Syntax

dat = sw_readtable(datasource)

dat = sw_readtable(datasource,delimiter,nheader)

Description

dat = sw_readtable(datasource) reads tabular data and converts it into a struct with as many number of elements as many data rows can be found in the source. The output field names are determined by the header line that begins with a string. Moreover multiple data columns can be combined using the same column name in the header line multiple times and an additional index in brackets.

The reader also supports tagging of row of data with a string. A line that begins with # defines a tag which will be applied to all following data until a new tag is defined. The tags are saved in the tag field of the output structure.

Examples

The content of the input file (test.dat) is the following:

# TEST DATA
Q(1) Q(2)        Q(3) ENlim(1) ENlim(2) I(1)  EN(1)  s(1) I(2)   EN(2)   s(2)
# [Mxx] [1 0 0]
0     1        2.9992   0       15      1    3.7128   1.0   1   8.6778    1.0
0     1        2.8993   0       15      1    7.0000   1.0   1   11.1249   1.0
0     1        2.7993   0       20      1   13.8576   1.0   0   0.0       0.0
0     1        2.6994   0       20      1   17.3861   1.0   0   0.0       0.0
# [Myy] [1 0 0]
0     1.0000   2.0000   0       25      1   20.2183   1.0   0   0.0       0.0
0     1.1000   2.0000   15      30      1   22.7032   1.0   0   0.0       0.0
0     1.2000   2.0000   20      35      1   25.1516   1.0   0   0.0       0.0

The command to import the data:

dat = sw_readtable('test.dat')
dat(1)

Output

  struct with fields:
      tag: '# [Mxx] [1 0 0]'
        Q: [0 1 2.9992]
    ENlim: [0 15]
        I: [1 1]
       EN: [3.7128 8.6778]
        s: [1 1]

Q = reshape([dat(:).Q],3,[])'

Output

Q =
         0    1.0000    2.9992
         0    1.0000    2.8993
         0    1.0000    2.7993
         0    1.0000    2.6994
         0    1.0000    2.0000
         0    1.1000    2.0000
         0    1.2000    2.0000

Here the imported dat variable will contain the fields tag, Q, ENlim, I, EN and s and it will have 7 entry. The tag variable will contain the '[Mxx] [1 0 0]' string for the first 4 entries and '[Myy] [1 0 0]' for the last 3 entries. For example the field Q has 3 elements per entry and the last command above extracts all \(Q\) points into a matrix.

Input Arguments

dataSource
Data source, can be file, url or string (must contain the newline character).
delimiter
Delimiter of the data, default value is whitespace.
nheader
Number of header lines to be skipped in the beginning of the file. Default value is 0.

Output Arguments

dat
Struct with fields defined in the data.