count columns with same value/string for each row in r

Question

Say my data(imaginary) ,a data frame is as follows :

 > head(data)
                       mpg_H cyl_G disp_G  
    Mazda RX4         TRUE   TRUE     TRUE              


        

Answer 1

You can use apply and sum.

df$count_TRUE <- apply(df, 1,sum); 
df$count_FALSE <- (ncol(df)-1)-df$count_TRUE;