code如下：

lb = -1:.25:.75;

for m = 1:length(lb)

   for n = 1:length(lb)

       h = text(lb(m)+.07,lb(n)+.12,num2str(pp(m,n))); %%关键是这句，循环写入每个格点内的数据量

       set(h,'color','m','fontsize',10,'backgroundcolor',[.9 .9 .9]);

   end

end

clear m n;

效果类似于图：

图来自：https://cn.mathworks.com/matlabcentral/answers/154877-how-to-plot-a-10-10-grid-map-and-how-to-number-the-grid-cells-sample-pic-is-attached-here