Read/Write table to files

Description

Nelson provides extensive capabilities for reading and writing tables to files, supporting both text-based and binary storage formats to meet different data management needs.

Text files (.csv, .txt, etc.):

• writetable() exports tables to delimited text files with customizable separators

• readtable() imports tables from delimited text files with automatic format detection

• Text files preserve variable names and data in human-readable format

Binary file:

• Nelson HDF5 format (.nh5):

  • Efficient binary storage using HDF5 format

  • Preserves all table metadata and data types

  • Use save -nh5 and load commands

Binary format is recommended for preserving exact numeric precision and working with large datasets.

Examples

Read/Write table to .nh5 file

% Create a sample table with sensor data
T = table([1.5; -2.3; 4.7], [0.5; 1.1; -0.7], [-1; 2; 3], 'VariableNames', {'Voltage', 'Current', 'Resistance'});
R = T;
filename = [tempdir(), 'table_example.nh5'];
save(filename, '-nh5', 'T');
clear T
load(filename, 'T');
assert(isequal(T, R));
T

Read/Write table to text file

% Create a sample table with sensor data
T = table([1.5; -2.3; 4.7], [0.5; 1.1; -0.7], [-1; 2; 3], 'VariableNames', {'Voltage', 'Current', 'Resistance'});
filename = [tempdir(), 'table_example.csv'];
writetable(T, filename);
T2 = readtable(filename);

See also

writetable, readtable, load, save.

History

Version	Description
1.10.0	initial version

Author

Allan CORNET