Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
read
matrices read
Calling Sequence
[x] = read(file-desc,m,n,[format]) [x]=read(file-desc,m,n,k,format)
Arguments
- file-desc
character string specifying the file name or integer value specifying logical unit (fortran, see file).
- m, n
integers (dimensions of the matrix x). Set m=-1 if you do not know the numbers of rows, so the whole file is read.
- format : character string, specifies a "Fortran" format. This
character string must begin with a right parenthesis and end with a left parenthesis. Formats cannot mix floating point or character edition modes.
- k
integer or vector of integer
Description
reads row after row
the mxn
matrix x
(n=1
for character chain) in the
file file-desc
(string or integer). Each row of the matrix x
begin in a new line of file-desc
file. Depending on format
, a
given row of the x
matrix may be read from more than one line
of file-desc
file.
The type of the result will depend on the specified format.
If format contains only (d,e,f,g)
descriptors the function
tries to read numerical data (the result is matrix of real numbers).
If format contains only a
descriptors the function tries to
read character strings (the result is a character string column
vector). In this case n must be equal to 1.
Warning: The character strings are truncated when they are longuer than 4093. |
Examples for format
:
(1x,e10.3,5x,3(f3.0)) (10x,a20)
When format is omitted data are read using numerical free format: blank, comma and slash may be used as data separators, n*v may be use to represent n occurrences of value n.
A direct access file can be used if using the parameter k
which is
is the vector of record numbers to be read (one record per row),
thus m
must be m=prod(size(k))
.
To read on the keyboard use read(%io(1),...)
.
Remark
Last line of data files must be terminated by a newline to be taken into account.
Examples
See Also
- write — write in a formatted file
- load — Load a saved variable or a serie of variables
- file — file management
- readb — fortran file binary read
- x_dialog — Dialog for interactive multi-lines input.
- mscanf
- mfscanf — reads input from the stream pointer stream (interface to the C fscanf function)
- msscanf
- fscanfMat — reads a matrix from a text file
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