How to clear workspace from a function?
20 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Louis Tomczyk
el 16 de En. de 2023
Hi,
I want to create a function that will perform some maintenance operations at the beginning of the script. For example, this function takes a few arguments that will lead to specific initialisations of paths and variables, and above all, clear the workspace from the previous run.
I want to put it in a specific function as the job requires dozens of lines which are quite irrelevant in the work. And I want my "main' script to be as short, readible and high-level as possible.
Below only the first lines of the function.
function init_step(varargin)
clearvars -except varargin
close all
clc
However if I do 2 consecutive runs, it does not clear the workspace. If I want to, I need to explicitely write the "clear" command in the main script, which I try to avoid.
Is there any way to do it?
Thanks in advance.
2 comentarios
Stephen23
el 17 de En. de 2023
Editada: Stephen23
el 17 de En. de 2023
The simple solution would be to make the "specific function" a script, then when you run it, it will clear the worksapce of your main script. But.... using scripts and needing to clear workspaces is a strong indication that you should to refactor your code:
Respuesta aceptada
Bora Eryilmaz
el 16 de En. de 2023
Editada: Bora Eryilmaz
el 16 de En. de 2023
Functions do not keep their variables across calls to them unless a variable is specifically defined in the function using the "persistent" keyword. So, you do not need to try to clear variables in a function workspace in this scenario. Each call to the function has its own variable scope (i.e., workspace), which is already clear when the function starts executing, except of course for the variables that you pass to the function as input arguments.
If the function accesses the variables in the base workspace (using evalin, etc.), that is a different question, in which case you can use the clear command.
0 comentarios
Más respuestas (2)
Hiro Yoshino
el 16 de En. de 2023
One way you can delete variables from the Function Workspace is that you make your variables "global" so you can have access from anywhere.
0 comentarios
Louis Tomczyk
el 17 de En. de 2023
2 comentarios
Bora Eryilmaz
el 17 de En. de 2023
Editada: Bora Eryilmaz
el 17 de En. de 2023
You cannot clear the variables in the main function by calling clear inside another function (init_step).
You can probably describe why you are trying to do something like this as this is a highly unusual thing to try to do. Then someone can probably offer a better workflow/solution. For example, you can make init_step return the initial values of the variables that you are trying to clear. Something like this:
[a, b, c] = init_step(...)
Ver también
Categorías
Más información sobre Startup and Shutdown en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!