MATLAB: From string to a variable

strings

Hi everybody, i've a string array array={'dog', 'bike', 'donut'} for example from here i need, for each word, a numeric variable with the same name

dog = 5;

bike = 7;

donut = 54;

(doesn't matter the numbers the most importan thing is to create the variable from the string in array )

Best Answer

I would use eval

names = {'dog','bike','donut'}
for i = 1:length(names)
  eval([names{i} ' = rand;'])
end

Related Solutions

MATLAB: How to add variables in workspace with names derived from a char array and corresponding values stored in a double array

Here is an example

col_names = ['time ';'speed'];
data = [0 1;2 3;4 5];
for m = 1:2
    eval(sprintf('%s = data(:,m)',col_names(m,:)));
end

HTH

MATLAB: How to dynamically extract fields from a structure and create variables in the MATLAB workspace using the field names

One possibility to dynamically decompose your struct would be using FIELDNAMES command to determine the fields and create according variables using EVAL, like in the following example:

constants.a = 4;
constants.b = 8;
constants.c = 10;
names = fieldnames(constants);
for i=1:length(names)
eval([names{i} '=constants.' names{i} ]);
end

In case of nested structures, you can use nested FOR loops to access the fields.

constants.a.aa=4;
constants.a.ab = 5;
constants.b = 8;
constants.c = 10;
names = fieldnames(constants);
for i=1:length(names)
      if isstruct(eval(['constants.' names{i}]))
          names2 = fieldnames(eval(['constants.' names{i}]));
          for j=1:length(names2)
              eval([names{i} '_' names2{j} '=constants.' names{i} '.' names2{j}]);
          end
      else
          eval([names{i} '=constants.' names{i} ]);
      end
end

Best Answer

Related Solutions

MATLAB: How to add variables in workspace with names derived from a char array and corresponding values stored in a double array

MATLAB: How to dynamically extract fields from a structure and create variables in the MATLAB workspace using the field names

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