RGB to YUV format

Converts an image in RGB to YUV with 4:2:2 chroma sampling

The function rgb2yuv converts the RGB matrix of an image to an YUV format matrix for the image. It plots the images, if Plot Flag is equal to 1.
It uses the RGB conversion formula available in Wikipedia. It gives the YUV format in 4:2:2 chroma sampling
Example
file=('<image file path>');
plotflag=1;
RGB = imread(file);
imshow(RGB);
YUV=rgb2yuv(RGB,plot_flag);

Author:Santhana Raj.A
https://sites.google.com/site/santhanarajarunachalam/