Here is the dataframe:

v” J” theor_freq exp_freq delta
3 121 12540.05 12540.05 -0.0061
3 123 12514.11 12514.10 -0.0070
4 121 12453.72 12453.72 -0.0041
4 123 12427.90 12427.90 -0.0047
5 121 12368.11 12368.10 -0.0059
5 123 12342.41 12342.40 -0.0033

I’d like to graph delta across all v” from 0 to 56, and would like to have ticks for every second v”. Here is my code:

p <- ggplot(data = df, aes(x = factor(v''), y = as.numeric(delta),
colour = factor(J''))) +
geom_point(size = 3) +
geom_line() +
geom_hline(yintercept = 0) +
xlab(“v””) +
ylab(“exp-theor”)+
ggtitle(“Before processing”)+
labs(colour = “J””)+
scale_color_manual(values = c(“121” = “black”, “123” = “grey”))+
theme_bw()

And here is a snippet of the graph:

I’ve tried to use functions scale_x_continuous, xlim, scale_x_discrete and none of the options worked like I needed to.