Ioannis Filippidis

Thank you for this code.

Please note that "close all" is not expected by a user from within a function. Plotting in a specific figure/axes object can be accomplished instead by explicitly opening one and passing the handle to "plot":
fig = figure;
ax = axes('Parent', fig);
plot(ax, ...)

Also "hold on" is interfering with the current settings by the user, if this function is called to add a curve to an existing figure. It would be better to first get the current hold state (if an axes object handle is passed as argument), then change it to "on" in order to add the curve and finally restore it to its original state:
http://www.mathworks.com/matlabcentral/fileexchange/36641-take-restore-hold

The function would benefit if it had arguments, so that the user can plot whichever Cassini curve they prefer.
If arguments are included, then the help text can be more explicit about how the function is used.
Referring to a link for the help text is not the usual practice.

Note also that the provided link is broken.

As a demonstration alternative, the function could plot several curves as it does now, if no arguments are provided, otherwise plot the curve prescribed by the arguments.

Some recent feedback I received suggests that the xml loading error might be caused by a name conflict between the function xml2struct included with the openstreetmap functions and a function with the same name in the MATLAB Bioinformatics toolbox.

My version of the bioinformatics toolbox does not have such a function, however it does have some functions for xml handling, so probably there existed xml2struct function in previous versions.

The Bioinformatics toolbox function (when it exists) can shadow the one included with this software package, depending on their relative placement in the MATLAB path.

Please check if this is the case for you by typing:
which xml2struct
This issue might be fixed in some future version by just renaming xml2struct, although in general it is preferable to maintain original names for files from the file exchange to keep better track of code and avoid duplicates.

Hi Fabio,

Are you sure that xml2struct is in your path? It appears that the file is not loaded correctly, maybe you could check to see the fields of the structure returned, containing the loaded xml.

A minimal example reproducing the issue would help resolve it.

Best,
Ioannis

Hi dan,

The issue is probably that the missing function is not in your path. You can add all the directories of the package to your path by using the :pathtool" command. Please try to see if its working with other plots (which have surfaces).

Apart from this, this software does not yet support scattergroups. I tried the scatter3 help example and although I got no errors, the geometry exported to the u3d file was essentially empty.

The reason is that some checks are performed. If you successfully run the script for a scatter3 plot, it will report that it did not find any surfaces, lines, patches, quivergroups or contourgroups.
It turns out that scatter3 produces hggroups and the quivergroup and contourgroup export functions look for hggroups. However, they then filter them to see if they are quivers or contours. Otherwise nothing is exported.

In the future there are plans to extend the supported plot types. For the moment all these tests aim to avoid cryptic errors caused by unsupported (or untested) plots. Probably the existing functionality does support scatter3 (i.e., they are only points, so the interface to the output functions will be relatively simple, compared to e.g. quiver output, which has to care about many details). But the wrapper for scatter3 is not yet part of the code.

Hi Ioannis,
the pdf output of your manual looks really nice.
Unfortunately, it the script always gives me the following error message:
"Undefined function 'u3d_pre_surface' for
input arguments of type 'double'."
I am using scatter3 to generate the matlab figure. Does the script support this?

Thank you for your nice work!
dan