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求教:MATLAB 中bezier curve的函数为何?以及其使用?

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发表于 2004-9-25 05:04:36 | 显示全部楼层 |阅读模式
<>求教:MATLAB 中bezier curve的函数为何?以及其使用?请各位不吝赐教!谢谢!!</P>
<>可直接回复,也可以EMAIL本人。谢谢!!</P>
<>本人EMAIL:<a href="mailtLXFMICKEY2002@21CN.COM" target="_blank" >LXFMICKEY2002@21CN.COM</A></P>
发表于 2004-9-26 07:34:05 | 显示全部楼层
<>当时学习数学物理时,在特殊函数里有贝赛尔函数,曾练习过,好像是besselj</P><> 今天在29所没时间,后天回去后帮你查查</P>
发表于 2004-9-26 20:43:37 | 显示全部楼层
BESSELJ Bessel function of the first kind.
    J = BESSELJ(NU,Z) is the Bessel function of the first kind, J_nu(Z).
    The order NU need not be an integer, but must be real.
    The argument Z can be complex.  The result is real where Z is positive.

    If NU and Z are arrays of the same size, the result is also that size.
    If either input is a scalar, it is expanded to the other input's size.
    If one input is a row vector and the other is a column vector, the
    result is a two-dimensional table of function values.

    J = BESSELJ(NU,Z,1) scales J_nu(z) by exp(-abs(imag(z)))

    [J,IERR] = BESSELJ(NU,Z) also returns an array of error flags.
        ierr = 1   Illegal arguments.
        ierr = 2   Overflow.  Return Inf.
        ierr = 3   Some loss of accuracy in argument reduction.
        ierr = 4   Complete loss of accuracy, z or nu too large.
        ierr = 5   No convergence.  Return NaN.

    Examples:

        besselj(3:9,(0:.2:10)') generates the entire table on page 398
        of Abramowitz and Stegun, Handbook of Mathematical Functions.

        MEMBRANE uses BESSELJ to generate the fractional order Bessel
        functions used by the MathWorks Logo, the L-shaped membrane.
 楼主| 发表于 2004-9-27 01:58:58 | 显示全部楼层
<>衷心感谢各位的帮忙!</P><>谢谢!!</P>
发表于 2004-9-27 04:15:49 | 显示全部楼层
<>终于回来了。呵呵,斑竹已回复了,再加点料吧。</P><>besselj,bessely为贝塞尔函数</P><>besseli,besselk为改良型的贝塞尔函数</P><P>besselh为第三类贝塞尔函数</P><P>具体用法,查help吧</P>
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