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

why i am taking this error? how can i fix it?

[Walter Roberson]

In MATLAB CurrentFigure is a property you can get from the graphic root object but currentFigure is not the name of any Mathworks supplied routine.

If we had more context we might be able to figure out what should be used there.

[Stephanie Stewart]

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

[zin zin]

are you getting the same error? like CurrentFigure error?

Answer 1

[madhan ravi]

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)

[Walter Roberson]

In any context in which you bother to talk about current figure, you should not be assuming that you are using figure 1.

[madhan ravi]

https://www.mathworks.com/matlabcentral/answers/263788-how-to-detect-if-a-figure-exist#answer_206155

[madhan ravi]

see edited answer

[zin zin]

thanks a lot..

[madhan ravi]

istediğin zaman :)

[zin zin]

:)