DF3 <- merge(DF1, DF2, by=c("Sample_id", "RepairHours), all.y=T)
DF3$subtract <- DF3$Day_0_Read1-DF3$ ZeroMean
Nikhil Kaza
Asst. Professor,
City and Regional Planning
University of North Carolina
nikhil.l...@gmail.com
On Sep 14, 2010, at 8:38 AM, rasanpreet wrote:
hi guys..please help me with this
i am working on two data frames
one goes like this:
DF1
Sample_id RepairHours Denatured Dose ZeroMean FourtyFiveMean
NinetyMean
1 SDM071 0 1 B 60.5
19.0 45.0
2 SDM071 1 1 B 46.0
23.0 42.5
3 SDM071 2 1 B 52.5
24.0 40.0
4 SDM071 3 1 B 42.0
21.5 45.0
5 SDM053 0 1 B 66.5
28.5 56.5
6 SDM053 1 1 B 47.0
29.0 47.5
7 SDM053 2 1 B 52.0
31.0 44.0
8 SDM053 3 1 B 36.0
34.0 41.5
9 SDM059 0 1 B 47.5
41.5 29.0
10 SDM059 1 1 B 47.0
36.0 35.0
11 SDM059 2 1 B 41.5
42.0 32.5
12 SDM059 3 1 B 46.5
41.5 32.0
and the other one:
DF2
SampleId RepairHours Denatured Dose_uM Day_0_Read1 Day_0_Read2
Day_45_Read1
8 SDM071 0 1 C 124 120
108
9 SDM071 0 1 25 123 128
77
10 SDM071 0 1 50 132 138
79
11 SDM071 0 1 100 118 116
68
12 SDM071 0 1 200 125 146
73
20 SDM071 1 1 C 113 117
113
21 SDM071 1 1 25 108 115
132
22 SDM071 1 1 50 105 96
94
23 SDM071 1 1 100 101 101
88
24 SDM071 1 1 200 114 106
89
32 SDM071 2 1 C 143 136
109
33 SDM071 2 1 25 126 147
110
34 SDM071 2 1 50 109 122
107
35 SDM071 2 1 100 114 118
89
36 SDM071 2 1 200 118 128
88
44 SDM071 3 1 C 103 111
116
45 SDM071 3 1 25 108 105
115
46 SDM071 3 1 50 118 99
88
47 SDM071 3 1 100 98 103
105
48 SDM071 3 1 200 112 105
96
56 SDM053 0 1 C 214 208
158
57 SDM053 0 1 25 159 214
178
58 SDM053 0 1 50 170 169
112
59 SDM053 0 1 100 149 158
124
60 SDM053 0 1 200 201 171
115
68 SDM053 1 1 C 149 166
120
69 SDM053 1 1 25 145 134
118
70 SDM053 1 1 50 159 169
130
71 SDM053 1 1 100 113 126
110
72 SDM053 1 1 200 118 112
120
these are just part of the frames......
i have to subtract the first five values of dataframe2 from one
value from
dataframe1
eg: subtract<-DF2$Day_0_Read1-DF1$ ZeroMean
if u notice the repair hours in both have to match...along with
their id's.
i have tried this
zeroday_subtract1=DF1$Day_0_Read1 - DF2[DF1$RepairHours,]$ZeroMean
but it dosent work
please help me with this...i know its basic but i needhelp
thx in advance
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