[Limdep Nlogit List] Read matrix / sample statistics of matrix columns
Steven Yen
syen at utk.edu
Fri Nov 5 10:31:05 EST 2010
Thanks Prof Greene. I will try that. I do have a real matrix with
multiple columns. The random matrix was simply a quick way to get a
matrix together to demonstrate what I need.
Steven Yen
At 07:10 PM 11/4/2010, you wrote:
>Steven. Your matrix is already a matrix. The page you mention in
>the manual shows how to read a data set from the editor into a matrix.
>The ;MATRIX=Longly says that the data read will be placed in a matrix
>named longley. Your READ command below takes data that are already
>a matrix and tries to read them into another matrix, though
>unfortunately, it tries to put MYX into itself. There are a couple
>ways to get the means and standard deviations of a matrix. You
>can move the matrix to the data area, such as
>Create ; MYX1=-999;MYX2=-999;MYX3=-999$
>Namelist ; MYXV=MYX1,MYX2,MYX3$
>Create ; MYXV=MYX$
>Sample;1-5$
>Now you can use DSTAT to describe the data. On the other hand, it
>seems it would be much easier just to create the random data as
>variables to begin with.
>/B. Greene
>
>
>----- Original Message -----
>From: "Steven Yen" <syen at utk.edu>
>To: "Limdep and Nlogit Mailing List" <limdep at limdep.itls.usyd.edu.au>
>Sent: Thursday, November 4, 2010 4:01:14 PM GMT -05:00 Colombia
>Subject: [Limdep Nlogit List] Read matrix / sample statistics of
>matrix columns
>
>Dear
>
>Page R12-44 of the Reference Guide suggests a way to read a matrix as
>a data file. I could not read a matrix properly; see error message below.
>
>What I need is to calculate sample means and standard deviations for
>each column of a matrix. Is there a convenient way to do this? Thanks.
>
>----
>
>--> calc ;nr=5 ;nc=3 $
>--> matrix ;list ;myx=rndm(nr,nc) $
>
>Matrix MYX has 5 rows and 3 columns.
> 1 2 3
> +-------------+-------------+-------------+
> 1| -.10830 .97037 .22962
> 2| -.71564 .95221 -1.13377
> 3| -.49604 -.24165 -.27317
> 4| .50904 -.98409 -2.31595
> 5| -.14872 -1.35394 1.01877
> +-------------+-------------+-------------+
>--> read ;rows=10 ;cols=5 ;matrix=myx $
> Error 9: READ - error or end of file occurs while reading data set.
> Error 327: Closing command file to prevent reading data as command
>
>
>
>Steven T. Yen
>http://web.utk.edu/~syen/
>Check out our postdoc opening at:
>http://web.utk.edu/~syen/postdoc.html
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Steven T. Yen
http://web.utk.edu/~syen/
Check out our postdoc opening at:
http://web.utk.edu/~syen/postdoc.html
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