R-sig-Geo Digest, Vol 136, Issue 24

Many Thanks Ben

It worked !!! fread of matlab works and i back scaled the data ...

Thanks again
Sharoze

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Today's Topics:

   1. Re: How to read simple raster data (Benjamin.Galuardi)
   2. ? R Sig Geo, Mario Montecinos te ha dejado un mensaje
      (Mario Montecinos)

----------------------------------------------------------------------

Message: 1
Date: Mon, 29 Dec 2014 10:14:20 -0500
From: "Benjamin.Galuardi" <galuardi at mit.edu>
To: r-sig-geo at r-project.org
Subject: Re: [R-sig-Geo] How to read simple raster data
Message-ID: <54A16FCC.90900 at mit.edu>
Content-Type: text/plain; charset=windows-1252; format=flowed

Hi Sharoze,

The data appear to be in hexadecimal form. I think Matlab is capable of
importing this directly (fread??) but I'm not sure. If you need to use
R, you might try this example:

library(fields)
hdat =  readBin('C:/Downloads/data/isola.157x458.phase', what = 'raw',
size=1, n = 157*458)

ndat = strtoi(pdat)  # converts from hex to numeric, assuming it is
supposed to be numeric..

image.plot(matrix(ndat, nrow=157, ncol=458))

according to the documentation, the '.surf' files are 4 byte, so change
size=4 for those.

hope that helps,

Ben

On 12/27/2014 2:34 PM, sharoze ali wrote:
Hi All

Iam new to this convention \format " Simple raster format " . My
intention
is to use the data of the book " two-dimensional phase unwrapping theory
algorithms and software " which is in raster format . The link for data
is "
ftp://ftp.wiley.com/sci_tech_med/phase_unwrapping/ " . Can anyone help
me
on this . I want to use/convert the *RASTER DATA TO MATRIX* so that i can
use the my  matlab programs . Please help !!!

Best Regards,
Sharoze Ali ,
Sharu786786 at gmail.com

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--
==================================================
Benjamin Galuardi
PhD Student
NMFS-Seagrant Population Dynamics Fellow
SMAST, UMass Dartmouth
================================================

------------------------------

Message: 2
Date: Tue, 30 Dec 2014 02:32:28 +0000
From: Mario Montecinos <noreply+2872486877 at badoo.com>
To: r-sig-geo at r-project.org
Subject: [R-sig-Geo] ? R Sig Geo, Mario Montecinos te ha dejado un
        mensaje
Message-ID: <20141230023228.5BBB8D6604E at cluster2033.monopost.com>
Content-Type: text/plain; charset="UTF-8"

Mario Montecinos  te ha dejado un mensaje

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End of R-sig-Geo Digest, Vol 136, Issue 24
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