Ode Eroor in GUI matlab....(Error using odearguments (line 90) @(X,Y)(VGU​I+WYGUI)./​(UGUI+WXGU​I) must return a column vector.)

I am working on this project whic is about fluid kinematics in x an y axes and trying to set streamlines to the graph. I have

First, my all functions are handles like below, which takes data from gui edit box and defined like that below.

function ut = ug(handles, x, y)

ut = handles.edit11.String

evalc(ut)

My intend is to plot streamlines like the picture below,

streamlines= dy/dx=(ug+value of wxg)/(vg+value of wyg)

it means ug= 0.8x+05, value(wyg= 0); vg=1.5-0.8*y, wyg= 2.5*sin(w.t) value of wyg= -1,36 when t=5 and w =2

(ug+value of wxg)=0.8x+05+0

(vg+value of wyg)=1.5-0.8*y-1.36

so, my intend is dy/dx=(0.8x+05+0)/(1.5-0.8*y-1.36) but with the functions with ode 45 but ı got an error

ux, vx is a handle function refers ug(handles,x,y),vg(handles,x,y), all function is set to the edit text as a function

wx,wy is a handle function refers wxg(handles,w,t), wyg(handles,w,t) all function is set to the edit text as a function as below

WHEN I PUSH THE BUTTON I GOT ERROR, Main code is below.

MY FUNCTİON IS BELOW

function pushbutton1_Callback(hObject, eventdata, handles)

clc

hold off

axes(handles.axes1);

xilk=str2double(get(handles.edit5,'String'));

xson=str2double(get(handles.edit7,'String'));

yilk=str2double(get(handles.edit8,'String'));

yson=str2double(get(handles.edit9,'String'));

gl=str2double(get(handles.edit10,'String'));

w=str2double(get(handles.edit15,'String'));

t=str2double(get(handles.edit16,'String'));

set(gca, 'XLim', [xilk xson], 'YLim', [yilk yson]);

[x,y]=meshgrid(xilk:gl:xson,yilk:gl:yson);

ugui=eval(ug(handles,x,y));

vgui=eval(vg(handles,x,y));

wxgui=eval(wxg(handles,w,t));

wygui=eval(wyg(handles,w,t));

uu=(ugui)+(wxgui);

vv=(vgui)+(wygui);

quiver(x,y,uu,vv,1.3,'r','linewidth',2);

set(gca, 'XLim', [xilk xson], 'YLim', [yilk yson]);

hold on;

grid on;

%ERROR BEGİNS BELOW

for a=xilk:stgl:xson;

tspan = [a xson+1];

y0 = [yilk yson];

[xx,yy] = ode45(@(x,y) (vgui+wygui)./(ugui+wxgui), tspan, y0);

plot(xxr,yyr,'-k','linewidth',2);

hold on

end

İt gives error.

Error using odearguments (line 90)

@(X,Y)(VGUI+WYGUI)./(UGUI+WXGUI) must return a column vector.

Error in ode45 (line 113)

[neq, tspan, ntspan, next, t0, tfinal, tdir, y0, f0, odeArgs, odeFcn, ...

Error in FLUIDKNM>pushbutton1_Callback (line 267)

[xx,yy] = ode45(@(x,y) (vgui+wygui)./(ugui+wxgui), tspan, y0);

How can i fix this error, with this functions