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See the recommended documentation of this function

Aide Scilab >> Entrées/Sorties [fichiers] > fscanfMat

fscanfMat

Reads a Matrix from a text file.

Calling Sequence

M = fscanfMat(filename[, fmt]);
[M, text] = fscanfMat(filename [, fmt]);

Arguments

filename

a character string giving the name of the file to be scanned.

fmt

a character string giving the format. This is an optional parameter, the default value is "%lg".

supported format: %[width].[precision]type or %type

width: Optional number that specifies the minimum number of characters output.

precision: Optional number that specifies the maximum number of characters printed for all or part of the output field, or the minimum number of digits printed for integer values.

type: lf, lg, d, i, e, f, g

M

Output variable. A matrix of real numbers.

text

Output variable. A string matrix.

Description

The fscanfMat function is used to read a scalar matrix from a text file. The first non-numeric lines of the file are returned in text if requested and all the remaining lines must have the same number of columns (column separator are assumed to be white spaces or tab characters). The number of columns of the matrix will follow the number of columns found in the file and the number of lines is fetched by detecting eof in the input file. This function can be used to read back numerical data saved with the fprintfMat (default separator used is a space).

Examples

fd = mopen(TMPDIR + "/Mat", "w");
mfprintf(fd, "Some text.....\n");
mfprintf(fd, "Some text again\n");
a = rand(6,6);
for i = 1:6 ,
  for j = 1:6, mfprintf(fd, "%5.2f ", a(i,j));end;
  mfprintf(fd, "\n"); 
end
mclose(fd);
a1 = fscanfMat(TMPDIR + "/Mat")

A = ones(5,5) + 0.1;
fprintfMat(TMPDIR + "/Matrix.txt", A, "%lg");
B = fscanfMat(TMPDIR + "/Matrix.txt", "%lg");
A == B

C = [%nan, %inf, -%inf, 1];
fprintfMat(TMPDIR + "/MatrixNANINF.txt", C);
D = fscanfMat(TMPDIR + '/MatrixNANINF.txt')

See Also

  • scanf_conversion — scanf, sscanf, fscanf conversion specifications
  • mclose — close an opened file
  • meof — check if end of file has been reached
  • mfprintf — converts, formats, and writes data to a file
  • fprintfMat — Write a matrix in a file.
  • mfscanf — reads input from the standard input (interface to the C scanf function)
  • fscanfMat — Reads a Matrix from a text file.
  • mget — reads byte or word in a given binary format and convert to double
  • mgetstr — read a character string from a file
  • mopen — open a file
  • mprintf — converts, formats, and writes data to the main scilab window
  • mput — writes byte or word in a given binary format
  • mputstr — write a character string in a file
  • mscanf
  • mseek — set current position in binary file.
  • mtell — binary file management
  • mdelete — Delete file(s)
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Last updated:
Wed Oct 05 12:11:00 CEST 2011