MATLAB: Create a new variable whos name is conditional

create a new variableMATLAB

Hi. How can I creat a new variable whose name I dont know yet. A simple example is below. Thanks

    >> [a,b,c]=xlsread('myfile.xlsx')
    a =
         []
    b = 
        'new_var'
    c = 
        'new_var'
 .... now I want to create a variable whose name is the same as the string taken from b . i.e I want to creat a variable with name new_var . and then give it a value ( new_var=10). How?

Best Answer

Use the genvarname command.

mv = genvarname('my_varname');
eval([mv '= 123;']);
my_varname

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MATLAB: Load excel sheets with a specific name from the data set

Hi Mikkel,

I do not know which data from the sheet you want to assign to the variable, but lets suppose you already have your data in this variable:

var_data = 'whatever'; % Variable containing the data

Now you can follow this steps:

Read the name on the sheet and modify it to fit the variable names restrictions:

[~,~,name] = xlsread('Test.xls',1,'A13'); % Read cell A13 from sheet 1 from Test.xls
name_split = strsplit(name{1},'-'); % Separate string and number
new_name = strcat(name_split(1),'_',name_split(2)); % Join string and number again

At this point you will have 'PP_217' instead of 'PP-217'.

Generate a new variable with that name, and assign the value in your data variable:

var_name = genvarname(new_name);
eval([var_name '= var_data;']);

Now you will have what you are looking for.

Note that you can change 'var_data' with a command (i.e. if you want to read a matrix from the excel sheet). Also note that genvarname can be deprecated in your Matlab version, but there are replacements for the function.

I hope this helps!

Angel.

MATLAB: How to change variable name from known string

assignin('base',Old_var,'New_var')

Best Answer

Related Solutions

MATLAB: Load excel sheets with a specific name from the data set

MATLAB: How to change variable name from known string

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