When connecting lines in Dymola, how could I avoid the zig-zag line, is there any option that allows me to smooth the connection?
Right-clicking on the connection, an selecting "Smooth" will give you a smoothed version (blue) of the original connection (grey). I've added the grey one manually to show the difference, it will not be shown in the model. But I'm not sure this is what you want...
Besides that, it makes most sense to me to align models to enable straight lines. This can be a bit of a pain depending on the placement of the connectors within the icon. The shortcut CTRL+Shift+Arrow-Key can help as it moves the model half of the usual grid.
Another possibility is to add some auxiliary points by clicking when drawing the connection and selecting the interface with Dymola creating the last right angle to the connection. This will make sub-grid connections look less ugly...
I want to use a custom shaped window using gtk3. I found gtk_widget_shape_combine_mask_() in gtk2. The closest thing I can find in gtk3 is gdk_window_shape_combine_region_(), which only allows for rectangular shaped regions. Why was the support dropped? Or was it changed and implemented in a different way?
What do you mean with "why was the support dropped?".
gtk_widget_shape_combine_mask() only supports rectangular shapes, too. That's what a GdkBitmap is: An image with a bit depth of 1. This means that a pixel is either included or not.
This is basically the same as a cairo_region_t. The difference is only in how the data is stored: Instead of a bitmap, cairo_region_t uses a list of rectangles to describe the same result.
"Or was it changed and implemented in a different way?"
Yes and you already found the replacement yourself.
I am loading a bunch of geojson points. I can see that I am loading about 40 points but which ones get displayed on my map seems random and somehow connected to the zoom level. Below you can see that only 2 points of ~40 are displayed.
What criteria does mapbox-gl-js use to decide what to display?
Is there a way to control what points are being displayed? (All of them? Some based on an attribute?)
This is likely occurring because you are using the default text-allow-overlap value of false. The text-allow-overlap documentation reads
If true, the text will be visible even if it collides with other previously drawn symbols.
Because your symbols overlap each other, some are hidden. You can disable this behavior by setting text-allow-overlap to true.
You might find marker clustering to be useful.
I have 42 variables and I have calculated the correlation matrix for them in Matlab. Now I would like to visualize it with a schemaball. Does anyone have any suggestions / experiences how this could be done in Matlab? The following pictures will explain my point better:
In the pictures each parabola between variables would mean the strength of correlation between them. The thicker the line is, the more correlation. I prefer the style of picture 1 more than the style in picture 2 where I have used different colors to highlight the strength of correlation.
Kinda finished I guess.. code can be found here at github.
Documentation is included in the file.
The yellow/magenta color (for positive/negative correlation) is configurable, as well as the fontsize of the labels and the angles at which the labels are plotted, so you can get fancy if you want and not distribute them evenly along the perimeter/group some/...
If you want to actually print these graphs or use them outside matlab, I suggest using vector formats (eg eps). It's also annoying that the text resizes when you zoom in/out, but I don't know of any way to fix that without hacking the zoom function :/
schemaball % demo
schemaball(arrayfun(#num2str,1:10,'uni',false), rand(10).^8,11,[0.1587 0.8750],[0.8333 1],2*pi*sin(linspace(0,pi/2-pi/20,10)))
schemaball(arrayfun(#num2str,1:50,'uni',false), rand(50).^50,9)
I finished and submitted my version to the FEX: schemaball and will update the link asap.
There are a some differences with Gunther Struyf's contribution:
You can return the handles to the graphic object for full manual customization
Labels are oriented to allow maximum left-to-rigth readability
The figure stretches to fit labels in, leaving the axes unchanged
Syntax requires only correlations matrix (but allows optional inputs)
Optimized for performance.
Follow examples of demo, custom labels and creative customization.
Note: the first figure was exported with saveas(), all others with export_fig.
schemaball
x = rand(10).^3;
x(:,3) = 1.3*mean(x,2);
schemaball(x, {'Hi','how','is','your','day?', 'Do','you','like','schemaballs?','NO!!'})
h = schemaball;
set(h.l(~isnan(h.l)), 'LineWidth',1.2)
set(h.s, 'MarkerEdgeColor','red','LineWidth',2,'SizeData',100)
set(h.t, 'EdgeColor','white','LineWidth',1)
The default colormap:
To improve on screen rendering you can launch MATLAB with the experimental -hgVersion 2 switch which produces anti/aliased graphics by default now (source: HG2 update | Undocumented Matlab). However, if you try to save the figure, the file will have the usual old anti-aliased rendering, so here's a printscreen image of Gunther's schemaball:
Important update:
You can do this in Matlab now with the FileExchange submission:
http://www.mathworks.com/matlabcentral/fileexchange/48576-circulargraph
There is an exmample by Matlab in here:
http://uk.mathworks.com/examples/matlab/3859-circular-graph-examples
Which gives this kind of beautiful plots:
Coincidentally, Cleve Moler (MathWorks Chief Mathematician) showed an example of just this sort of plot on his most recent blog post (not nearly as beautiful as the ones in your example, and the connecting lines are straight rather than parabolic, but it looks functional). Unfortunately he didn't include the code directly, but if you leave him a comment on the post he's usually very willing to share things.
What might be even nicer for you is that he also applies (and this time includes) code to permute the rows/columns of the array in order to maximize the spatial proximity of highly connected nodes, rather than randomly ordering them around the circumference. You end up with a 'crescent'-shaped envelope of connecting lines, with the thick bit of the crescent representing the most highly connected nodes.
Unfortunately however, I suspect that if you need to enhance his code to get the very narrow, high-resolution lines in your example plots, then MATLAB's currently non-anti-aliased graphics aren't quite up to it yet.
I've recently been experimenting with MATLAB data and the D3 visualization library for similar graphs - there are several related types of circular visualizations you may be interested in and many of them are interactive. Another helpful, well-baked, and freely available option is Circos which is probably responsible for most of the prettier versions of these graphs you've seen in popular press.
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.