I'm looking for a way to see the cursor position of a 2D plot in paraview (vtk), that is, see the coordinates of the mouse when I move it over the paraview image.
No, but you can hover over a point and it will show you the x and y values of the plot.
Related
I am new to Orange and using it for data visualization. I want to change the scale of x and y axis while plotting scatter plots. Can you please suggest how can it be done?
You can change scale by zooming in or out. Zoom in with the zoom icon. To zoom out, hold the right mouse button on the figure and drag mouse up or down.
I wanted to change the position of z-axis in a 3d graph. I tried to do using graph properties but it does not work, Matlab has this option in 2D plot in axis properties window in the graph, but it does not work in 3d plots. Currently,the plot is at z=0 and I wanted to the position to z=6. Attached is the sketch where I need to change the position of the curve plot (red) from z=0 to z6. I appreciate if there is any solution/suggestion regarding this issue. Thank you.
sketch
Regards,
Alishah
A very simple solution for this question is that convert z in your formula to z-6. You know it from mathematics, It will shift a curve, 6 unit .
If you want to change in right or left, you plus or minus.
I calculate the rectangular bounding box coordinates for objects in my matlab code ([xmin ymin width height]). But the coordinates might not be precise. Then, I want to draw the box on the image and modify that by dragging the box and/or adjusting the borders. I tried to use imrect and imcrop, but those functions do not draw the draggable/adjustable rectangle on image, based on predefined coordinates. Is there any way to do that?
Thanks in advance for your time.
Take a look at imrect. It works much like the imcrop rectangle but you can set an initial position and get the current position by calling getPosition.
I am trying to obtain the pixel values as and when I move my mouse cursor in Maltab .Can I use g-input function in Matlab? I am not getting how to proceed. All the pixel values are doubles.
Does impixelinfo do what you need? This requires Image Processing Toolbox.
Alternatively, can you just use a Data Cursor? For example, type image to display a default image. Then in the figure toolbar, click the Data Cursor button (looks like a little yellow square and a blue line, with a black crosshair). Finally click on a pixel in the image to display X and Y coordinates, and RGB values of the pixel. You can pick the data cursor up with the mouse and move it around to display other pixels.
I would like to change the view of a 3D plot in matlab such that the y-axis points upward and the z-axis points to left. For example, consider the following plot:
Here the x-axis points forward, the y-axis points to the right and the z-axis points upward.
I would like to have the y-axis points upward and the z-axis points to the left instead. I tried to rotate the plot (using the figure window toolbar rotate button) but I could not get it to work. (It should just be a simple 90 degrees rotation about the x-axis)
Code to generate the plot:
membrane
view(100,50)
xlabel('x-axis');
ylabel('y-axis');
zlabel('z-axis');
grid on
Try using view. I don't have MATLAB available so I can't test it, but I think it can do what you want.
Example from the documentation:
Set the view along the y-axis, with the x-axis extending horizontally
and the z-axis extending vertically in the figure.
view([0 0]);
EDIT:
Try using three inputs to the view function. I can't experiment myself, but you should be able to do it if you choose the right values here.
From documentation:
view([x,y,z]) sets the view direction to the Cartesian coordinates x,
y, and z. The magnitude of (x,y,z) is ignored.
EDIT 2:
Check out camroll. I think camroll(90) (possibly in combination with view) will work.
From documentation:
camroll(dtheta) rotates the camera around the camera viewing axis by
the amounts specified in dtheta (in degrees). The viewing axis is the
line passing through the camera position and the camera target.
This was posted a while ago, but in case someone else is looking for ways to set y-axis as the vertical one here is a possible fix.
Manually: In the command window type cameratoolbar('show') which will open an interactive toolbar in your plot from which you could change the view. One of the options is to set a principle axis to x, y, or z.
Or in you script you could use cameratoolbar('SetCoordSys',coordsys) command which sets the principal axis of the camera motion. coordsys can be: x, y, z, or none.
http://uk.mathworks.com/help/matlab/ref/cameratoolbar.html