exclude WT sequence from seqlogo results

[weipinghh]

Hi,

I have a peptide variant sequences, I want to use seqlogo to visualize the amino acids compositions of each position. But I also want to exclude the WT sequence, I do not know how to achieve that with seqlogo in R. I will be very appreciate if anyone can help me. The WT sequence is GNNRPVYIPQPRPPHPRL. Thank you! Here is my R script in MacOS.

library(ggplot2)
library(ggseqlogo)
library(stringr)
library(ggsci)
library(tidyverse)
header=T
ggseqlogo(as.character(seqlog$seq), method = 'prob') +
theme_bw() +
scale_y_continuous(labels = scales::percent)