为什么我是我的测定变量，但无法识别

Question

我正在按以下步骤传递面板标签以应用于ggplot：

 pls <- data.frame(assay = factor(c('spike_manual_igg','rbd_manual_igg','np_manual_igg',
                        'spike_rob_igg','rbd_rob_igg','np_rob_igg',
                        'spike_rob_iga','rbd_rob_iga','np_rob_iga',
                        'np_rob_igm', 'rbd_rob_igm', 'spike_rob_igm'),
                  levels=c('spike_manual_igg','rbd_manual_igg','np_manual_igg',
                        'spike_rob_igg','rbd_rob_igg','np_rob_igg',
                        'spike_rob_iga','rbd_rob_iga','np_rob_iga',
                        'np_rob_igm', 'rbd_rob_igm', 'spike_rob_igm')),
                      y = rep(Inf,8),
                      x = rep(2,8),
                      hjustvar = rep(0,8) ,
                      vjustvar = rep(1.1,8),
                      mylab = c("A","B","C","D","E","F","G","H","I", "J", "K", "L"))

但我是此错误消息，

data.frame（assay = factor（c（“ spike_manual_igg”，“ rbd_manual_igg”，： 参数暗示不同的行数：12，8