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I am developing an application in R shiny and I would like to make a graph dynamic by adding points, error bar, and lines using the ggplot2 package R. 

The columns of my dataframes have no names because I merge Excel files uploaded by the user using R, so the dataframes depend on how many files the user uploads. This also affects the ggplot. 

But I know the number of columns that separate the data I have to use in my dataframe so I created dynamic variables named y, k, and z that increment each time for the choice of the right columns in the respective dataframes. 

I found this code and I adapted it to my code but I have the following errors

Error in check_required_aesthetics: geom_line requires the following missing aesthetics: y

Error in check_aesthetics: Aesthetics must be either length 1 or the same as the data (57): ymin and ymax

What I have tried:

    p <- ggplot(data=df, aes(x=df[,1], y=df[,2])) + labs(x="deltaExWL (nm)",y="CSM")

    for(i in 1:input$nberspl_one){
      p <- p + geom_point(aes(x=df[,1], y= df[,y+2]), color = "blue")+
              geom_errorbar(aes(ymin= df[,y+2] - df[,y+3], ymax= df[,y+2] + df[,y+3] ), color = "blue")+
              geom_line(data=df_fitted, aes(x=df_fitted[,1], y = df_fitted[,k+3]), color = "blue")

      z<- z+1
      y<- y+3
      k<- k+4

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