我对Matlab数字有疑问。 我在Matlab中使用bar3函数并想调整轴

Question

I have a 2d matrix called myval. Its size is 21x11.

What I want to do is plot only the first 11 rows and all columns ie 11x11. So I use a bar3 function in matlab to do this which gives me a good plot.

Now the z axis is the actual value stored in myval matrix. But it so happens that I want the x and y axis values (which represent the corresponding row and column) to start at 0 instead. That is value of (1,1) will be (0,0) and value at (1,2) will be (0,1). I do not want to change the actual value in the myval matrix. I just want to shift the axis. this is my actual code

     bar3(myval(1:t,:));
     xlim([0 p]); 
     ylim([0 t]);
     zlim([0 1); 
     set(gca,'fontsize',16); 
     set(gca,'XTick',(0:2:p)); 
     set(gca,'YTick',0:2:t); 
     set(gca,'ZTick',0:1);

Answer 1

You need to give bar3 both an x and Y input then the columns will appear where you want them.

x = 0:10;
Y = myval(1:t,:);
bar3(x,Y)

Or, to controll both the x and y axis, you can use:

x = 0:10;
bar3(Y)
set(gca,'YTickLabel', x)
set(gca,'XTickLabel', x)