[gradsusr] mfhilo

Fri May 20 04:54:46 EDT 2011

Hello, I need some help because I have a problem when i use this script ;

'open file.ctl'

'set lat'

'set long'

'set gxout contour'

'd prmslmsl/100'

'result = mfhilo (prmslmsl/100) CL,h|l'

minmax = sublin(result,1)

say 'minmax = 'minmax

all the high and low pressure define it in the reult are with L of low 
pressure.

mfhilo GR method N: 3  maxmin: 0  pcntile:      0  latc:  40.00 lonc: 
0.00 radinfc:    -999 [nm] nsigdig: -1

L    37.46   -9.16  M:    1010.57  G:   56.1  L:   74.2  D:  454.54  GV: 
0.474305  LV:   0.841057

L    36.62    1.97  M:    1012.45  G:  100.0  L:  100.0  D:  222.82  GV: 
0.846165  LV:    1.13344

L    41.93    7.84  M:    1016.68  G:   12.5  L:   47.8  D:  373.53  GV: 
0.105741  LV:   0.541986

minmax = mfhilo GR method N: 3  maxmin: 0  pcntile:      0  latc:  40.00 
lonc:    0.00 radinfc:    -999 [nm] nsigdig: -1

Why there isn't an H of high pressure in the last result, what it's wrong?

I have another question, When i have this results then  How can I draw the 
H/L or A/B pictos in the picture map?

Thank you!!!

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Today's Topics:

   1. taylor diagram (Ismaila Diallo)
   2. big/little endian bug in OpenGrads v2.0.a9.oga.1 for 2-byte
      integers files (Henrique Barbosa)
   3.  P-value of scorr & tcorr (James Ciarlo`)

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Message: 1
Date: Thu, 19 May 2011 14:34:18 +0100 (BST)
From: Ismaila Diallo <ismailadiallo64 at yahoo.fr>
Subject: [gradsusr] taylor diagram
To: gradsusr at gradsusr.org
Cc: gradsusr-request at gradsusr.org
Message-ID: <515512.55610.qm at web29605.mail.ird.yahoo.com>
Content-Type: text/plain; charset="us-ascii"

dear Grads user's
i went to plot a taylor diagram in grads but i don't know how doing that. So 
if
someone has idea or other tools (script) then could he help me.
Thanks in advance
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Message: 2
Date: Thu, 19 May 2011 15:58:39 -0300
From: Henrique Barbosa <hmjbarbosa at gmail.com>
Subject: [gradsusr] big/little endian bug in OpenGrads v2.0.a9.oga.1
for 2-byte integers files
To: Grads <gradsusr at gradsusr.org>
Message-ID: <BANLkTimeiL=Z22Wdx0kWnOOE-F73CBd5+w at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Dear all,

I was trying to read a single variable written as 2-byte signed integer in a
big endian file. Plain binary file, i.e. stream, with no header. Should be
really simple, but it was not. For handling this, I had my CTL as:

(...)
options big_endian
(...)
myvar 0 -1,40,2,-1 ** my variable
(...)

However, it did not work. The values were completely wrong. After a day
trying to understand what as going on, I decided to force 'little_endian' on
the CTL despite the file being big-endian... and it worked!! and I could
read the data.

However, USGS claims gtopo30 to be big_endian. To make sure,  I wrote a  F90
program to read it. I could only get the correct data inside the program if
I opened the file as big_endian. Therefore, as USGS and my program agree, I
believe the data is big_endian.

Therefore the problem should be in grads. I made a series of tests, writing
1-byte, 2-byte and 4-byte integer binary files, and 4-byte float files, for
both little and big endian types. The only problem I found was with 2-byte
integers. I think that it is a bug in grads, actually, OpenGrads
v2.0.a9.oga.1. The necessary data to reproduce the problem can be found
here:

<http://www.fap.if.usp.br/~hbarbosa/file_format.tgz>

Can some expert have a look in the source code? Arlindo? Jennifer? By the
way, I am on x86-64 machine, runing ubuntu 64bits and using
grads-2.0.a9.oga.1-bundle-x86_64-rhel5.5-linux-gnu.tar.gz.

Sincerely,
Henrique
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Message: 3
Date: Fri, 20 May 2011 09:53:59 +0200
From: "James Ciarlo`" <james.ciarlo at physics.org>
Subject: [gradsusr]  P-value of scorr & tcorr
To: gradsusr at gradsusr.org
Message-ID: <BANLkTim_PS3jSMXCKp_LGhOABDh_EUqERA at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Dear gradsusrs,

I have a question about scorr and tcorr functions. Is there a way to obtain
the p-value in this cases? i.e. one value for scorr and map value for tcorr

Or anything of the sort?

Regards,

James
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