MatLab畫三維圖和等高圖

a=xlsread('C:\Users\cw\Desktop\每個位置每小時有多少記錄.csv');

% a(37:47,1)=4;a(48:59,1)=5;a(60:64,1)=6;a(65:77,1)=7;a(78:92,1)=8;
% a(93:99,1)=9;a(100:104,1)=10;a(105:114,1)=11;a(115:125,1)=12;a(23:36,1)=13;
% A=[a(1:22,1);a(37:104,1);a(105:114,1);a(115:125,1);a(23:36,1)]; %從B矩陣取出第一列的所有行
% B=[a(1:22,2);a(37:104,2);a(105:114,2);a(115:125,2);a(23:36,2)];
% C=[a(1:22,3);a(37:104,3);a(105:114,3);a(115:125,3);a(23:36,3)];

A=a(:,1);
B=a(:,2);
C=a(:,3);
xx=linspace(min(A),max(A),50); %產生min(A)到max(A)均攤的50個點，目的上擬合離散點數量上的不足
yy=linspace(min(B),max(B),50); 
[xt,yt]=meshgrid(xx,yy); %做成二維網格
zt=griddata(A,B,C,xt,yt,'v4'); %用v4點的方式進行填充

surf(xt,yt,zt) %輸出三維圖
set(gca,'xtick',0:1:10)
set(gca,'xticklabel',{'a','a','a','a','a','a','a','a','a','a','a','a','a'})%x軸改漢字

figure(3),contourf(xt,yt,zt) %輸出等高線圖
caxis([0,10]);%等高線顏色區間，即z軸數值
%set(gca,'xticklabel',{''})%x軸刻度不顯示
set(gca,'xtick',-2:1:13)
colorbar%對等高線添加一個顏色代表的深度