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From: Mayi DA on 19 Jul 2010 03:24
Dear Bjoern
I met the same problem as you mentioned here, and I am really was confused by this for a long time. In my application, when bar is occurred, MATLAB will give a warning message: Plot emtpy......
I think it is a minor bug in MATLAB. Good luck.

mayi
2010-07-19

"Björn " <bjoern.wettergren(a)vonotobel.ch> wrote in message <hjrse2$cqf$1(a)fred.mathworks.com>...
> Hi,
>
> I have a gui with different axes on. I want to copy these axes into Powerpoint and I have found a way using the very helpful tool saveppt. However, in order to use saveppt I have first to copy the desired axes from the GUI into a new Figure.
> I have solved that problem by using copyobj. Of Course, here another problem has occured. The legend were not copied well at all, however I have found a solution for this too. I use the following code:
>
>
> START CODE....
> parentAxes is the handle of the axes on the GUI:
>
> parentFig = get(parentAxes,'parent');
> allChildren = get(parentFig,'children');
>
>
> copyFigure = figure;
> set(gcf,'Units','normalized');
> set(gcf,'ActivePositionProperty','OuterPosition');
> set(gcf,'PaperPositionMode','auto');
>
> copyAxes = copyobj(parentAxes,copyFigure);
>
> set(gca,'Units','Normalized');
> set(gca,'ActivePositionProperty','OuterPosition');
>
> oldAxis = axis(parentAxes);
> axis(copyAxes,oldAxis);
>
> oldTitle = get(get(parentAxes,'Title'),'String');
> title(copyAxes,oldTitle);
>
> oldxgrid = get(parentAxes,'XGrid');
> oldygrid = get(parentAxes,'YGrid');
>
> set(copyAxes,'XGrid',oldxgrid);
> set(copyAxes,'YGrid',oldygrid);
>
> parentFig = get(parentAxes,'parent');
> allChildren = get(parentFig,'children');
>
> childrenAxes = findall(allChildren,'Type','axes');
>
> for m= 1:length(childrenAxes)
>
> switch get(childrenAxes(m),'Tag')
> case 'legend'
>
> legendData = get(childrenAxes(m),'UserData');
> location = get(childrenAxes(m),'Location');
> legend(legendData.lstrings,'location',location); **********
> end
> end
>
> set(copyFigure,'position',[0 0 1 1]);
>
> P = get(copyAxes,'position');
> P(4) = 0.8;
>
> titleHandle = get(copyAxes,'Title');
> set(titleHandle,'fontsize',20);
>
> saveppt2('powerpointCop','Fig',copyFigure)
>
> close(copyFigure)
> END CODE
>
>
> HOWEVER, now I have the next problem:
> The AXES i want to copy contains either a normal plot or a stem-plot. It works very well if the axes contains a normal plot, but when it contains a stem i cannot insert the legend (I marked that line with ****).
> I think it might be a matlab bug, because I just cannot find where it can gor wrong.
>
> The variables location and legendData.lstrings conatin the correct values. Also if i plot a stem plot from the workspace everything works fine, but here i get the error message:
>
> Warning: Plot empty.
>
> ANY IDEAS???? I have been sitting with this ridiculously simple task (exporting a figure from the gui to powerpoint) for a week now. I find it very strange that MATLAB has not a built in function for this.
>
> I am very thankful for any hints and tips....
>
> Thanks a lot, regards
> Björn
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