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How to clear (not close) all the opened figures?

Asked by Giovanni Franzini on 3 Sep 2019
Latest activity Edited by Jan
on 3 Sep 2019
Accepted Answer by Jan
I would like to ask what is the easiest way to clear all the figures (not closing them) already opened.
The "clf" command is useful, but it clears only the current figure.
Is there a command or some easy instruction to clear all figures, such as "close all" used for closing them?

  1 Comment

The shotgun approach is a bad way to write code. Avoid doing this.
"I would like to ask what is the easiest way to clear all the figures"
The simplest solution is to write more robust code: put all of the figure handles into one array, then looping over them is trivially easy and very efficient.

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1 Answer

Answer by Jan
on 3 Sep 2019
Edited by Jan
on 3 Sep 2019
 Accepted Answer

function clfall
FigList = findall(groot, 'Type', 'figure');
for iFig = 1:numel(FigList)
try
clf(FigList(iFig));
catch
% Nothing to do
end
end
end
As Stephen said already: This is a shotgun method. I would not use it in productive code, because this will kill other GUIs.
I'd prefer to insert a button or menu for clearing:
function myFigure(varargin)
FigH = figure(varargin{:});
setappdata(FigH, 'myTag', 'myFigureGroup');
uicontrol('Style', 'PuchButton', 'String', 'clear', ...
'Tooltipstring', 'Celar all figures of this group.', ...
'Units', 'pixels', 'Position', [2, 2, 40,20], ...
'Callback' @myFigureClear);
end
function myFigureClear(FigH, EventData)
FigList = findall(groot, 'Type', 'figure');
for iFig = 1:numel(FigList)
FigH = FigList(iFig);
Tag = getappdata(FigH, 'myTag');
if strcmp(Tag, 'myFigureGroup')
clf(FigH);
end
end
end
Now create new figures, which should be affected by the clearing, with myFigure instead of calling figure. Then an additional button is created in the left bottom, which clears the corresponding figures, but only if the myTag field in the ApplicationData is matching.
By the way, the "my" is for demonstration only. If everybody call his/her personal functions "my...", there will be collisions also. Prefer "gioFra" instead in the tags. "figure2" will be used frequently also, while I have not seen "figureX" yet.

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