matlab函数无法识别

我调用一个函数时，已经将函数放置到了工作路径，不知道为什么一直显示函数或变量无法识别。

下面是调用的函数

function p = twomodegauss(m1, sig1, m2, sig2, A1, A2, k)
%TWOMODEGAUSS Generates a two-mode Gaussian function.
%   P = TWOMODEGAUSS(M1, SIG1, M2, SIG2, A1, A2, K) generates a
%   two-mode, Gaussian-like function in the interval [0, 1]. P is a
%   256-element vector normalized so that SUM(P) = 1. The mean and
%   standard deviation of the modes are (M1, SIG1) and (M2, SIG2),
%   respectively. A1 and A2 are the amplitude values of the two
%   modes. Since the output is normalized, only the relative values
%   of A1 and A2 are important. K is an offset value that raises the
%   "floor" of the function. A good set of values to try is M1 =
%   0.15, SIG1 = 0.05, M2 = 0.75, SIG2 = 0.05, A1 = 1, A2 = 0.07,
%   and K = 0.002.

%   Copyright 2002-2009 R. C. Gonzalez, R. E. Woods, and S. L. Eddins
%   From the book Digital Image Processing Using MATLAB, 2nd ed.,
%   Gatesmark Publishing, 2009.
%
%   Book web site: http://www.imageprocessingplace.com
%   Publisher web site: http://www.gatesmark.com/DIPUM2e.htm

c1 = A1 * (1 / ((2 * pi) ^ 0.5) * sig1);
k1 = 2 * (sig1 ^ 2);
c2 = A2 * (1 / ((2 * pi) ^ 0.5) * sig2);
k2 = 2 * (sig2 ^ 2);
z  = linspace(0, 1, 256);

p = k + c1 * exp(-((z - m1) .^ 2) ./ k1) + ...
    c2 * exp(-((z - m2) .^ 2) ./ k2);
p = p ./ sum(p(:));

你的文件运行当前路径和将要运行的two什么什么的那个文件不再有效路径下，系统找不到这个函数。