10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
I want to add the sequence length of File_1.fa and File _2.fa to form the form the fifth column in File_1_pos.txt and File_2_poa.txt respectively using awk and bash. Can anyone help me? Thanks
Get sequence length of each file
File_1.fa
File_2.fa
Add the sequence length to be the third... (6 Replies)
Discussion started by: Ibk
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2. UNIX for Dummies Questions & Answers
Hi there, shameful Linux Newbie here :p
I was wondering if you could help with my problem...
I have plenty of files I'd like to concatenate. I know how to basically use cat command but that won't be enough from what I need : excluding the last xx bytes from files before assembling since there's... (4 Replies)
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3. Shell Programming and Scripting
I have 3 files
File1
C1 C2 c3
File 2
C1 c2 c3
File 3
C1 c2 c3
Now i want to have
File1 as C1 c2 c3 I
File2 as C1 c2 c3 O
File3 as c1 c2 c3 D
and these 3 files should be concatenated into a single file
how can it be done in unix script? (3 Replies)
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Hi,
I have a unix file with the below structure -
CustId1 CustName1 CustPhn1 /u/home/xmldata/A000001
CustId2 CustName2 CustPhn2 /u/home/xmldata/A000002
CustId3 CustName3 CustPhn3 /u/home/xmldata/A000003
Then I have another unix directory /u/home/xmldata
This directory has... (3 Replies)
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5. Shell Programming and Scripting
Hi
This is a simple one but I got a lost in translation when doing.
What I want to do, given both variables in the example below, to get one value at the time from both variables, for example:
1:a
2:b
etc...
I need to get this in bash scripting
code:
varas="1 2 3 4"
varbs="a b c d"... (4 Replies)
Discussion started by: ranmanh
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6. Shell Programming and Scripting
I have the following script in a shell
# The start of a filename
file=$(ls -tr $EMT*.dat | tail -1) # Select the latest file echo $file
file_seq=$( < /u02/sct/banner/bandev2/xxxxxx/misc/EFTSQL.dat)
echo $file_seq
file2 = '$file_seq + 1'
echo $file2
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7. Shell Programming and Scripting
I want o add a variable in addition to a file which will be send with sendmail. I have problems to find the correct syntax for concatenating this variable called $MyVariable.
sendmail mai@domain.com </tmp/errormessage.txt $MyVariable]
Thanks for your help! (2 Replies)
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8. Shell Programming and Scripting
Hi,
I have a table in Db2 with data say
id_1 phase1
id_1 phase2
id_1 phase3
id_2 phase1
id_2 phase2
I need to concatenate the values like
id_1 phase1,phase2,phase3
id_2 phase1,phase2
I tried recursive query but in vain as the length of string to be concatenated in quite long. ... (17 Replies)
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Hi All,
I want to concatenate the array cell values and form a string.. Is it possible?
for ex.
I have an array
word_array contains d u m b and after concatenating the string shld be 'dumb'
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10. Shell Programming and Scripting
hi
My requirement is i have a file with some records like this
file name ::xyz
a=1
b=100,200
,300,400
,500,600
c=700,800
d=900
i want to change my file
a=1
b=100,200,300,400
c=700,800
d=900
if record starts with " , " that line should fallows the previous line.please give... (6 Replies)
Discussion started by: srivsn
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RRDGRAPH_DATA(1) rrdtool RRDGRAPH_DATA(1)
NAME
rrdgraph_data - preparing data for graphing in rrdtool graph
SYNOPSIS
DEF:<vname>=<rrdfile>:<ds-name>:<CF>[:step=<step>][:start=<time>][:end=<time>][:reduce=<CF>]
VDEF:vname=RPN expression
CDEF:vname=RPN expression
DESCRIPTION
These three instructions extract data values out of the RRD files, optionally altering them (think, for example, of a bytes to bits
conversion). If so desired, you can also define variables containing useful information such as maximum, minimum etcetera. Two of the
instructions use a language called RPN which is described in its own manual page.
