MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi
Learn moreOpportunities for recent engineering grads.
Apply TodayMATLAB Central > MATLAB Newsreader > what kind of plot ? 

I am newbie in Matlab, and I have to do some analyse, and the result should be a graph. I know what should i get, but i dont know how. Can anybody help me, and say what is this for a plot and how can I make it ? because i havent found anything that looks like this in help... 
Fero: 
Thank you very much, this seems to be what i was looking for, now i realised that i havent my mathematics part good. I think that i have to convert from cartesian to polar coordinates in the next step. I found a way, but not for a matrix. 
Check out cart2pol() and pol2cart(). If that's not what you wanted, 
Thank you for your time, this is not what I was looking for, your advice was good, but i am few hours working on this, and i am not thinking some times :X i dont need to convert it, my code is absolutely bad....i tried it some ways, please if you would be so kind and watch for them, and tell me which way is better or where i do mistakes... 
I have no idea how you got those terms. Where did you get those 
Hi, 
Well I don't know about the numbers. If you say they're good for you 
I hoped, that there is a way how to draw the graph with the axis like in my picture, that there will be the axis from 1 to 1 with x/R and y/R and that it will be possible to draw there this kind of data from the matrix sigma(a,b). 
On May 15, 4:54 pm, "Fero " <secur...@kinanitra.sk> wrote: 
"Fero " <security@kinanitra.sk> wrote in message <iqmo3m$f1j$1@newscl01ah.mathworks.com>... 
"Roger Stafford" wrote in message <iqpp8e$h19$1@newscl01ah.mathworks.com>... 
Thanks, you both helped me a lot, now one last problem i have. The calculation looks good, and the numbers are good, but, there is a very big difference between the biggest and smallest number. Is there a way, how to define the colorbar to draw colours from lets say 0.001 to 0.001 ? To define the interval of tha colorbar ? because the graph gives me a a lot of number that are out of my interval, and then few numbers that i want to see in the graph, so i need to say the colorbar, that i want to draw this specific numbers.... 
On May 16, 12:31 pm, "Fero " <secur...@kinanitra.sk> wrote: 
"Fero " <security@kinanitra.sk> wrote in message <iqmo3m$f1j$1@newscl01ah.mathworks.com>... 
A tag is like a keyword or category label associated with each thread. Tags make it easier for you to find threads of interest.
Anyone can tag a thread. Tags are public and visible to everyone.