[R] simple question on intervals

Hi, I have a number (correlation coefficient) x in [-1,1], and a color palette col-grey(1:N/N) for a given N. I want to assign a color from col to x which corresponds to x in levels of cut(-1:1,N). So for N-4 and x-0.3, the color should be col[3]. For N-4 and x--0.8, the color should be

Re: [R] simple question on intervals

I have a number (correlation coefficient) x in [-1,1], and a color palette col-grey(1:N/N) for a given N. I want to assign a color from col to x which corresponds to x in levels of cut(-1:1,N). So for N-4 and x-0.3, the color should be col[3]. For N-4 and x--0.8, the color should be col[1], etc.