[R] ttest in R

[1Rnwb]

Dear list, 

i am a biologist who needs to do some ttest between disease and non disease,
sex, genotype and the serum levels of proteins on a large number of
individuals. i have been using excel for a long time but it is very tedious
and time consuming. i am posting the data below and ask your help in
generating a code to get this analysis done in R. thanks

gender	disease	genotype	data
M	N	CC	3.206447188
F	N	CC	8.2
M	N	CC	15.78908629
M	N	CC	21.14311843
F	N	CC	21.48413647
M	N	CC	30.08028842
M	N	CC	30.11455009
F	N	CC	32.41258845
F	N	CT	6622.253065
M	N	CT	6763.6
M	N	CT	7342.023209
F	N	CT	7617.7
F	N	CT	7857.3
M	N	CT	8027.78692
F	N	CT	8755.950438
M	N	CT	9007.7
F	N	CT	9157.76987
M	N	CT	9398.270953
F	N	CT	9710.083037
F	N	CT	9896.887277
M	N	CT	10082.60082
F	N	CT	10137.05244
F	N	CT	10350.76186
M	N	CT	14629.34508
F	N	TT	4.614829254
F	N	TT	5.223593964
F	N	TT	6.7
M	N	TT	6.7
M	N	TT	7.735287229
F	N	TT	13.68084134
F	N	TT	14.5
M	N	TT	15.3
M	N	TT	16.16826703
M	N	TT	19.8
M	N	TT	24.51271254
M	N	TT	29.92459383
F	N	TT	30.3993842
M	N	TT	30.57161207
F	N	TT	30.72031553
F	N	TT	31.8
F	N	TT	34.72409961
M	N	TT	37
F	N	TT	38.94507607
M	N	TT	39.1
M	N	TT	40.9
M	N	TT	41.5
F	N	TT	42.36614019
F	Y	CC	338.2166757
M	Y	CC	345.8711007
M	Y	CC	347.4659528
F	Y	CC	356.3
F	Y	CC	358.4
F	Y	CC	360.184259
F	Y	CC	453.8
F	Y	CC	573.7342373
M	Y	CC	962.1232959
F	Y	CC	1055.9
F	Y	CC	1309.532621
F	Y	CC	2798.6
F	Y	CC	3568.794326
M	Y	CT	1.227348206
F	Y	CT	2.061944986
F	Y	CT	2.245592643
M	Y	CT	2.454696412
M	Y	CT	2.456716738
M	Y	CT	4.318447391
M	Y	CT	4.503098245
M	Y	CT	5.873088452
M	Y	CT	7.106930564
F	Y	CT	7.7
M	Y	CT	10.83537709
M	Y	CT	11.4
M	Y	CT	12.1
M	Y	CT	12.62002743
M	Y	CT	13.6
F	Y	CT	13.7
F	Y	CT	14.35562171
F	Y	CT	15.9
F	Y	TT	986.6755719
F	Y	TT	1206.475083
F	Y	TT	1237.9
M	Y	TT	1254.5
F	Y	TT	1303.6
F	Y	TT	1573.915019
M	Y	TT	1756.8
M	Y	TT	1895
M	Y	TT	2126.766565
F	Y	TT	2149.512866
M	Y	TT	3249.449945
F	Y	TT	6999.3
M	Y	TT	7172.479241
M	Y	TT	8268.909251
M	Y	TT	8544.229671

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