I have a matrix 2250 by 4 which is later then plot into a velocity field using quiver. I am having problems now producing the contour plot can anyone help me plot this.

this is my code clear all; close all; clc; fprintf('Applided Fluids Mech. HW2~JM')

fid = fopen('2016 Sept 7 - Vortex 1_0001.txt'); A = textscan(fid,'%n %n %n %n ', 'delimiter', ',', 'headerlines',3); A = cell2mat(A); fclose(fid);

x= A(1:2250 ,1); y= A(1:2250 ,2); u= A(1:2250, 3); v= A(1:2250, 4);

figure quiver(x,y,u,v) hold on

[Johnaton McAdam]

clear all;
close all;
clc;
fprintf('Applided Fluids Mech. HW2~JM')

fid = fopen('2016 Sept 7 - Vortex 1_0001.txt'); 
A = textscan(fid,'%n %n %n %n ', 'delimiter', ',', 'headerlines',3);
A = cell2mat(A);
fclose(fid);

x= A(1:2250 ,1);
y= A(1:2250 ,2);
u= A(1:2250, 3);
v= A(1:2250, 4);

figure
quiver(x,y,u,v)
hold on

[KSSV]

what contour plot you want?