[R] multiple t-test with different species and treatments

[Lingling Wen]

Dear R users,
I would like to ask for help with the code of multiple t-test. I have a
dataset as followed:
Species Treatment var1 var2 var2 var4 var5 var6
Blue D 0.022620093 0.125079631 0.04522571 0.010105835 0.013418019
1.455646741
Blue D 0.02117295 0.073544277 0.0311234 0.008742305 0.03261776 0.982196898
Blue D 0.021896521 0.112681274 0.05664344 0.013512548 0.032380618
1.777003683
Green D 0.032749726 0.087705198 0.13699174 0.009902168 0.083534492
1.553758965
Green D 0.036468693 0.115829755 0.10941521 0.012139481 0.206929915
2.610557732
Green D 0.043594022 0.062832712 0.12232853 0.015045559 0.111687593
1.99552401
Orange D 0.022617656 0.11465489 0.02882994 0.013304181 0.018175693
1.72075866
Orange D 0.026211773 0.099294867 0.03387876 0.013408254 0.02971197
2.184955376
Orange D 0.032205662 0.057267709 0.03883165 0.007744362 0.026553323
1.27255601
White D 0.041135469 0.085531343 0.06921425 0.011496168 0.010196895
0.573205411
White D 0.045142458 0.111429194 0.03546278 0.009196729 0.009968818
0.748529991
White D 0.031471913 0.050175149 0.05233851 0.011447205 0.010424973
0.92385457
Blue W 0.022222296 0.112334911 0.04080824 0.016064488 0.031047157
0.885523847
Blue W 0.040238733 0.121941307 0.04239768 0.010310538 0.020106944
0.751643349
Blue W 0.031508947 0.131547704 0.05212774 0.015720985 0.013932284
0.881234886
Green W 0.021070032 0.121018603 0.38202466 0.022152283 0.038479532
0.662605036
Green W 0.026562365 0.108269047 0.44028708 0.019344875 0.090798566
0.746330971
Green W 0.02926478 0.084080729 0.32376224 0.012609717 0.097744041
0.969301308
Orange W 0.02456562 0.134535891 0.09135624 0.007701481 0.017310058
0.966322354
Orange W 0.032095541 0.149347595 0.06048885 0.010332579 0.017457175
0.561561725
Orange W 0.039120696 0.141941743 0.02962146 0.005889924 0.017162941
0.502529091
White W 0.033903057 0.061460583 0.0492955 0.012457767 0.029929334 0.70986421
White W 0.033630233 0.115782233 0.02675399 0.021391535 0.023774961
1.176680075
White W 0.030638581 0.065074112 0.03678494 0.014781912 0.03529703
0.805500558
I wanted to perform a t-test between the treatment "D" and "W" of each
species for all of the variables (var1, var2,...).  Could anyone suggest
the packages or code for this analysis?

	[[alternative HTML version deleted]]