[R] Creating a year-month indicator and groupby with category

[Tariq Khasiri]

Hello,

I have the following data. I want to show in a line plot how each different
company is earning over the timeline of my data sample.

I'm not sure how I can create the *year-month indicator* to plot it nicely
in my horizontal axis out of my dataset.

After creating the *year-month* indicator ( which will be in my x axis) I
want to create a dataframe where I can groupby companies over the
year-month indicator by putting *share *in the y axis as variables.

### data is like the following

dput(dat)
structure(list(year = c(2018, 2019, 2019, 2019, 2019, 2019, 2019,
2019, 2017, 2017, 2017, 2017, 2017, 2017, 2017, 2017, 2017, 2017,
2017, 2017, 2018, 2018, 2018, 2018, 2018, 2018, 2018, 2018, 2018,
2018, 2018, 2018, 2019, 2019, 2019, 2019, 2019), month = c(12,
1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1,
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1, 2, 3, 4, 5), company = c("ABC",
"ABC", "ABC", "ABC", "ABC", "ABC", "ABC", "ABC", "FGH", "FGH",
"FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH",
"FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH",
"FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH", "FGH"
), share = c(20, 16.5, 15, 15.5, 15.5, 16, 17, 16.5, 61, 55,
53, 53, 54, 53, 58, 54, 50, 47, 55, 50, 52, 51, 51.5, 52, 53,
54, 55, 53, 54, 50, 42, 48, 41, 40, 39, 36.5, 35), com_name = c(1,
1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2)), row.names = c(NA,
-37L), spec = structure(list(cols = list(year = structure(list(), class =
c("collector_double",
"collector")), month = structure(list(), class = c("collector_double",
"collector")), company = structure(list(), class = c("collector_character",
"collector")), share = structure(list(), class = c("collector_double",
"collector")), com_name = structure(list(), class = c("collector_double",
"collector"))), default = structure(list(), class = c("collector_guess",
"collector")), delim = ","), class = "col_spec"), problems = <pointer:
0x7fd732028680>, class = c("spec_tbl_df",
"tbl_df", "tbl", "data.frame"))

	[[alternative HTML version deleted]]