I've been working on a project about magnetic fields for my university, and at some point in the MATLAB simulation code I'm creating an interactive mesh plot of the magnetic field at certain points in space. I was wondering as to how I should convert this MATLAB figure to something that I can integrate in a LaTeX pdf. I've read about the media9 package, and I think I'll manage to figure the inserting the file in my .tex file out once I get the figure in an "exportable" form, but I'm not sure as to what I should convert my plot to and how I can do that.
Thanks in advance!
Related
I have constructed a simulator in Simulink that simulates the position of an object. I want to visualize the X-Y position of this object in a matlab figure.
I exported the X-Y data from Simulink to matlab using the To Workspace block. From this I get an x and y time series data out.x_pos and out.y_pos. I can plot them against time with
plot(out.x_pos)
But the following does not work to get an X-Y plot
plot(out.x_pos, out.y_pos)
What is the best way to produce this X-Y plot?
Since no one helped me, I will present what I came up with after eventually reaching the right pages on the MATLAB documentation.
The To Workspace block exports the data as a timeseries object. This object has the values of the signal as a property called Data. To access the property one writes <object>.Data, so to obtain the desired X-Y plot one writes
plot(out.x_pos.Data, out.y_pos.Data)
I would like to produce a plot with two y-axis and two legends, looking something like this:
I have modified a code I found online to produce a high-quality plot to use in reports/papers. I was wondering how you add a second y-axis in such a code? I have attached the matrix and code to produce the high-quality plot: https://drive.google.com/file/d/1aKZLFeoO1wmQ1P2tEiiucvOFI7PehkGL/view?usp=sharing
https://drive.google.com/file/d/1aKZLFeoO1wmQ1P2tEiiucvOFI7PehkGL/view?usp=sharing
NOTE: This is basically a comment, however, it grew too long, and I felt it was too important not to mention properly.
Reporting plots from Matlab should always, unless you have some very good excuse, be done using vector graphics, i.e. pdf, ps, eps or similar format. The reason for this is the quality, e.g. here I have taken your high-quality and the similar pdf-version and zoomed in.
The png version has artifacts. The reason for this is that the png (similar for jpg and more) is that the picture is saved using pixels, thus when you zoom the quality deteriorate.
The pdf version, which is made with vector graphics, save the vectors, thus when I zoom the pdf viewer can regenerate the pixels and maintain the same quality. As an added bonus, the vector-graphic version is typically smaller in size.
This is made in Matlab using
saveas(gcf,'myfigure.pdf')
Use yyaxis to add another plot with an axis. Take a look at the following modified portion of your code.
yyaxis left
plot(N(:,1),N(:,3)/(27.5*2),'b-','DisplayName','Location','LineWidth',lw); %<- Specify plot properites
yyaxis right
plot(N(:,1),N(:,4)/(27.5*2),'r-', 'DisplayName','NorthEast','LineWidth',lw); %<- Specify plot properites
legend('Location', 'NorthEast');
I am workin on a some sort of System test wherein i have a set of readings in the form of a .mat file.
It has a structure in the .mat file with one field as Measurement. It has several Arrays(e.g air mass flow, velocity, carbon content) which further have fields like time and value.
From these, I Need to plot the velocity and the air mass flow against time. For that i wrote the following command which gave me the corresponding plots:
plot(Measurement.(Measurement.air_mass_flow.time),Measurement.air_mass_flow.value)
plot(Measurement.(Measurement.velocity.time),Measurement.velocity.value)
Now i Need to create a script in matlab wherein i can get both the curves one under the other i.e. on the same page. Can anyone help in the Approach i should procede with ?
ok now i will further extend my question.
I have two fields as velocity and acceleration. I Need to plot it on the same curve with grids on for the comparison. But the y axis for both are different.
the velocity y-axis is: (0:20:120), which should be displayed on the left side and the acceleration y-axis is: (0:2:12) which should be displayed on the right side.
i wrote the following code for this:
plot(Measurement.(Measurement.VehV_v.time),Measurement.VehV_v.value)
grid on
set(gca,'xtick',[0:500:2000])
set(gca,'ytick',[0:20:120])
hold on
plot(Measurement.(Measurement.accel_w.time),Measurement.accel_w.value)
grid on
set(gca,'xtick',[0:500:2000])
set(gca,'ytick',[0:2:12])
Do i Need to write a function for that as i am directly reading the values from the structure.
plotyy() also doesnt seem to work
But the axis are not matching and the graph for acceleration is very small. Could anyone help me out with this ?
