How to specify ranges for x and y axes to display histogram analysis of image result using 'stem()'?

I am performing histogram analysis for an image. I have used 'stem()' to display the result. In that I have to remove the 1st stem and I have to specify x and y axes ranges as 0 to 260 and 0 to 1000 respectively. Help me to solve this. I have attached the image, code and histogram output here. Please refer it.

Image:

code: I2=imread(a.tif); R=imhist(I2(:,:,1)); figure, stem(R,’r’), title(‘lenaenc red channel’);

OUTPUT: