I am currently using the fill command in MATLAB to create a graph of boxes that were created using the 'fill' command (the actual code is based off this StackOverflow Question.
My issue is that the boxes that I create do not have "corners." I am attaching a PNG that illustrates the issue. Note that you have to look a little carefully since the image was heavily rendered, though in this example my arrows also look weird since they don't have edges either)
I am wondering if anyone has an idea of what might be going wrong? The boxes appear this way immediately after I use the fill command, which has the following structure:
fill(X,Y,MyFaceColor,'FaceAlpha',0.5,'EdgeColor', MyEdgeColor,'LineStyle','','LineWidth',box_line_width,'EdgeAlpha',1)
The function fill appears to leave space for corner markers if they are not explicitly defined. Hence, calling fill with the marker property will solve your problem. However, since markers and linewidths seem to work on different scales, you will have to play around with the marker size to get smooth edges.
Example:
fill(X,Y,'r','FaceAlpha',0.5,'EdgeColor', 'k',...
'LineWidth', 5,'EdgeAlpha',1 , 'marker', '.', 'markersize', 15)
Related
I am trying to get better quality phase plots of complex functions made with the Complex Function Explorer of E. Wegert CFE. For this purpose I apply the Matlab anti-aliasing function myaa.m to the phase plots that are made with the CFEGUI.m. For the example screenshot of the result window below I used the setting myaa([8 8]) in the Matlab command window which means that the supersampling enlarge the figure 8x and then downscale it to 1/8 to get the original h x w.
As one can see the window of the figure has no operation icons or menu options for save or print. My question is what to do with such a figure (beside making screenshots)? Can I somehow use export-fig to save such a figure or load it in an image array and if yes, how?
It is also possible to use the setting myaa([8 1]) which results in a very large figure window that is larger than my screen (and has the unpleasant attribute that it can not be moved). It would be even better if such a whole figure could be saved (not only the visible part).
You can use getframe to grab current figure information in pixels.
However, while I do not know how this affects you, notice that MATLAB versions above 2014b (included) have already anti-aliasing. The code you linked seem to be from 2008, I am not 100% sure if it has become obsolete now.
I am using jupyter-notebook to write some python code and generate figures. As I wanted to add tooltips on mouse hovering and other interactions with the generated graphs, I now use mpld3 to display the graph.
However, as I have quite a lot of things to plot, I need to increase the figure size. So, I putfig = plt.figure(figsize=(20, 10)).
When I display with the standard way, I can see all the figure in my notebook (with horizontal sliders if I increase a bit more the figsize).
But with the mpld3 display, the size of the zone where the figure is displayed seems to be fixed, and hence, I can only see the upper left part of my figure. There are no sliders or anything to increase the displaying zone size.
For example, this code generate a graphic, for which you will see only the upper left part:
fig = plt.figure(figsize=(20, 10))
plt.plot([3,1,4,1,5], 'ks-')
mpld3.display(fig)
Does anyone know how to deal with this ? That is, how to increase the default display zone size, in order to have bigger graphs ?
Thanks
Edit after comment:
Here is a screenshot of how it is displayed on my machine...
And I would like it to be displayed just as it is on yours !
So I guess the problem comes from elsewhere... do you have any idea of how to solve this ?
I hope I do understand your question correctly but in Ipython Notebooks you can only use excisting space and not flip the notebook into wide screen mode or alike. In my notebook the graphic is also displayed like you show.
However, there is an easy fix, simply reduce the figsize to for example (10, 5). The main idea with interactive plotting with mpld3 is that the user can zoom in to specific interesting details. For the presented example it would not make much sense but richer graphs are great to be explored interactively.
I'm using TabPanel for building my GUI. The problem is, that when I'm drawing rectangle it appears outside of my axes. Problem does not exist when not using TabPanel.
I was testing 'clipping' parameter, but my object is still outside axes (fig).
Any hints?
thanks!
I have good news and bad news. (There is no answer all over the internet, I just saw unanswered requests like this one).
