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Hello,
This looks like it is a set of data at various stations, but are
not organized as a grid. I'll show a few Ferret commands to let
you look at what is in the file.
If the station locations were chosen so that they form a grid,
then you could define a grid that corresponds to the station
locations (or in fact define any grid you want to), and use one of
the SCAT2GRID*XY functions to put the temp, salt variables into
the grid. That would mean that you would be ignoring the fact
that the measurements represent several year's worth of data. You
could perhaps define an X-Y-T grid and use a SCAT2GRID*XYT
function to put the data onto that. Likely this data would be
fairly sparse in such a grid.
Instead you might want to think about the data as non-gridded
data, as sets of time series at each station.
Note that if you edit the file to remove the quotes around the
date-time field, then you can read the dates and times, by telling
Ferret that a blank is another delimiter to use. (Future versions
of Ferret will have options to read time records like this using a
single date-time data type, for now read two variables date and
time).
yes? columns/skip=1/format=delim\
/delim="\b\,"/type="numeric,numeric,numeric,numeric,eurodate,time,numeric,numeric"\
/var="pkey1,pkey2,latitude,longitude,st_date,st_time,temp,salt"
test.csv
yes? sh dat
currently SET data sets:
1> ./test.csv (default)
name title I
J K L
PKEY1 pkey1 1:729
... ... ...
PKEY2 pkey2 1:729
... ... ...
LATITUDE latitude 1:729
... ... ...
LONGITUDE
longitude 1:729
... ... ...
ST_DATE st_date 1:729
... ... ...
(Julian days since 1-Jan-1900)
ST_TIME st_time 1:729
... ... ...
(Time of day)
TEMP temp 1:729
... ... ...
SALT salt 1:729
... ... ...
! time in days and fractions of days
yes? let date_and_time = st_date + st_time/24
Now you can investigate the data by making some plots, for instance:
yes? plot longitude
yes? plot latitude
yes? plot/vs/line/sym longitude,latitude
yes? plot date_and_time
yes? plot/i=1:50 date_and_time ! to zoom in on
the details of the time information
You'll see that the longitude/latitudes as they appear in the file
not represent a grid; if they did then the one varying fastest would
repeat. You'll also see that the times are sequences of times at
each station, but they do not represent a single time axis.
-Ansley
On 12/2/2016 4:49 AM, Don DNA wrote:
Hey All,
I got csv file, which I can read easily on ferret with 1 line
command, but I don't know how to manipulate further to make grid
which I am looking forward, please someone help me, it will be
very useful.
Here is my
problem
$ wc -l
test.csv
730 test.csv
$ head -1 test.csv
"pkey1","pkey2","LATITUDE","LONGITUDE","ST_DATE","TEMP","SALT"
$ cut -d',' -f1,2,3,4 test.csv | sort -un | wc -l
82
$ cut -d',' -f1,2,3,4 test.csv | sort -un | head -10
"pkey1","pkey2","LATITUDE","LONGITUDE"
869,1,0,93
869,2,0,93
869,3,0,93
869,4,0,93
869,5,0,93
869,6,0,93
884,1,0,83
884,2,0,83
884,3,0,83
$ ferret
NOAA/PMEL TMAP
FERRET v6.96
Linux 2.6.32-573.7.1.el6.x86_64 64-bit - 12/02/15
2-Dec-16 17:52
yes?
columns/skip=1/format=delim/delim="\,"/type="numeric,numeric,numeric,numeric,text,numeric,numeric"/var="pkey1,pkey2,latitude,longitude,st_date,temp,salt"
test.csv
yes? sh d
currently SET data sets:
1> ./test.csv (default)
name title I
J K L M N
PKEY1 PKEY1 1:730 ...
... ... ... ...
PKEY2 PKEY2 1:730 ...
... ... ... ...
LATITUDE LATITUDE 1:730 ...
... ... ... ...
LONGITUDE
LONGITUDE 1:730 ...
... ... ... ...
ST_DATE ST_DATE 1:730 ...
... ... ... ...
TEMP TEMP 1:730 ...
... ... ... ...
SALT SALT 1:730 ...
... ... ... ...
yes?
I would like to make grid such a way that, when I type "sh d",
I want to see like this, since my data is not uniformly
spaced, I want to keep in 'M' as string only
yes? sh d
currently SET data sets:
1> ./test.csv (default)
name title I
J K L M N
PKEY1 PKEY1 1:82 ...
... ... ... ...
PKEY2 PKEY2 1:82 ...
... ... ... ...
LATITUDE LATITUDE 1:82 ...
... ... ... ...
LONGITUDE
LONGITUDE 1:82 ...
... ... ... ...
ST_DATE ST_DATE 1:82 ...
... ... 1:maxlength ...
TEMP TEMP 1:82 ...
... ... 1:maxlength ...
SALT SALT 1:82 ...
... ... 1:maxlength ...
If I list like this, it should show no of records = maxlength,
something like below
list/i=1 st_date,temp,salt
DATA SET: ./test.csv
X: 0.5 to 8.5
Column 1: ST_DATE
Column 2: TEMP
Column 3: SALT
ST_DATE TEMP SALT
1 / 1: "2000-02-13 17:00:00" 14.37 35.14
2 / 2: "2000-02-13 18:00:00" 15.25 35.09
3 / 3: "2000-02-13 19:00:00" 14.42 35.10
4 / 4: "2000-02-13 20:00:00" 14.37 35.14
5 / 5: "2000-02-13 21:00:00" 14.25 35.12
6 / 6: "2000-02-13 22:00:00" 14.32 35.19
7 / 7: "2000-02-13 23:00:00" 14.37 35.14
maxlength / 8: "2000-02-14 00:00:00" 14.30 35.14
Please
someone help me.
Thanks in advance.
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