Hi michael, thanks, but here is more explanations of my questions to have more
help, (also pls have a look at the data below):
Â
Three questions to give more concrete help:
i) Is your data set stored as a matrix or a data.frame
My data is in a data frame
ii) What are you trying to get the mean of -- all variables pooled or of each
variable independently?
Actually I would like to have all the data for either u, v w1 or w2 that are
bigger than75, which then there weâll have new data frame with either u,v, w1
or w2 bigger than 75, doesnât matter x,y,z1 and z2, they will just follow
what ever the results would be (in this new data frame we should still have
x,y,z1,z1,u, v,w1 and w2, but only those with the values of u or v or w1 or w2
that are bigger than 75.
iii) When you say >=75 for all variables, do you mean only use a row
if it's >=75 for each element or just only use the >=75 elements for
each calculation independently.
after we have the new data frame, then I would like to have the mean for x, y,
z1 and z2 (the absolute number, without taking consideration the negative
signs). If possible, Itshould have all the results altogether (mean of x=..,
y=⦠z1=.. and z2= â¦)and not one by one.
Â
Another question, if I would like to create a new data frame with only the
maximum data of x (for example if I have 0.456; -0.456; and many more of this
values as the maximum values of x ,How can I do it ? (withput taking
consideration of the negative signs)
 I hope my questions are clear now.
Thanks in advance,
Yakamu
Michael
Â
x
y
Z1
Z2
u
v
W1
W2
-0.0077
-0.4665
-0.0048
-0.1302
70
26
59
54
-0.0028
-0.0055
0.0026
-0.001
62
42
82
62
-0.0123
0.006
-0.003
0.0029
74
18
83
78
0.0232
0.0367
0.0028
0.0027
65
34
74
78
-0.0075
0.1141
-0.0018
0.0363
63
0
77
69
0.004
-0.0032
0.0036
-0.0156
14
40
70
64
-0.003
-0.0392
-0.006
-0.0212
55
42
63
69
-0.0116
-0.0028
0.0031
0.0209
59
23
69
35
0.0171
-0.0496
-0.0055
0.0118
35
57
73
42
-0.0135
-0.0324
0.0001
0.0004
55
45
57
55
0.0345
0.004
0.0041
0.0079
77
38
57
71
-0.0206
-0.0152
0.003
0.0104
55
30
56
81
-0.0044
0.0343
0.0059
0.0105
74
52
58
75
0.0138
-0.065
0.0016
-0.0064
68
64
70
56
-0.0303
0.0012
-0.009
0.0025
66
32
42
52
-0.0231
0.0379
-0.0006
0.0116
70
49
61
34
0.0305
0.078
-0.0081
-0.0082
83
45
22
18
-0.03
0.0978
0.0118
0.0103
88
25
31
68
0.0072
-0.0019
0.0049
0.0055
79
50
67
71
--- On Wed, 2/1/12, R. Michael Weylandt <michael.weyla...@gmail.com> wrote:
From: R. Michael Weylandt <michael.weyla...@gmail.com>
Subject: Re: [R] how can i calculate the mean of my data which is only bigger
than 75?
To: "Yakamu Yakamu" <iam_yak...@yahoo.com>
Cc: "r-help@r-project.org" <r-help@r-project.org>
Date: Wednesday, February 1, 2012, 12:47 PM
I'm not entirely sure what you mean, but it's likely one of these:
apply(data, 2, function(x) mean(x[x>75]))
mean(data[ apply(data,1, function(x) all(x > 75), ])
mean(data[data>75])
Three questions to give more concrete help:
i) Is your data set stored as a matrix or a data.frame
ii) What are you trying to get the mean of -- all variables pooled or
of each variable independently?
iii) When you say >=75 for all variables, do you mean only use a row
if it's >=75 for each element or just only use the >=75 elements for
each calculation independently.
Michael
[[alternative HTML version deleted]]
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