Hello
Is it possible to get summary statistics (inc mean, sd etc) from a
text file that has the following info stored in it?
Height Frequency
123 5
124 8
125 3
126 9
127 7
etc etc
What about using read.table() and applying summary() on the result?
Uwe Ligges
On 22.02.2011 13:20, Daniel Harris wrote:
Hello
Is it possible to get summary statistics (inc mean, sd etc) from a
text file that has the following info stored in it?
Height Frequency
123
Daniel, how is the data stored? The answer to your question may be as
simple as
df - read.csv(filename.csv)
summary(df)
See ?read.csv for info on reading various file formats.
HTH, Bryan
Prof. Bryan Hanson
Dept of Chemistry Biochemistry
DePauw University
602 S. College
Thanks for the replies
The file is below
Height Frequency
62 3
63 20
64 24
65 40
66 85
67 122
68 139
69 179
70 139
71 107
72 55
73 47
74 22
75 12
76 5
77 1
I use the following
data - read.table(file,header=T)
On 2011-02-22 08:10, Daniel Harris wrote:
Thanks for the replies
The file is below
Height Frequency
62 3
63 20
64 24
65 40
66 85
67 122
68 139
69 179
70 139
71 107
72 55
73 47
74 22
75 12
76 5
77 1
I use the
The first column gives the answer that I am looking for but I just
thought their maybe a better way without using the long variable
Sounds like you want the frequency-weighted summary statistics.
For the mean, look at ?weighted.mean.
For more comprehensive stats, check ?wtd.mean in the Hmisc
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