How to use legend command
显示 更早的评论
Hello all
I am having the data lets say for seven elements and I am ploting it using a loop in a single figure. But in these seven elements someof the elements contain nothing and then the plot for that is not plotted. Now how I can use the legend command only for the elements that are plotted?
Please guide!!!
Regards
采纳的回答
Mahdi
2014-5-27
Is the loop still telling the figure to plot even if there isn't any data recorded? You have a few ways around it:
The first one basically tells the legend to put an "empty" headline for the second item (if nothing was plotted)
legend('item1', '', 'item3')
You can also only tell MATLAB to plot only when there is data with
if isempty(your_matrix)~=1
plot(x,y)
end
There are also other ways which you can tell the legend to ignore some entries. You can also enter the plot tools (in the top menu of figure) and do it without code.
4 个评论
Sameer
2014-5-27
Wouldn't just adding
legend('item1', 'item2', 'item3')
in your case after the loop solve the problem? If I'm understanding it correctly, I would also change the if statement to be | (or) statements instead of and statements:
if SRE(:,p+1)==0|SPDP(:,p+1)==0|SYfit(:,p+1))==0
Sameer
2014-5-27
Mahdi
2014-5-27
Do you mean that you want the legend to be labelled differently based on the loop?
You can simply do something like this: (this is just an example)
for i=1:3
figure(i)
var1=sprintf('Plot_%d', i)
% Do your plotting here
legend(var1)
end
In this case, the legend would show Plot_1, Plot_2, Plot_3
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Legend 的更多信息
Translated by 