Variable names (vname) must be made up strings of the following characters "A-Z, a-z, 0-9, -,_" and a maximum length of 255 characters.
When picking variable names, make sure you do not choose a name that is already taken by an RPN operator. A safe bet it to use lowercase or
mixed case names for variables since operators will always be in uppercase.
DEF
DEF:<vname>=<rrdfile>:<ds-name>:<CF>[:step=<step>][:start=<time>][:end=<time>][:reduce=<CF>]
This command fetches data from an RRD file. The virtual name vname can then be used throughout the rest of the script. By default, an RRA
which contains the correct consolidated data at an appropriate resolution will be chosen. The resolution can be overridden with the --step
option. The resolution can again be overridden by specifying the step size. The time span of this data is the same as for the graph by
default, you can override this by specifying start and end. Remember to escape colons in the time specification!
If the resolution of the data is higher than the resolution of the graph, the data will be further consolidated. This may result in a graph
that spans slightly more time than requested. Ideally each point in the graph should correspond with one CDP from an RRA. For instance,
if your RRD has an RRA with a resolution of 1800 seconds per CDP, you should create an image with width 400 and time span 400*1800 seconds
(use appropriate start and end times, such as "--start end-8days8hours").
If consolidation needs to be done, the CF of the RRA specified in the DEF itself will be used to reduce the data density. This behavior can
be changed using ":reduce=<CF>". This optional parameter specifies the CF to use during the data reduction phase.
Example:
DEF:ds0=router.rrd:ds0:AVERAGE
DEF:ds0weekly=router.rrd:ds0:AVERAGE:step=7200
DEF:ds0weekly=router.rrd:ds0:AVERAGE:start=end-1h
DEF:ds0weekly=router.rrd:ds0:AVERAGE:start=11:00:end=start+1h
VDEF
VDEF:vname=RPN expression
This command returns a value and/or a time according to the RPN statements used. The resulting vname will, depending on the functions used,
have a value and a time component. When you use this vname in another RPN expression, you are effectively inserting its value just as if
you had put a number at that place. The variable can also be used in the various graph and print elements.
Example: "VDEF:avg=mydata,AVERAGE"
Note that currently only aggregation functions work in VDEF rpn expressions. Patches to change this are welcome.
CDEF
CDEF:vname=RPN expression
This command creates a new set of data points (in memory only, not in the RRD file) out of one or more other data series. The RPN
instructions are used to evaluate a mathematical function on each data point. The resulting vname can then be used further on in the
script, just as if it were generated by a DEF instruction.
Example: "CDEF:mydatabits=mydata,8,*"
About CDEF versus VDEF
At some point in processing, RRDtool has gathered an array of rates ready to display.
CDEF works on such an array. For example, CDEF:new=ds0,8,* would multiply each of the array members by eight (probably transforming bytes
into bits). The result is an array containing the new values.
VDEF also works on such an array but in a different way. For example, VDEF:max=ds0,MAXIMUM would scan each of the array members and store
the maximum value.
When do you use VDEF versus CDEF?
Use CDEF to transform your data prior to graphing. In the above example, we'd use a CDEF to transform bytes to bits before graphing the
bits.
You use a VDEF if you want max(1,5,3,2,4) to return five which would be displayed in the graph's legend (to answer, what was the maximum
value during the graph period).
If you want to apply 'complex' operations to the result of a VDEF you have to use a CDEF again since VDEFs only look like RPN expressions,
they aren't really.
SEE ALSO
rrdgraph gives an overview of how rrdtool graph works. rrdgraph_data describes DEF,CDEF and VDEF in detail. rrdgraph_rpn describes the
RPN language used in the ?DEF statements. rrdgraph_graph page describes all of the graph and print functions.
Make sure to read rrdgraph_examples for tips&tricks.
AUTHOR
Program by Tobias Oetiker <tobi@oetiker.ch>
This manual page by Alex van den Bogaerdt <alex@vandenbogaerdt.nl> with corrections and/or additions by several people
1.4.7 2009-10-14 RRDGRAPH_DATA(1)