How to remove duplicate values in specific column without removing related row - r

Question

Want to remove duplicate values in specific column without deleting the rows related with duplicate column values as below example:
Input
-----
Date Market Quantity
4/2/2018 Indonesia 1000
4/2/2018 Australia 500
4/2/2018 India 300
4/2/2018 USA 500
4/2/2018 Germany 200
5/2/2018 India 400
5/2/2018 Japan 400
5/2/2018 Russia 457
6/2/2018 Austria 260
6/2/2018 Swiss 700
6/2/2018 USA 1200
6/2/2018 Indonesia 400
output
------
Date Market Quantity
4/2/2018 Indonesia 1000
Australia 500
India 300
USA 500
Germany 200
5/2/2018 India 400
Japan 400
Russia 457
6/2/2018 Austria 260
Swiss 700
USA 1200
Indonesia 400
And if possible , how to plot a graph(bar/column) for same output(something like given)?
Sample Graph

Answer 1

I would add this to comments but I don't have rights yet...
I don't think you actually want to change the data, but as a few mentioned in the comments there are easy ways to do that.
If you're just trying to show the multi-dimensional data in plotly and you're just not familiar with the library syntax try the code below...
df <- data.frame(Date = c('2018/04/02','2018/04/02','2018/04/02','2018/04/02','2018/04/02','2018/05/02','2018/05/02','2018/05/02','2018/06/02','2018/06/02','2018/06/02','2018/06/02'),
Market = c('Indonesia','Australia','India','USA','Germany','India','Japan','Russia','Austria','Swiss','USA','Indonesia'),
Quantity = c(1000,500,300,500,200,400,400,457,260,700,1200,400),
stringsAsFactors = F)
plotly::ggplotly(
ggplot2::ggplot(df, ggplot2::aes(x=Market, y=Quantity)) +
ggplot2::geom_col(ggplot2::aes(fill=Market))+
ggplot2::facet_grid(~Date,scale='free_x') +
ggthemes::theme_tufte()
)