[MATLAB基础] 运行中出现这样的警告：Warning: Rank deficient, rank = 67, tol = 1.3995e-019.怎么回事

[mjq1984]

clc;
clear all;
close all;
%----------读取原始地震数据----------%
[data_X,Head_X]=readsegy('2_NS_Vx_sc.sgy');
[data_Y,Head_Y]=readsegy('2_NS_Vy_sc.sgy');
[data_Z,Head_Z]=readsegy('2_NS_Vz_sc.sgy');
nx=100;
nt=2000;
%----------绘制原始地震数据----------%
% figure(1);
% wigb(data_X,10);
% figure(2);
% wigb(data_Y,10);
% figure(3);
% wigb(data_Z,10);

%----------对各分量地震数据做广义S变换----------%
X_ts_linear=zeros(nt,nx);
Y_ts_linear=zeros(nt,nx);
Z_ts_linear=zeros(nt,nx);

X_ts_cricular=zeros(nt,nx);
Y_ts_cricular=zeros(nt,nx);
Z_ts_cricular=zeros(nt,nx);

for i=1:nx % 地震道循环
i
[st_matrix_X,st_time_X,st_freq_X]=GST(data_X(:,i),0.01,39.0625,0.5,1.5,nt);
[st_matrix_Y,st_time_Y,st_freq_Y]=GST(data_Y(:,i),0.01,39.0625,0.5,1.5,nt);
[st_matrix_Z,st_time_Z,st_freq_Z]=GST(data_Z(:,i),0.01,39.0625,0.5,1.5,nt);

% pcolor(abs(st_matrix_X));shading interp;%显示第55道滤波后信号的时频谱

%----------计算各分量时频谱的实部和虚部----------%
Xr=real(st_matrix_X);
Xi=imag(st_matrix_X);

Yr=real(st_matrix_Y);
Yi=imag(st_matrix_Y);

Zr=real(st_matrix_Z);
Zi=imag(st_matrix_Z);

%----------由各分量时频谱的实部和虚部计算时频域极化参数谱----------%
A=Xr.^2+Xi.^2+Yr.^2+Yi.^2+Zr.^2+Zi.^2;
B=Xr.^2-Xi.^2+Yr.^2-Yi.^2+Zr.^2-Zi.^2;
C=-2*(Xr.*Xi+Yr.*Yi+Zr.*Zi);

a=sqrt((A+sqrt(B.^2+C.^2))/2);
b=sqrt((A-sqrt(B.^2+C.^2))/2);
I=atan(sqrt((Zr.*Yi-Zi.*Yr).^2+(Zr.*Xi-Zi.*Xr).^2)/(Yr.*Xi-Yi.*Xr));
phi0=1/2*atan(C./B);
omega0=atan((b.*(Zr.*cos(phi0)-Zi.*sin(phi0)))/(-a.*(Zr.*sin(phi0)-Zi.*cos(phi0))));
OMIG=atan((Zr.*Yi-Zi.*Yr)/(Zr.*Xi-Zi.*Xr));
omega=omega0-pi/2*(sign(omega0)-1);
phi=phi0+pi/2*(sign(omega0)-1)*sign(phi0);

%----------由时频域极化参数谱计算各分量实部和虚部的“线性”部分和“圆形”部分----------%
Xr_linear = (a-b).*cos(phi).*(cos(omega).*cos(OMIG)-sin(omega).*sin(OMIG).*cos(I));
Xr_cricular= b.*(cos(phi).*(cos(omega).*cos(OMIG)-sin(omega).*sin(OMIG).*cos(I))...
+sin(phi).*(sin(omega).*cos(OMIG)+cos(omega).*sin(OMIG).*cos(I)));

Xi_linear = (a+b).*cos(phi).*(sin(omega).*cos(OMIG)+cos(omega).*sin(OMIG).*cos(I));
Xi_cricular= -a.*(cos(phi).*(sin(omega).*cos(OMIG)+cos(omega).*sin(OMIG).*cos(I))...
+sin(phi).*(cos(omega).*cos(OMIG)-sin(omega).*sin(OMIG).*cos(I)));

