用matlab读入文件，打印点

fdata = fopen('E:\iis\ftp&share\nodeList.txt','r');
A = fscanf(fdata,'%g',[2,100])
%放到一个二维数组
figure
text(A(1,1),A(2,1),'sink')
hold on
%需要hold on,否则画新的内容时候，旧的会被刷掉
plot(A(1,1),A(2,1),'o')
%下表从1开始，而不是从零开始
hold on
for index=2:100
    t = num2str(index)
    %将数字转换成字符串
    x = A(1,index)
    y = A(2,index)
    text(x,y,t)
    plot(x,y,'rx')
    hold on
end

fclose(fdata)