how to erase a line?
361 views (last 30 days)
Show older comments
Hai,
I have drawn a few lines. At the later part of my program I need to delete (remove/erase) those lines, which do not satisfy the required conditions. So, is it possible to remove or erase the lines which have already been drawn, in matlab. Is there any function that supports this. Looking for your reply.
BSD
0 Comments
Accepted Answer
More Answers (2)
Image Analyst
on 11 Nov 2011
If you want to clear just certain specific lines, you can keep track of all your line handles and clear them like Fangjun and Nick showed you. If you want to clear all lines from the axes, then call this function:
%=====================================================================
function ClearLinesFromAxes()
axesHandlesToChildObjects = findobj(gca, 'Type', 'line');
if ~isempty(axesHandlesToChildObjects)
delete(axesHandlesToChildObjects);
end
return; % from ClearLinesFromAxes
If you want, you can pass in an argument via the argument list and use that instead of gca, which is the axes you used last.
function ClearLinesFromAxes(axesToClear)
axesHandlesToChildObjects = findobj(axesToClear, 'Type', 'line');
if ~isempty(axesHandlesToChildObjects)
delete(axesHandlesToChildObjects);
end
return; % from ClearLinesFromAxes
4 Comments
Image Analyst
on 7 Jan 2022
@RK DISSANAYAKA I think you commented on the wrong answer or comment. Your question has nothing to do with anything on this page that I can see. But anyway, to get column #9 from a matrix, you can do
oneColumn = yourMatrix(:, 9);
Which you'll learn after taking this short course:
Nick
on 11 Nov 2011
Are these lines in a figure?
I suppose the easiest way would be to select the lines you dont want with the cursor and hit delete. If you want to do it in your code you could create a seperate handle for each of your line objects and use the delete function.
h(1)=plot(x,y); hold on
h(2)=plot(x,z);
delete(h(2))
Could you be more specific on what your trying to do?
0 Comments
See Also
Categories
Find more on Logical in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!