Problem by drawing a line on axes
3 次查看(过去 30 天)
显示 更早的评论
Hallo,
I want to draw a vertical line on an axes on GUI after selecting a point through which the line passes using a callback button.
I have 2 Problems:
1- I can choose a point that is outside the axes.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/200546/image.png)
2- After clicking with the mouse to choose the point, the drawn line doesn't pass through the point and it is not vertical.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/200547/image.png)
Here is my code:
% --- Executes on button press in draw.
function draw_Callback(hObject, eventdata, handles)
% hObject handle to draw (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%h = imline(gca);
axes(handles.axes)
[x,y] = ginput(1);
h = line ([x,y], ylim);
0 个评论
采纳的回答
Adam Danz
2019-1-10
编辑:Adam Danz
2019-1-10
There are two errors.
First, you're getting a diagonal line because the first input of line() contains all x-values but you're entering [x,y].
Second, there's no need to use the y-coodinate of the ginput().
Here's what you want:
line([x,x], ylim)
In addition to this, I suggest using the asix handle to ylim in case a different axis is current.
line([x,x], ylim(h)) %h is the handle to your gui axis.
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Graphics Object Programming 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!