我正在运行一个循环,其中计算变量。能够看到这些变量的当前值是有用的。打印它们没有用,因为循环的其他部分正在打印大量文本。此外,在Workspace
选项卡上,这些值在循环结束前不会显示。
有没有办法监控这些变量,f.i。将它们打印到窗口中?
答案 0 :(得分:6)
您可以使用text
对象创建一个数字,并根据所需的变量更新其'string'
属性:
h = text(.5, .5, ''); %// create text object
for n = 1:1000
v = n^2; %// loop computations here. Variable `v` is to be displayed
set(h, 'string', ['Value: ' num2str(v)]);
drawnow %// you may need this for immediate updating
end
为了提高速度,您只能更新每S
次迭代:
h = text(.5, .5, ''); %// create text object
S = 10; %// update period
for n = 1:1000
v = n^2; %// loop computations here. Variable `v` is to be displayed
if ~mod(n,S) %// update only at iterations S, 2*S, 3*S, ...
set(h, 'string', ['Value: ' num2str(v)]);
drawnow %// you may need this for immediate updating
end
end
或使用drawnow('limitrate')
,如@Edric所述:
h = text(.5, .5, ''); %// create text object
for n = 1:1000
v = n^2; %// loop computations here. Variable `v` is to be displayed
set(h, 'string', ['Value: ' num2str(v)]);
drawnow('limitrate')
end