How can I plot matrix locations on top of corresponding matrix elements?

Hi,

I have a set of 20 matrix locations (elements) which have their subscript indices stored as "xpossav" and "ypossav". These correspond to rows and columns of a matrix, C, respectively. These "coordinates" are simulated location points of a movement trajectory. I want to plot these coordinates on top of the elements in the matrix C that the coordinates correspond to. I know that matrices are indexed (rows, columns), so equivalent plotting would be (y,x). Below is the code I have used to create a plot of the coordinates, so that I can visualize the trajectory:

plot(ypossav,(size(C,1)-xpossav),'-o'),xlabel('X'),ylabel('Y'), title('Trajectory')

This works in plotting the locations correctly. I then want to display the subset of the matrix that corresponds to the locations. For example, the point for location xpossav=1,ypossav=1 should be shown on top of element (1,1) of matrix C. Is there a way to do this? I have tried different approaches, but can only achieve to plot the locations separately from the corresponding matrix subset.

[dpb]

" the point for location xpossav=1,ypossav=1 should be shown on top of element (1,1) of matrix C."

I really don't understand what the above means, sorry. Can you attach a figure that shows what you envision this should look like even if have to sketch it with (gasp!) pencil and paper so we can visualize what your output would be?

It wouldn't hurt to attach the data so folks can also duplicate it w/o trying to fabricate data. The C matrix, if large, can be obtained for the points in question simply by

Cset=C(xpossav,ypossav);

if I follow your description of what the two vectors are.

[Stephanie Diaz]

Hi @dpb,

I've attached the set of points produced, disregard the polygon around the points. I'm not sure if I'm describing this well, but the points correspond to the "matrix_subset" figure attached, which is actually a small section of "matrix_C"(somewhere in the top left corner. I just want the plot of the points to overlay the matrix subset that they correspond to, so that each point should be in the center of one pixel from the subset. Maybe it helps to mention that the matrix is the section of the landscape and the points are locations on the landscape. So, the matrix subset is the section containing the points' locations. Something like the the "nc_coyote_homerange" attached depicts, where the locations are overlaid on top of the actual landscape.

[Stephanie Diaz]

@dpb please let me know if you can open the attachments!

[dpb]

Well, I could read them as .mat files but then not sure precisely what to try to do with them. If they're figures intended to show the way you'd like to present the data, use the 'File' and 'SaveAs' to save them as .jpg then attach the images and we can see them here.

[Stephanie Diaz]

Hi @dpb ,

I have attached them as image files. The "points3" files are the coordinates, the "matrix subset2" files is the part of the larger matrix that these points correspond to, and "matrix_C2" is the larger matrix. "Plot" is more of what I would like the plotting to look like, basically points overlaid on their location on a map. My map is essentially the matrix subset.