Agreement on programming languages popularity between TIOBE and r/programming

The r/programming study question about "used languages in the previous 12 months" can be investigated together with the 50 most popular programming languages described by TIOBE (in November 2011).

The figure below shows the degree of correspondence in terms of rank order correlation. For TIOBE's top 50 languages, the correlation was .57 whereas it was slightly higher for the top 25 languages of TIOBE (.62).

Rank order correspondence between TIOBE top 50 and the r/programming survey

The correlations are based on the table below, which has been compiled somewhat hastily. Observations with tied ranks use the mean rank of the tied observations. More detailed analysis about program language use in the survey can be found here and here.

Language	TIOBE rank	TIOBE percentage	r/programming rank
Java	1	17.87 %	4
C	2	17.32 %	2
C++	3	8.08 %	6
C#	4	7.32 %	7
PHP	5	6.10 %	8
Objective-C	6	5.98 %	14
(Visual) Basic	7	5.04 %	22
Python	8	3.62 %	3
JavaScript	9	2.57 %	1
Perl	10	2.08 %	15
Ruby	11	1.50 %	9
PL/SQL	12	1.44 %	16
Lisp	13	1.18 %	18
Pascal	14	0.99 %	55
MATLAB	15	0.96 %	20
Delphi/Object Pascal	16	0.87 %	37
ABAP	17	0.85 %	62.5
Lua	18	0.64 %	21
Ada	19	0.62 %	45
RPG (OS/400)	20	0.62 %	62.5
Logo	21	0.59 %	85.5
Transact-SQL	22	0.55 %	17
Visual Basic .NET	23	0.53 %	28
Assembly	24	0.53 %	11
COBOL	25	0.52 %	51.5
Scratch	26	0.52 %	56
R	27	0.50 %	26
Scheme	28	0.45 %	23
NXT-G	29	0.45 %	96.5
Fortran	30	0.44 %	42
ActionScript	31	0.41 %	19
Erlang	32	0.40 %	30
VHDL	33	0.40 %	44
C shell	34	0.39 %	35
SAS	35	0.39 %	60
Go	36	0.36 %	32
Prolog	37	0.35 %	38
Forth	38	0.33 %	67.5
D	39	0.32 %	36
Haskell	40	0.31 %	12
APL	41	0.28 %	74.5
Tcl	42	0.26 %	43
Smalltalk	43	0.26 %	48
ML	44	0.26 %	41
Ladder Logic	45	0.25 %	74.5
Awk	46	0.25 %	10
PL/I	47	0.24 %	96.5
Alice	48	0.23 %	62.5
F#	49	0.23 %	34
Q	50	0.22 %	74.5