Matlab - necesito ayuda con leer matrices, y ademas con mostrar las grafias de mi script por guide.

str2num(get(handles.edit1,'String'));

function ejemplo

uicontrol('style','edit','Callback',@leer)

end

function leer(s,~)

a=str2num(get(s,'String'));

disp(a)

end

function pushbutton1_Callback(hObject, eventdata, handles)

puntos=str2num(get(handles.edit1,'string'));

syms X

x=puntos(:,1)';

Y=puntos(:,2)';

par=str2num(get(handles.edit5,'string'));

minx=min(x);

maxx=max(x);

if (minx<=min(par)&& max(par)<=maxx)

y=Y;

w=length(x);

n=w-1;

L=zeros(w,w);% coeficiente de lagrange

for k=1:n+1;

    V=1;

    for j=1:n+1

        if k~=j

            V=conv(V,poly(x(j)))/(x(k)-x(j));

        end

    end

    L(k,:)=V;

end

C=y*L;% coeficientes del polinomio POR COLUMNAS

for k=1:w

   F=X^(w-k);

   l=C(k);

   U(1,k)=l*F;%fUNCION DEL POLINOMIO

end

suma=0;

for k=1:length(U)

    suma=U(1,k) + suma;

end

f=suma;

I1=int(f,min(par),max(par));

set(handles.text3,'string',num2str(I1))

ejex=minx:0.1:maxx;

plot(handles.axes1,x,y,'Om')

hold on;

plot(handles.axes1,ejex,polyval(C,ejex))

hold on

plot(handles.axes1, [par(1) par(1)],[ 0 subs(f,par(1))],'r','linewidth',5)

hold on

plot(handles.axes1, [par(2) par(2)],[ 0 subs(f,par(2))],'r','linewidth',5)

hold on

ejex=min(par):0.1:max(par);

area(handles.axes1,ejex,subs(f,ejex))

hold on

grid on

h=1;

df1=(-subs(f,X,par(1)+2*h)+ 8*subs(f,X,par(1)+ h)-8*subs(f,X,par(1)-h)+ subs(f,X,par(1)-2*h))/12*h;

gr1=df1*(X-par(1)) + subs(f,par(1));

p=subs(gr1,ejex);

plot(handles.axes1,ejex,p,'g','linewidth',2)

hold on

df2=(-subs(f,X,par(2)+2*h)+ 8*subs(f,X,par(2)+ h)-8*subs(f,X,par(2)-h)+ subs(f,X,par(2)-2*h))/12*h;

gr2=df2*(X-par(2)) + subs(f,par(2));

p2=subs(gr2,ejex);

plot(handles.axes1,ejex,p2,'k','linewidth',2)

title('Grafica de Pn(x)')

end