Error in XData=get(get(gca,'children'),'XData)

2 次查看（过去 30 天）

Ean Soo 2011-3-19

Hie guys, i have an error with the command above.

XData=get(get(gca,'children'),'XData');

YData=get(get(gca,'children'),'YData');

y_BPFO = interp1(XData,YData,BPFO);

I used this codes in my GUI. It works well when i have 1 axes in my GUI. But when i have 2 axes, it prompt me this error log,

??? Error using ==> interp1 at 121

X must be a vector.

Error in ==> maingui>updateAxes at 130

y_BPFO = interp1(XData,YData,BPFO);

Error in ==> gui_mainfcn at 96

feval(varargin{:});

Error in ==> maingui at 42

gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uicontrol Callback

Paulo Silva 2011-3-19

Instead of gca you should use the handle for the axes that contains the data you want.

If you really want to use gca you can choose what's the current axes before, example:

axes(handles.axes2);

Your code doesn't ensure that there are children and that they contain useful data for interp1.

Ean Soo 2011-3-19

Hie there, can i know if this command correct?

y=get(handles.axes3,'ylim');

plot(handles.axes3,[BPFI BPFI],y,'-r');

Paulo Silva 2011-3-19

y=get(handles.axes3,'ylim');

axes(handles.axes3); %make axes3 the current axes

line([BPFI BPFI],y,'LineStyle','--','Color',[1 0 0]) %draw the line

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