[R] partial correlation

how can I compute partial correlation there's four variables; income, age, educational level, race. income is indenpendent variable and race is nominal variable I want to calculate partial correlation or semi-partial correlation between income & race help me out... thanks. -- View this messag

[R] using categorical variable in multiple regression

Hello, I wanted to do the multiple regression on categorical predictor data there's variable x1,x2,x3 and x3 is categorical one. so i just used as.factor(x3) and then ran multiple regression is it a good way to do the multiple regression on categorical predictor data? and how can I interpret the es