plotting only selected class from multiple CSV files in R (ggplot) -

let's have imported 2(or more) csv files having similar columns. let's have "a", "b" , "class" columns in each of csv files values different. let's suppose dataset in 1 csv file is:

a b class 1 2  2 3  b 4 1  3 7  c 4 5  ..... 

let's 2nd csvs dataset be:

a   b  class 10  20  20  10  c 40  10  b 30  17  14  15  ..... 

and on other csvs..

initially have made ggplots individual csv files using "a" , "b". want plot csv files in single plot using 1 class @ time i.e., let's want plot class csvs in single plot.

i did plot files in single plot want plot class wise..

can 1 tell how can thing?

just join csvs 1 dataframe , subset , plot?

e.g.

csv1 <- read.csv(...) csv2 <- read.csv(...)  bigcsv <- rbind(csv1, csv2) library(ggplot2)  ggplot(subset(bigscv, class == 'a'), aes(...)) + ... 

the key subset(bigcsv, class=='a').

you can use rbind.fill rbind big list of dataframes.