Let's say this is my data frame:
df
a b c d e f g h i j k l ll m n o p q r
1 Dxa8 Dxa8 0 Dxa8 Dxa8 0 Dxa8 Dxa8 0 0 0 0 0 0.00 0 0 0 Dxc8 0
2 Dxb8 Dxc8 0 Dxe8 Dxi8 0 tneg tpos 0 0 0 0 0 0.03 0 0 0 Dxi8 0
And I want rows where m is not zero. The resulting data frame should only have row 2.
Here's what I've tried:
nzg = df[, !apply(df$m == 0, 2,all)] # dim(x) must have a positive length
nzg = df[,-df$m==0] # undefined columns specified
As well as many variants. I'm sure it's really easy, I'm just rusty, and all the other examples are for more complex situations.
