| Re: Saving array into column formatted text file [message #8721] |
Wed, 16 April 1997 00:00 |
Jim O'connor
Messages: 7
Registered: March 1996
|
Junior Member |
|
|
> Mila Mitra wrote:
>
> I have IDL arrays, that I would like to write out to a text file
> so that it retains the dimensionality in the form of rows and
> columns.
>
Here's a simple way:
Wave > rm,a,2,3 # Read a 2x3 matrix (from the command line)
row 0: 1 2 3 # or you could say
row 1: 4 5 6 # a = transpose([ [1,2,3],[4,5,6]])
Wave > pm,a # print the matrix on stdout
1.00000 2.00000 3.00000
4.00000 5.00000 6.00000
# The next three lines write the matrix to a file:
Wave > openw, outunit,'/tmp/tmp.sav',/Get_Lun
Wave > pmf, outunit, a # print matrix to file
Wave > close,outunit
Wave > $ cat /tmp/tmp.sav
1.00000 2.00000 3.00000
4.00000 5.00000 6.00000
You can read the file in with rmf. Rm, rmf, pm and pmf
are standard functions in Wave.
You may want to transpose a pre-existing array, since
these functions use matrixname(row_index,column_index),
while Wave normally assumes arrayname(column_index,row_index); e.g.
Wave > pm,a(0,*)
1.00000 2.00000 3.00000
Wave > print,transpose(a(0,*))
1.00000 2.00000 3.00000
--
Jim
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
