Matlab: Compare strings in a for loop

Question

I want to compare two strings from two structs. My Code is like below:

%matlab model scan

[variables] = Simulink.findVars('myModell');
variablesNames =[];

%save the names of all the variables in variablesNames
for t= 1:length(variables)
     variablesNames(t).Name = variables(t).Name;   
end

%scan workspace
for f = fieldnames(my_workspace)
    found = false;
    for c = 1:length(variablesNames)
        if strcmp(f{c}, variablesNames(c))        
            found = true;
            result = 'Found in Workspace: ';
        end    
        if ~found
            result = 'Not found inside Workspace';
        end
    end
    disp(['Workspace Variable: ', sprintf('%-*s',40,f{c}), result]);
end

variablesNames is a struct 1x15 with 1 field

my_workspace is 1x1 struct with 20 fields

I got only one variable as return. What is wrong in this code?

f = fieldnames(my_workspace) ? do you mean f = 1:numel(fieldnames(my_workspace))? — Ander Biguri
– Ander Biguri, Commented Jul 1, 2016 at 11:48
You mean only one value in result? That's pretty normal as you override it everytime you loop. Try changing result to result{c} — BillBokeey
– BillBokeey, Commented Jul 1, 2016 at 11:54
@Ander Biguri : I tried your suggestion, but please consider that f is a 20x1 cell . Here is the failure:Cell contents reference from a non-cell array object. Error in stackoverflow (line 13) if strcmp(f{c}, variablesNames(c)) — lara
– lara, Commented Jul 1, 2016 at 12:02
@BillBokeey: I also tried. But result contains only one variable (number 5) from variablesNames — lara
– lara, Commented Jul 1, 2016 at 12:05

DVarga · Accepted Answer · 2016-07-01 12:02:59Z

2

I don't really understand why are you creating a new struct here: variablesNames(t).Name, therefore I just removed that part.

The modified code just iterates through the variables struct-array and checks whether variable my_workspace has a field with the name of the value stored in the Name field of the currently processed element, using isfield.

[variables] = Simulink.findVars('myModell');

for i = 1:length(variables)
   if isfield(my_workspace, variables(t).Name)
      result = 'Found in Workspace: ';
   else
       result = 'Not found inside Workspace';
   end

   disp(['Workspace Variable: ', sprintf('%-*s', 40, variables(t).Name), result]);
end

answered Jul 1, 2016 at 12:02

DVarga

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