Matlab

plot 3d from matrix2d
Hello, i would like to make plot3d from my matrix. The x and y are positions and the elements of matrix are heights: I would like to present results as a bar charts like example below. http://yfrog.com/86rysunek1jj Thanks for any advice. Regards, ZacAdi ... 16 Jul 2010 09:53

optimization demonstration
Hi there, I'm preparing a slide deck to demonstrate a nonlinear optimization to some non-technical folks. I wanted to show them an animation of a simple optimization on a bowled surface on a 3d plot, showing the iterative solutions, gradients, new search directions, etc. Anyone ever make anything like that? If so... 15 Jul 2010 16:30

make markers transparency
Has anyone found a solution to assigning a transparency level to a marker with a face color? I am trying to plot markers on a map of the continental US. % Plot conus shape file ax = usamap('conus'); states = shaperead('usastatelo', 'UseGeoCoords', true, 'Selector',... {@(name) ~any(strcmp(name,{'Alaska','H... 18 Jul 2010 11:36

modifying x-axis values for bar3
Hi, I'm trying to plot about 20 bar histograms. However, there doesn't seem to be an option to specify the x-axis value for each histogram (for instance, the x-axis will be 1-20). However, I want it so that each histogram corresponds with a certain value (for instance, mapping 1-20 to 0-1). Is there a way to do this... 15 Jul 2010 15:23

create excel plot with MATLAB?
I have written a script which looks in a directory, calls up appropriate files, and analyzes them all one at a time with a for loop. It takes data from an excel file, manipulates it, and saves it to a new excel file. I need an excel plot as well as the data in the new excel file... is there a way to have excel create ... 15 Jul 2010 16:30

matlab code for energy detection spectrum sensing in cognitiveradio using AWGN channel
Muhammad wrote: hi there, i am doing a project on collaborative on energy detection in collaborative spectrum sensing in cognitive radio and i have done simulation for independent log normal shadowing and rayleigh fading but in collaborative spectrum sensing rayleigh fading simulation is done but s... 15 Jul 2010 14:17

Symbolics and Anonymous Functions - indefinite number of symbolicvariables and making an anonymous function of them
Carolyn wrote: case 4 g_anon = @(vec) [g{1}(vec) g{2}(vec) g{3}(vec) g{4}(vec)]; This might replace the complete switch and so on: g_anon = @(vec) cellfun(@(G) G(vec), g); ... 15 Jul 2010 14:17

Regarding getting pixel information of cursor
Hi guys, I wanted to know if there is any way to get the rgb values at the cursor location on the screen in real time without us loading the image on our workspace? What I mean is that is there a way to get the rgb values of the wallpaper or image online displayed on computer without us actually loading the image ... 15 Jul 2010 14:17

Help Steepest Descent
Hi, I'm working with MatLab since just 2 months and I need to do a Steepest Descent in my data. The problem is that my data is not a function, but a Matrix (MAT-file). And all the help that I found is to functions.... Some idea?? Thanks in advance, Susana ... 21 Jul 2010 14:43

Importing csv file - only two (not 12) columns appear
I am using the 'file' 'import' to load a csv file into MATLAB. However only two columns appear in MATLAB when the csv file has 12 columns. Can anyone suggest what I need to do in a fairly simple way please? Thanks ... 15 Jul 2010 16:30