I had exactly the same problem. After checking, the problem is actually restrained to MARKERS (so either marker not set to none in the case of plots, or scatters). If I only plot lines, it stays clipped.
The issues is the renderer of the figure in which your plot is. You have to set it to "painter" or "zbuffer" and not "openGL". Sadly only the latter lets you plot transparent images :( . I think Matlab should fix this issue so we can have both unclipped markers and transparent images in the same figure...
K>> get(handles.output,'Renderer')
ans =
OpenGL
K>> set(handles.output,'Renderer','painter')
Yanis
edit: the solving might be similar for rectangles I hope.
When I make a figure in Matlab, with a legend and a rectangle that touches the y axis (strange, I know) upon exporting the figure to eps (or pdf) I've noticed that the rectangle obtains the line-style of the last line drawn (rather than what the rectangle was drawn with)
This behaviour also occurs for rectangles drawn after the one that touches the axis...
This doesn't happen if the rectangle is drawn before the legend is created....
Needless to say, it took me half a day to create a minimal example:
clf
L=plot(X,sin(X),'--');
legend(L,'sin(x)')
rectangle('position',[0.001,.1,.7,.7])
rectangle('position',[0,.5,.6,.7])
rectangle('position',[0.001,.3,.5,.7])
%legend(L,'sin(x)')
On the screen the 3 rectangle have solid lines, as they should. but once they are exported, the result has the last two with dashed lines (like the sin(x)). If the legend command is done later (as in the commented out line), everything works as it should....
Is this a feature or a bug?
This is not a feature. I am submitting this to development.
You found a workaround that works with minimal code gymnastics. I would document it in your code so someone does not change it unknowingly and move on.
If you are open to other output formats, notice this is not an issue with formats that use an output filter of MATLAB.
http://www.mathworks.com/access/helpdesk/help/techdoc/ref/print.html
(Graphic Format Files section, right column in table)
-Doug, Advanced Support at MathWorks dealing with graphical issues.
I have a question about the values returned by getPosition. Below is my code. It lets the user set 10 points on a given image:
figure ,imshow(im);
colorArray=['y','m','c','r','g','b','w','k','y','m','c'];
pointArray = cell(1,10);
% Construct boundary constraint function
fcn = makeConstrainToRectFcn('impoint',get(gca,'XLim'),get(gca,'YLim'));
for i = 1:10
p = impoint(gca);
% Enforce boundary constraint function using setPositionConstraintFcn
setPositionConstraintFcn(p,fcn);
setColor(p,colorArray(1,i));
pointArray{i}=p;
getPosition(p)
end
When I start to set points on the image I get results like [675.000 538.000], which means that the x part of the coordinate is 675 and the y part is 538, right? This is what the MATLAB documentation says, but since the image is 576*120 (as displayed in the window) this is not logical.
It seemed to me like, somehow, getPosition returns the y coordinate first. I need some clarification on this.
Thanks for help
I just tried running your code in MATLAB 7.8.0 (R2009a) and had no problems with image sizes of either 576-by-120 or 120-by-576 (I was unsure which orientation you were using). If I left click inside the image, it places a new movable point. It did not allow me to place any points outside the image.
One small bug I found was that if you left-click in the image, then drag the mouse pointer outside the image while still holding the left button down, it will place the movable point outside the image and won't display it, displaying a set of coordinates that are not clipped to the axes rectangle.
I'm not sure of what could be your problem. Perhaps it's a bug with whatever MATLAB version you are using. I would suggest either restarting MATLAB, or clearing all variables from the workspace (except for the image data im).
Might be worth checking to see which renderer you are using (Painter or OpenGL), a colleague showed me some wierd behaviour with point picking when using the OpenGL renderer which went away when using the Painter renderer.
Your code uses the Image Processing Toolbox, which I don't have, so this is speculation. The coordinate system is probably set to the figure window (or maybe even the screen), not the image.
To test this, try clicking points outside the image to see if you can find the origin.