I also want to add a Picture of the Graphs here but unfortunately there is some error here. I hope the question is clear without the Picture.
Yes you can use the subplot command, e.g.:
figure
subplot(1,2,1)
plot(Measurement(Measurement.air_mass_flow.time),Measurement.air_mass_flow.value)
subplot(1,2,2)
plot(Measurement.(Measurement.velocity.time),Measurement.velocity.value)
You can use help subplot on Matlab for further details or have a look at this:
https://www.dartmouth.edu/~rc/classes/matlab_graphics/Matlab-subplots.html
I am trying to export filled contour plots from Matlab as vector graphics to include in a Latex file. My current methodology is:
contourf(x,y,v_mag,20), axis([0,width,0,height]),daspect('manual') ;
grid off
colormap jet
h = colorbar;
caxis([0 v_lid])
h.Label.String = 'Velocity Magnitude (m/s)';
set(gcf,'renderer','painters')
export_fig('-painters', '-transparent', 'pdf', 'filename.pdf');
The problem with this method is that it produces artefacts (the white lines) which look like the following:
I understand that these white lines are the polygons defining the shaded areas which have invisible edges, and don't quite overlap (according to here). The problem is caused by the pdf viewer itself which tries to smooth the lines displayed on the screen (according to here). My problem is that most people viewing the document will not know this and will not know how to prevent the viewer doing this. So my questions is:
Is it possible to create a vector graphic of a filled contour plot from Matlab without these artefacts?
Eps produces the same problems. I have tried to use the SVG function but have not had any luck. I am trying to avoid using raster graphics due to the pixelation caused by zooming in. Any advice would be much appreciated.
EDIT - Additional info - Using Matlab v.2014b and Ghostscript v.9.15
This is an extremely frustrating issue for which there seems to be no solution (or even, few attempts at a solution), and it has been many years now. In summary, Matlab cannot cope with outputting artefact-free contour or surface plots (anything with complicated meshes or transparencies).
I can suggest a simple workaround that will work in most cases, where the colours or details of the underlying contour plot do not need to be preserved perfectly.
Output a version of the figure without lines in png format with high enough resolution.
Output a version of the figure without colours in pdf format. This should be free of any artefacts. If your figure it complicated and has many transparencies, you may need to output multiple versions building up the 'levels'.
Use Adobe Illustrator (or some equivalent) to perform a vectorized trace of the raster image. You may lose some detail here, but for simple contour plots with limited details, it will be converted easily to vectorized form.
Overlay the two images within Illustrator. Output in vector format.
This also allows you to use things like Illustrator's ability to compress pdfs.
If you don't want to toy with vectorizing the raster output, you can also simply replace steps 3-4 and combine a raster colour image with a vectorized line image. This would work well for complicated contour plots giving you crisp lines, but the ability to compress the underlying colours.
Eventually, MatLab 2013b doesn't have this problem. Furthermore the files it produces has much less volume. That is because MatLab 2013b composes vectorized image of big overlapping figures, while MatLab 2014b makes that awful meshing.
Here the first file was got with 2013b and the second with MatLab 2014b (I highlighted one of the polygons with red stroke to show the difference). The volumes differ in approximately 22 times (38 Kb vs. 844 Kb).
So it is not the viewer problem, it's how the image is exported from MatLab.
The issue is also discussed here Triangular split patches with painters renderer in MATLAB 2014b and above, but still no direct solution.
I'm writing a MATLAB script which solves for the eigenmodes of a defined polygon. MATLAB's PDE toolbox lets me define the geometry using the command pdepoly() but I need to export the geometry description matrix manually to the workspace through the GUI before I can decompose, mesh, and solve the pde. Does anyone know either a command to export the geometry to the workspace or a better way to define this geometry description matrix in MATLAB?
Many Thanks
I am a little confused about what you are trying to do. pdepoly(x,y) expects two vectors x and y already, so perhaps you can simultaneously return those vectors instead of trying to extract them again from the geometry created by pdepoly.
If you are trying to export the geometry from MATLAB so that you can use it elsewhere check this documentation out:
[After calling pdepoly(x,y) t]he state of the Geometry Description matrix inside pdetool is updated to include the polygon. You can export the Geometry Description matrix from pdetool by using the Export Geometry Description option from the Draw menu.
That seems to sound like what you are up to. Best of luck!