Dear gurus,

I encountered the following error when attempting to read an avi movie.  Is
it because I did not use the loop to read each frame? I seek your help in
rectifying the following error. Thank you very much.
vd = mmreader('test3.avi');
gray = rgb2gray(vd);
??? Error using ==> rgb2gray>parse_inputs at 82
MAP must be a m x 3 array.
Error in ==> rgb2gray at 35
X = parse_inputs(varargin{:});

Hello Matlab group members
I have a small doubt, which I tried my level best to find out. failed. Now if some of you can
help me I woul be very thankful for that.
 
In the plot file if I could do the the following.
1.  data x1(n),y1(n) ;  data x2(n),y2(n) ; data x3(n),y3(n) ;  
 
2.  A  polynomial fit along these three  data set with a different color lines
3. legend of the data  within a box
 
Now I wanted to put error bars to show the error in estimation of the data.
errorbar(x,y,e) can do the errors only I hope, but I have these 3 sets of data and the fits
along them.
 
Thanking you 
 
With best regards
 
Dr. Shahin. Thayyil
Department of Physics
University of Pisa, Italy.