzeroaxis linetype -1 linewidth 0.5 set xtics axis set ytics axis plot "besselJ.dat" using 1:2 title "J_0(x)" with lines linewidth 2, \ "besselJ.dat" using 1:3 title "J_1(x)" with lines linewidth 2, \ "besselJ.dat" using 1:4 title "J_2(x)" with lines linewidth 2
the file "besselJ.dat" contains the values of the Bessel functions and can be produced with the following Octave commands:
t = 0:0.01:20; J = [ t; besselj(0,t); besselj(1,t); besselj(2,t) ]; J = J'; save -ascii "besselJ.dat" J;
It was then post-processed with Inkscape; I had to modify the source manually as well using a text editor to fix the subscripts. I made this picture by myself
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