Undefined function or variable 'currentFigure'. Error in matlab.gra​phics.inte​rnal.newpl​otwrapper (line 14) if isempty(currentFigure)

2 次查看（过去 30 天）
zin zin
zin zin 2018-11-11
评论： zin zin 2018-12-2
why i am taking this error? how can i fix it?
  3 个评论
显示 1更早的评论
Stephanie Stewart
Stephanie Stewart 2018-12-2
p1=0;
p2=-2;
poles=[p1,p2];
num=[1];
den=poly(poles);
k=[0:0.01:10];
r=rlocus(num,den,k);
damp1= 0;
damp2=.45;
damp=[damp1,damp2];
om1=0;
om2=100;
om=[om1,om2];
grid on;
sgrid('new');
sgrid(damp, om);
grid on;
plot(r, '*');
I got the error when i tried to run this code. But i got the error in line 12.
this code worked 2 days ago...
now the plot function will not work

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

madhan ravi
madhan ravi 2018-11-11
编辑：madhan ravi 2018-11-11
see https://www.mathworks.com/matlabcentral/answers/263788-how-to-detect-if-a-figure-exist#answer_206155 similar case
g = groot; %edited after sir Walter's comment
isempty(g.Children) % True if there are no open graphics objects, false otherwise
%---------------------------
fig = get(groot,'CurrentFigure');
~isempty(fig)
  6 个评论
显示 4更早的评论

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by