[R] please Help me on a repeated measures anova

soileil soileil at msn.com
Wed Dec 22 00:10:46 CET 2010


I currently work on a draft of an aquatic bioassessment. The conditions
tested are the following: ER river water T dechlorinated water control 0.5 +
0.5mg / L of malate T + 1 dechlorinated water control + 1g / L of malate T
ED dechlorinated water control SED + ER + river water sediment SED ED +
sediment + water dechlorinated. It is the result of AChE in muscle (fillet
of fish). The production of acetylcholine is followed with a
spectrophotometer every 15 seconds for two minutes. The results are
presented in the following table:


traitement t15 t30 t45 t60 t75 t90 t105 t120
ER 0.100 0.110 0.123 0.135 0.147 0.159 0.171 0.182
ER 0.112 0.134 0.153 0.174 0.192 0.208 0.226 0.251
T+0.5 0.078 0.082 0.088 0.094 0.101 0.108 0.113 0.120
t+0.5 0.053 0.100 0.109 0.120 0.127 0.136 0.145 0.154
TED 0.107 0.126 0.141 0.161 0.172 0.184 0.200 0.213
TED 0.117 0.135 0.153 0.169 0.183 0.201 0.218 0.229
TED 0.124 0.145 0.163 0.187 0.208 0.227 0.244 0.259
T+1 0.109 0.119 0.134 0.148 0.163 0.174 0.187 0.202
T+1 0.118 0.134 0.153 0.170 0.184 0.197 0.214 0.228
SED+ER 0.158 0.175 0.194 0.208 0.226 0.240 0.259 0.268
SED+ED 0.119 0.140 0.157 0.174 0.192 0.208 0.225 0.240
SED+ED 0.101 0.113 0.180 0.140 0.154 0.166 0.179 0.190
SED+ED 0.129 0.135 0.140 0.146 0.153 0.159 0.165 0.172


The statistical test is considered a repeated measures anova but I do not
know how to do it in R. I watched the forums and I downloaded the R package
'nlme' by which I should be able to use the function 'lm'. But the problem
is that I can not encode this function. Could you help me?
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