View source for Tutorial for Relaxation dispersion analysis r1rho fixed time recorded on varian as sequential spectra

= Intro =
This tutorial presently cover the [http://svn.gna.org/svn/relax/branches/ relax_disp branch].<br>
This branch is under development, for testing it out, you need to use the source code. See [[Installation_linux#Checking_out_a_relax_branch]].

This tutorial is based on the analysis of R1rho data, analysed in a master thesis.

The spectra is not recorded interleaved, but as a series of spectra with experimental changes.

= Preparation =
You want to make a working dir, with different folders

<source lang="text">
peak_lists
spectrometer_data
scripts
</source>

You can create the folders by
<source lang="text">
mkdir peak_lists spectrometer_data scripts
</source>

In the folder '''peak_lists''' should contain SPARKY list in [[SPARKY_list | SPARKY list format]]. <br>
In the folder '''scripts''' we put scripts which help us processing the files. <br>
In the folder '''spectrometer_data''' should be a directory containing directories with all experiments where each directory contain files: '''fid''' and '''procpar''' as the output from recording on Varian.<br>

= Establish file-overview =

== Make file with paths to fid files ==
We make a file list of filepaths to '''fid''' files.
<source lang="bash">
ls -v -d -1 */fid > fid_files.ls
cat fid_files.ls
</source>

== Do something in each directory ==
With the '''fid_files.ls''', we can do ''something'' in each directory. <br>
For example do a list files in each direcory.

<source lang="bash">
set FIDS=`cat fid_files.ls`

foreach I (`seq 1 ${#FIDS}`)
set FID=${FIDS[$I]}; set DIRN=`dirname $FID`
cd $DIRN
ls 
cd ..
end
</source>

== Extract the spectra settings from Varian procpar file ==
Now we want to make a settings file we can read in relax.

<source lang="bash">
set FIDS=`cat fid_files.ls`
set OUT=$PWD/exp_parameters.txt

echo "# DIRN I deltadof2 dpwr2slock ncyc ss sfrq" > $OUT
foreach I (`seq 1 ${#FIDS}`)
set FID=${FIDS[$I]}; set DIRN=`dirname $FID`
cd $DIRN
set deltadof2=`awk '/^deltadof2 /{f=1;next}f{print $2;exit}' procpar`
set dpwr2slock=`awk '/^dpwr2slock /{f=1;next}f{print $2;exit}' procpar`
set ncyc=`awk '/^ncyc /{f=1;next}f{print $2;exit}' procpar`
set ss=`awk '/^ss /{f=1;next}f{print $2;exit}' procpar`
set sfrq=`awk '/^sfrq /{f=1;next}f{print $2;exit}' procpar`
echo "$DIRN $I $deltadof2 $dpwr2slock $ncyc $ss $sfrq" >> $OUT
cd ..
end

cat $OUT
</source>

You can check, if you have repetitions of experiments, by sorting the parameters, and see if they are dublicated.<br>
We do this, by numerical sort columns 3,4 and 5 with the values for "deltadof2, dpwr2slock, ncyc".
<source lang="bash">
sort -b -k 3,3n -k 4,4n -k 5,5n exp_parameters.txt | awk '{print $3, $4, $5}'
</source>

= Spectral process files =
== Copy data ==
We first copy the data
<source lang="bash">
# Copy data
cp -r spectrometer_data spectrometer_data_processed
cd spectrometer_data_processed
</source>

== Change format to NMRPipe ==
<source lang="bash">
set CWD=$PWD
set FIDS=`cat fid_files.ls`
set DIRN=`dirname ${FIDS[1]}`
cd $DIRN
varian
</source>

Now we make a file to convert from binary format of Varian to NMRPipe.
# Now click, 'read parameters', check 'Rance-Kay'
# Remember to set Y-'Observe Freq MHz' to N15
# Remove '''sleep 5''' from the script.
# Click 'Save script' to make '''fid.com''' file, and 'Quit', and run the script.

== Spectral processing ==
This step can be done by following wiki page [[Spectral_processing]].