Run a simulink/script from a pushbutton

hi

i've a script in a PB_function and when i push the button it shows me a lot off errors.Running the originar script without the PB it works but when i use in PB_function doesn't work:

??? Error using ==> gui_passdata>pb2_call at 438
Error due to multiple causes.

Caused by:
    Error using ==> gui_passdata>pb2_call at 438
    Error evaluating parameter 'VariableName' in
    'modelo_pilha1/B': Undefined function or variable 'P1'.

in the scrip i've a simulink model that uses the variable P1 but i don't change anything and it doesn't work.

a(1)=5*10^(-3);            
    b(1)=5*10^(-2);           
    PP1=a(1)+(b(1)-a(1))*rand;  
    P1=[t PP1];

to run the simulink model

     load_system('modelo_pilha1');    % correr simulink e obter Vsimulado

        sim('modelo_pilha1');

[TAB]

Which block is using 'P1' in your model ?

Where the value of 'P1' is defined?

Is it defined in base workspace?

[Nu9]

when i run the original script it saves in workspace all the variables. The value P1 isn't defined in the script.

The block tiype is-from workspace

Answer 1

[TAB]

From workspace block reads wariable from base workapace.

If you are defining and writing P1 variable from pushbutton callback function, then it will not saved in base workspace. Every function have its own workspace and they not shares variables.

Try saving P1 in .mat file and load this .mat in base wokspace before starting the simulation.

P1=[t PP1];     
save('Myfile.mat','P1');
evalin('base','load(''Myfile.mat'')');

%load model & Simulate
load_system('modelo_pilha1');    % correr simulink e obter  Vsimulado           sim('modelo_pilha1');

[Nu9]

it worked, but i've a lot of variables and i need to send them to workspace, how can i send them all at once? it's possible?or i need to add - save and evalin- after all the variables?

[TAB]

No need to add 'save' & 'evalin' after all variable.

You can save you complete function workspace at once.

After all your variables are defined and ready, use

save('Myfile.mat');

It will transfer all variables you have defined in function, to 'Myfile.mat'.

Note: It save the workspace of the function in which it is used. Every function have its own workspace.

Using

evalin('base','load(''Myfile.mat'')') all the variables from 'Myfile.mat' will be loaded to base workspace,

See 'doc save' and 'doc load';

[Nu9]

thanks for thr tip, now i need to solve just a problem about some variables, some are vector or matrices.I don't find th way to save that type off data in save doc and other doc's, only shows struct.

one of the variables- V value in workspace - <10x8x51 double>

[TAB]

'save' funcn saves all type of data into .mat file whatever its type. You just define your data and run 'save' function.

You can check yourself on base workspace.

Define Arruays, Matrices, Structures.... or any kind of data in Command window. These variables will be placed in base workspace.

Now run 'save' function in command window to save base workspace in a .mat file. Clear all the data from base workspace by hitting 'clear all' command.

Now load your .mat using 'load'. You can see all the defined data in workspace.

Same concept applies to function workspace.

Answer 2

[Kaustubha Govind]

By default, Simulink looks for parameter variables in the base workspace. You variable P1 is created in the function workspace, where Simulink isn't looking. To have it looks for P1 in the current/function workspace, use:

load_system('modelo_pilha1');
opt=simset('SrcWorkspace','current');
sim('modelo_pilha1',opt);

Alternatively, you can follow Tabrez's suggestion of loading the variables into the base workspace.

[Nu9]

thanks, i will try it

[TABOUNI Khadidja]

did this answer hel you?

[TABOUNI Khadidja]

i need to do the same thing but save whatever the sim func gives me