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7.3 Summary of Built-in Variables

Here is a summary of all of Octave's built-in variables along with cross references to additional information and their default values. In the following table octave-home stands for the root directory where all of Octave is installed (the default is ‘/usr/local’, version stands for the Octave version number (for example, 2.0.13) and arch stands for the type of system for which Octave was compiled (for example, i586-pc-linux-gnu).

DEFAULT_LOADPATH

See section 11.6 Function Files. Default value: ".:octave-home/lib/version".

EDITOR

See section 2.4.5 Commands For Manipulating The History. Default value: "emacs".

EXEC_PATH

See section 29.3 Controlling Subprocesses. Default value: ":$PATH".

INFO_FILE

See section 2.3 Commands for Getting Help. Default value: "octave-home/info/octave.info".

INFO_PROGRAM

See section 2.3 Commands for Getting Help. Default value: "octave-home/libexec/octave/version/exec/arch/info".

LOADPATH

See section 11.6 Function Files. Default value: ":", which tells Octave to use the directories specified by the built-in variable DEFAULT_LOADPATH.

OCTAVE_HOME

Default value: "/usr/local".

PAGER

See section 13 Input and Output. Default value: "less", or "more".

PS1

See section 2.4.6 Customizing the Prompt. Default value: "\s:\#> ".

PS2

See section 2.4.6 Customizing the Prompt. Default value: "> ".

PS4

See section 2.4.6 Customizing the Prompt. Default value: "+ ".

auto_unload_dot_oct_files

See section 11.8 Dynamically Linked Functions. Default value: 0.

automatic_replot

See section 14.1 Two-Dimensional Plotting. Default value: 0.

beep_on_error

See section 12 Error Handling. Default value: 0.

completion_append_char

See section 2.4.4 Letting Readline Type For You. Default value: " ".

default_eval_print_flag

See section 9 Evaluation. Default value: 1.

default_return_value

See section 11.2 Multiple Return Values. Default value: [].

default_save_format

See section 13.1.3 Simple File I/O. Default value: "ascii".

do_fortran_indexing

See section 8.1 Index Expressions. Default value: 0.

crash_dumps_octave_core

See section 13.1.3 Simple File I/O. Default value: 1.

define_all_return_values

See section 11.2 Multiple Return Values. Default value: 0.

empty_list_elements_ok

See section 4.1.1 Empty Matrices. Default value: "warn".

fixed_point_format

See section 4.1 Matrices Default value: 0.

gnuplot_binary

See section 14.3 Three-Dimensional Plotting. Default value: "gnuplot".

history_file

See section 2.4.5 Commands For Manipulating The History. Default value: "~/.octave_hist".

history_size

See section 2.4.5 Commands For Manipulating The History. Default value: 1024.

ignore_function_time_stamp

See section 11.6 Function Files. Default value: "system".

implicit_num_to_str_ok

See section 5.3 String Conversions. Default value: 0.

implicit_str_to_num_ok

See section 5.3 String Conversions. Default value: 0.

max_recursion_depth

See section 8.2.2 Recursion. Default value: 256.

ok_to_lose_imaginary_part

See section 15.3 Special Utility Matrices. Default value: "warn".

output_max_field_width

See section 4.1 Matrices. Default value: 10.

output_precision

See section 4.1 Matrices. Default value: 5.

page_screen_output

See section 13 Input and Output. Default value: 1.

prefer_column_vectors

See section 8.1 Index Expressions. Default value: 1.

print_answer_id_name

See section 13.1.1 Terminal Output. Default value: 1.

print_empty_dimensions

See section 4.1.1 Empty Matrices. Default value: 1.

resize_on_range_error

See section 8.1 Index Expressions. Default value: 1.

return_last_computed_value

See section 11.5 Returning From a Function. Default value: 0.

save_precision

See section 13.1.3 Simple File I/O. Default value: 17.

saving_history

See section 2.4.5 Commands For Manipulating The History. Default value: 1.

silent_functions

See section 11.1 Defining Functions. Default value: 0.

split_long_rows

See section 4.1 Matrices. Default value: 1.

struct_levels_to_print

See section 6 Data Structures. Default value: 2.

suppress_verbose_help_message

See section 2.3 Commands for Getting Help. Default value: 1.

treat_neg_dim_as_zero

See section 15.3 Special Utility Matrices. Default value: 0.

warn_assign_as_truth_value

See section 10.1 The if Statement. Default value: 1.

warn_comma_in_global_decl

See section 7.1 Global Variables. Default value: 1.

warn_divide_by_zero

See section 8.3 Arithmetic Operators. Default value: 1.

warn_function_name_clash

See section 11.6 Function Files. Default value: 1.

warn_reload_forces_clear

See section 11.8 Dynamically Linked Functions. Default value: 1.

warn_variable_switch_label

See section 10.2 The switch Statement. Default value: 0.

whitespace_in_literal_matrix

See section 4.1 Matrices. Default value: "".