I need help to fix my quiver in my graph

i don't know why my quiver don't work here, i'm trying to make vector lines in this graph

clear; clc;
k = 0.04;
M = 5;
syms t T
f(t,T) =   log( abs( (T-M) ./ (T+M) ) ) - 2*atan( T/M ) - 4*M^3*k*t
g = matlabFunction(f)
tnum = linspace(0,5,1000);
Tnum = linspace(-5,2,1000);
[tt,TT] = meshgrid(tnum,Tnum);
zz = g(tt,TT);
contour(tt,TT,zz,"ShowText","on")
colormap jet
colorbar
title("T(t) para vários c")
xlabel('t'); ylabel('T(t)')
quiver(t,T);
[t,T] = meshgrid(-10:.1:10,-10:.1:10-10:.1:10);
quiver(t,T); %<------- i dunno why dont work
grid on;

[KSSV]

quiver X,Y,u,v ot u, v...

Remove the quiver before meshgrid i.e. last but one quiver. But this not what you are expecting.

[Ian Samuelsson]

i don't get it, i remove the quiver before the mesh, but the vectors dont apear in my waves, anyway thanks for the help !