Yr_linear = (a-b).*cos(phi).*(cos(omega).*sin(OMIG)+sin(omega).*cos(OMIG).*cos(I));
Yr_cricular= b.*(cos(phi).*(cos(omega).*sin(OMIG)+sin(omega).*cos(OMIG).*cos(I))...
+sin(phi).*(sin(omega).*sin(OMIG)-cos(omega).*cos(OMIG).*cos(I)));

Yi_linear = (a+b).*cos(phi).*(sin(omega).*sin(OMIG)-cos(omega).*cos(OMIG).*cos(I));
Yi_cricular= -a.*(cos(phi).*(sin(omega).*sin(OMIG)-cos(omega).*cos(OMIG).*cos(I))...
+sin(phi).*(cos(omega).*sin(OMIG)+sin(omega).*cos(OMIG).*cos(I)));

Zr_linear = (a+b).*cos(phi).*sin(omega).*sin(I);
Zr_cricular= -b.*(cos(phi).*sin(omega).*sin(I)+sin(phi).*cos(omega).*sin(I));

Zi_linear = (-a+b).*sin(phi).*sin(omega).*sin(I);
Zi_cricular= -b.*(sin(phi).*sin(omega).*sin(I)+cos(phi).*cos(omega).*sin(I));

%---由各分量实部和虚部的“线性”部分和“圆形”部分计算各分量“线性”部分和“圆形”部分---%
%---各分量“线性”部分---%
X_linear = Xr_linear + i.*Xi_linear;
Y_linear = Yr_linear + i.*Yi_linear;
Z_linear = Zr_linear + i.*Zi_linear;

%---各分量“圆形”部分---%
X_cricular = Xr_cricular + i.*Xi_cricular;
Y_cricular = Yr_cricular + i.*Yi_cricular;
Z_cricular = Zr_cricular + i.*Zi_cricular;

%---计算各分量“线性”部分和“圆形”部分的S反变换，得到各分量的时间域线性信号和圆形信号---%
[linear_ts_X] = inverse_st(X_linear);
X_ts_linear(:,i)=linear_ts_X; % X分量的时间域线性信号X_ts_linear

[linear_ts_Y] = inverse_st(Y_linear);
Y_ts_linear(:,i)=linear_ts_Y; % Y分量的时间域线性信号Y_ts_linear

[linear_ts_Z] = inverse_st(Z_linear);
Z_ts_linear(:,i)=linear_ts_Z; % Z分量的时间域线性信号Z_ts_linear

[cricular_ts_X] = inverse_st(X_cricular);
X_ts_cricular(:,i)=cricular_ts_X; %X分量的时间域圆形信号X_ts_cricular

[cricular_ts_Y] = inverse_st(Y_cricular);
Y_ts_cricular(:,i)=cricular_ts_Y; %Y分量的时间域圆形信号Y_ts_cricular

[cricular_ts_Z] = inverse_st(Z_cricular);
Z_ts_cricular(:,i)=cricular_ts_Z; %Z分量的时间域圆形信号Z_ts_cricular


end % 地震道循环结束


运行结果：
i =

1

Warning: Rank deficient, rank = 67, tol = 1.3995e-019.
> In Gener_ST at 53
Warning: Rank deficient, rank = 871, tol = 2.7482e-018.
> In Gener_ST at 55
Warning: Rank deficient, rank = 84, tol = 2.5014e-018.
> In Gener_ST at 56
??? Error using ==> times
Matrix dimensions must agree.

Error in ==> Gener_ST at 61
Xr_linear = (a-b).*cos(phi).*(cos(omega).*cos(OMIG)-sin(omega).*sin(OMIG).*cos(I));
想请教一下，是什么原因？谢谢
程序用到的函数和数据在附件里。