List of MATLAB environment variables

matlab_env_list.m

%% Create additional variables
setenv('ExampleVar1', 'on')
setenv('ExampleVar2', 'yes')
setenv('ExampleVar3', 'true')

%% List of Java environment variables
env_java = java.lang.System.getenv();
keys_java = cell(env_java.keySet.toArray());

%% List of system environment variables
if ispc, cmd = 'set'; else cmd = 'env'; end
[~, out] = system(cmd);
env_sys = regexp(strtrim(out), '^(.*)=(.*)$', 'tokens', ...
    'lineanchors', 'dotexceptnewline');
env_sys = vertcat(env_sys{:});
keys_sys = env_sys(:, 1);

%% Keys defined in Java list only
keys_java_only = setdiff(keys_java, keys_sys)

% On my machine:
%   =::

%% Keys defined in system list only
keys_sys_only = setdiff(keys_sys, keys_java)

% On my machine:
%   ExampleVar1
%   ExampleVar2
%   ExampleVar3
%   PROMPT