Many thanks for the ferret support I have received in the past on this Usergroup.
I am stuck on problem with Ferret that I (after spending some time on it and trying various options) appear unable to solve, so your suggestions are greatly appreciated.
I am trying to add variability to a dependent variable (plotted on Y-axis) with X-axis being a Time axis. I am using the go script error_bars.jnl but am having some problems. A sample of the data file appears at the end of this email. Using FERRET v6.1 on Linux(g77) 2.6.9-22. - 03/26/08
Ascii File is read in using
SET DATA/FORM=DELIM/SKIP=1 .....
Initially I have to grid the "mean" along the properly setup time-axis which I am able to do using
LET days_2001 = DAYS1900(2001,1,1)
LET day_frac = (var_hour + var_minute/60 ) / 24
LET tstep = DAYS1900(var_year,var_month,var_day) - days_2001 + day_frac
LET ntime = `begindatetime,return=isize`
LET dummy = t[GT=ttaxis]
LET new_var = RESHAPE(mean,dummy)
Then I also grid the "sdev" variable along the same time axis using
LET new_err = RESHAPE(sdev,dummy)
Then when I issue the following commands..I get a Time Series plot that has all the values bunched up one end (basically the time axis is expanded for some reason). This does not happen if I omit the GO script call below. Any ideas? Am I doing something wrong?
PLOT /SYMBOL=17/SIZE=0.07/Line=2/NOLABELS new_var
GO error_bars polygon/color=blue/thickness=1/nolab new_var new_err
Here is a file sample of the ASCCII
filename begindatetime location SolarZenith npix mean sdev
MOD04_L2.A2007001.1500.005.2007003093108.hdf 2007-01-01 15:00:00 GISS 69.450 0
MOD04_L2.A2007001.1635.005.2007003093604.hdf 2007-01-01 16:35:00 GISS 63.960 0
MOD04_L2.A2007002.1540.005.2007004182338.hdf 2007-01-02 15:40:00 GISS 66.020 9 0.081 0.058
MOD04_L2.A2007003.1625.005.2007005151340.hdf 2007-01-03 16:25:00 GISS 64.020 15 0.027 0.013
MOD04_L2.A2007004.1530.005.2007007055054.hdf 2007-01-04 15:30:00 GISS 66.790 0
MOD04_L2.A2007005.1615.005.2007008173325.hdf 2007-01-05 16:15:00 GISS 64.230 0
MOD04_L2.A2007006.1520.005.2007010020024.hdf 2007-01-06 15:20:00 GISS 67.540 0
MOD04_L2.A2007007.1600.005.2007012202039.hdf 2007-01-07 16:00:00 GISS 64.630 7 0.167 0.079
MOD04_L2.A2007008.1505.005.2007012223915.hdf 2007-01-08 15:05:00 GISS 68.360 0
MOD04_L2.A2007008.1645.005.2007012225717.hdf 2007-01-08 16:45:00 GISS 63.230 0
MOD04_L2.A2007009.1550.005.2007013005323.hdf 2007-01-09 15:50:00 GISS 65.080 0
MOD04_L2.A2007010.1630.005.2007013053221.hdf 2007-01-10 16:30:00 GISS 63.060 5 0.039 0.017
MOD04_L2.A2007011.1535.005.2007014063943.hdf 2007-01-11 15:35:00 GISS 65.630 12 0.113 0.068
MOD04_L2.A2007012.1620.005.2007014045513.hdf 2007-01-12 16:20:00 GISS 63.130 0
MOD04_L2.A2007013.1525.005.2007015044928.hdf 2007-01-13 15:25:00 GISS 66.360 0
MOD04_L2.A2007014.1605.005.2007017161152.hdf 2007-01-14 16:05:00 GISS 63.360 0
MOD04_L2.A2007015.1510.005.2007017183912.hdf 2007-01-15 15:10:00 GISS 67.080 0
MOD04_L2.A2007016.1555.005.2007018180305.hdf 2007-01-16 15:55:00 GISS 63.700 0
MOD04_L2.A2007017.1500.005.2007019123555.hdf 2007-01-17 15:00:00 GISS 67.970 5 0.000 0.004
MOD04_L2.A2007017.1635.005.2007019125327.hdf 2007-01-17 16:35:00 GISS 61.780 15 0.028 0.012
MOD04_L2.A2007018.1540.005.2007020111006.hdf 2007-01-18 15:40:00 GISS 64.170 8 0.126 0.044
On Fri, Apr 3, 2009 at 12:45 PM, Ansley Manke
<Ansley.B.Manke@xxxxxxxx> wrote:
Hi -
Yes, you can get the number of records. Once you've opened the dataset
you can get that with
LET ntime = `v1,return=isize`
then
DEFINE axis/T/T0=1-jan-2001/UNIT=days
ttaxis=tstep[L=1:`ntime`]
The grave-accent syntax, also called immediate-mode expressions if you
want to find it in the documentation, causes Ferret to evaluate the
variable at the time of command-parsing so it can be used immediately
in the DEFINE command.
To get axis labels correct, assign units and title to variables as you
define them.
LET/units="meters"/title="Station Location" new_var =
reshape(v6,dummy)
Or whatever.
Ansley