performance - Code organization Matlab -

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• in matlab, can have script , function definition in same file? 7 answers

i write program @ matlab. in .m file. , it's 300+ strings of code now, became not comfortable reading. idea use in c++: want create local functions @ end of file , put pieces of code them. easy read , consist of logical parts.

but faced fact local functions can created in body of other function! can't create this:

x = 1; y = 2; z = mylocalfnc(x,y);  function res = mylocalfnc (a,b)  res = a.*b; end 

this generate error:

function definitions not permitted in context.

i can including whole code 1 function:

function mybigfcn x = 1; y = 2; z = mylocalfnc(x,y); end  function res = mylocalfnc (a,b)  res = a.*b; end 

but variables became local , return workspace nothing. modify input/output function time create variable - don't think walk right way... here described advantages , disadvantages of method.

i know can create function in additional .m file, save , use in script - ok, lot of them single-operation, don't want create new files.

my question other methods of code organizing?

one option, if don't mind saving file locally, restructure code multiple functions (all in same file) , pass necessary variables output. have short script calls function , creates necessary variables.

for example, script looks this

numpoints = 5; = randn(numpoints); b = sin(a); c = + b; 

you restructure like

function data = main()   data.numpoints = 5;   data.a = geta(data.numpoints);   data.b = getb(data.a);   data.c = getc(data.a, data.b);  function = geta(numpoints)   = randn(numpoints);  function b = getb(a)   b = sin(a);  function c = getc(a, b)   c = + b; 

and create script file looks like

data = main(); 

you have struct called data contains of variables. if want them contained in separate variables (i.e. not in struct) there couple of ways it. 1 unpack them manually,

a = data.a; b = data.b; c = data.c;  clear data; 

another save struct, , reload (this has advantage of keeping copy of workspace used fun of function, later analysis).

save('workspace.mat', '-struct', 'data'); load('workspace.mat');