我想使用 PSTricks 创建以下图表:
数据可从以下网址下载:http://gupl.dk/705644/,应该与三个图表一起绘制。我以前曾设法绘制过类似这样的数据和函数,但出于某种原因,我不知道如何绘制这个。我试图将一个psgraph
环境放在pspicture
另一个环境里面figure
,但 y 轴的缩放比例不对:
\documentclass{article}
\usepackage{pst-plot}
\begin{document}
\begin{figure}
\centering
\psset{
xAxisLabel = {$t$~(s)},
yAxisLabel = {$x$~(m)}
}
\begin{pspicture}(-0.7,0.06)(5.4,0.14)
\begin{psgraph}[
Dy = 0.01,
Oy = 0.0954
]{->}(0,0.0954)(0,0.065)(5.2,0.13){10cm}{7cm}
\readdata{\daempning}{daempning.txt}
\dataplot[
plotstyle = dots,
dotsize = 4pt,
dotstyle = o,
fillstyle = solid,
fillcolor = blue
]{\daempning}
\end{psgraph}
\end{pspicture}
\caption{D{\ae}mpede svingninger af fjeder.}
\label{fig:daempede-svingninger}
\end{figure}
\end{document}
更新
我现在已经设法绘制数据;
\documentclass{article}
\usepackage{
pst-plot,
pst-math
}
\psset{
xunit = 1.95,
yunit = 0.8,
algebraic
}
\begin{document}
\begin{figure}
% constants.
\def\bKonst{0.182323628}
\def\mKonst{0.179887}
\def\kKonst{25.04285714}
\def\omegaSHBKonst{12.1277}
\def\omegadKonst{1.026}
\def\AKonst{0.0264572}
\def\pKonst{0.095398}
% functions (something is wrong here)
\def\hFunk(#1){\AKonst*exp(-\bKonst/(2*\mKonst)*#1)}
\def\spring(#1){\hFunk(#1)*ACOS(sqrt(\kKonst/\mKonst-(\bKonst/(2*\mKonst))^2)*#1+ATAN(\bKonst/\mKonst/(\omegaSHBKonst^2-\omegadKonst^2)))+\pKonst}
% data
\readdata{\daempning}{daempning.txt}
% plot
\centering
\begin{pspicture}(-0.57,5.35)(5.65,16.9)
\pstScalePoints(1,8){1000 div}{660 sub 600 div}
\psaxes[
dx = 1,
Dx = 1.00,
xsubticks = 5,
dy = 1,
Dy = 0.005,
Oy = 0.095,
comma
]{->}(0,9.5398)(0,5.5)(5.25,16)[$t$~(s),0][$x$~(m),90]
\listplot[
plotstyle = dots,
dotstyle = o,
fillcolor = red
]{\daempning}
% \psplot{0}{5}{\spring(x)}
\end{pspicture}
\caption{D{\ae}mpede svingninger af fjeder.}
\label{fig:daempede-svingninger}
\end{figure}
\end{document}
但这三张图还是让我头疼。我该如何绘制它们?
答案1
是COS
又不是ACOS
!
\documentclass{article}
\usepackage{pst-plot,pst-math}
\psset{xunit = 1.95,yunit = 100,algebraic}
\begin{document}
\def\bKonst{0.182323628}
\def\mKonst{0.179887}
\def\kKonst{25.04285714}
\def\omegaSHBKonst{12.1277}
\def\omegadKonst{1.026}
\def\AKonst{0.0264572}
\def\pKonst{0.095398}
% functions (something is wrong here)
\def\spring{\AKonst*Euler^(-x*\bKonst/(2*\mKonst))
*COS(sqrt(\kKonst/\mKonst-(\bKonst/(2*\mKonst)))
*x+ATAN(\bKonst/\mKonst/(\omegaSHBKonst^2-\omegadKonst^2)))
+\pKonst
% 0.0264572*Euler^(-0.506773*x)*COS(11.788*x+0.00694063)+0.095398
}
% data
\readdata{\daempning}{/tmp/test.data}
% plot
\begin{pspicture}(-0.57,0.065)(5.65,0.14)
\psplot[plotpoints=1000]{0}{5}{\spring}
\psplot[plotpoints=100,linecolor=red]{0}{5}{0.0264572*Euler^(-0.506773*x)+0.095398}
\psplot[plotpoints=100,linecolor=red]{0}{5}{-0.0264572*Euler^(-0.506773*x)+0.095398}
\psaxes[xsubticks = 5,Dy = 0.010,Oy = 0.095,comma]{->}%
(0,0.095398)(0,0.06)(5.25,0.13)[$t$~(s),0][$x$~(m),90]
\pstScalePoints(1,1){1000 div}{14000 div 0.006 sub}
\listplot[plotstyle = dots,dotscale=0.5,linecolor=blue]{\daempning}
\end{pspicture}
\end{document}