How to change arrow labels of simulink blocks

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% Firstly we have to read old signal labels or arrow labels of block diagrams in simulink through matlab code
%Then write new labels which replaces old one through matlab code

Answers (1)

Salman Ahmed
Salman Ahmed on 31 Dec 2021
Hi Vibhu,
You can programmatically rename the Simulink signal line names by first doing a global search for that signal name in the model using "find_system" and then renaming the signal using "set_param".
1) To global search the names of lines in Simulink model:
To rename any line which is already labelled in the model, first you need to get the handle to that signal using "find_system" function with 'FindAll'-'on' and 'Name'-<Current signal name> as Name-Value arguments. See the example in the code snippet below.
open_system('vdp')
% get handle to the signal with label 'x1' using "find_system"
X1LineHandle = find_system('vdp','FindAll','on','Name','x1');
2) Renaming the signal lines:
Using "set_param" with 'Name'-<New line name> as Name-Value arguments as shown in the code snippet below, the signal lines can be renamed.
% Rename the signal label 'x1' to 's1' using "set_param"
for i = 1:length(X1LineHandle)
set_param(X1LineHandle(i),'Name','s1');
end

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