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File:Sine integral.svg

Summary

Description
English: The plot of integral of the sinc function: \mathrm{Si}(x)=\int\limits_0^x\frac{\sin(t)}{t}dt having an asymptote at x=\pi/2
AsymptoteLogo.svg
This vector graphics image was created with Asymptote.
Date 8 June 2011
Source Own work
Author Krishnavedala

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I, the copyright holder of this work, hereby publish it under the following licenses:
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GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.

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Source

This image has been created using python and can also be plotted using the following matlab source code.

margin = 0.3;
x = 0:0.01*pi:8*pi;  y = sinint(x);
 
plot(x,y); hold on
plot( [min(x) max(x)], [pi/2 pi/2] , 'k:')  % the asymptote
axis([min(x) max(x)  min(y)  max(y)+margin])
title('{\bfSine integral}'); legend('Si({\itx})', 'asymptote at {\itx}\rightarrow\infty')
xlabel('$x$', 'Interpreter','latex')
ylabel('${\mathop{\rm Si}\nolimits} \left( x \right) = \int\limits_0^x {\frac{{\sin t}}{t}dt}$',...
    'Interpreter','latex')
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