[BioC] How to convert multipe tables into one table in a dataframe

[taj [guest]]

Anyone can help me in managing a dataframe?
I have data (.txt) like this (2 tables with one title, 4 columns and 2 rows per table):
group 1	num: 3		
a	b	c	d
1	2	3	4
6	7	8	9
			
group 2 	num: 5		
a	b	c	d
4	6	8	10
2	12	6	14


And I want to combine these tables in a dataframe ( in a table with 6 columns and 4 rows) as follow:
group	num	a	b	c	d
1	3	1	2	3	4
1	3	6	7	8	9
2	5	4	6	8	10
2	5	2	12	6	14

Thanks in advance,



 -- output of sessionInfo(): 

group	num	a	b	c	d
1	3	1	2	3	4
1	3	6	7	8	9
2	5	4	6	8	10
2	5	2	12	6	14



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