How to process multiple variable through a single equation

I am trying to shorten a script that is enormous. I am not sure how to create an idependent name, and use the variable in the equation and loop through with hundreds of variables. Here is an example of my problem:

SigIdx = {'r' 't' 'y' 'u' 'i' 'o'};
'SigIdx'_ISO = gridfit(n,M,'SigIdx',ngrid,Mgrid);

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Andrew]

This helps with creating the stucture and simplifies my scripting, but I am still having problems with the equation.

I still am having problems having the equation process the data in each variable. What I neglected to mention was that 'r' and all the variables have numerical values, not sure if that matters.

I see that creating a structure can help my naming convention, but how do I get each individual variable to run through the equation?

SigIdx = {'r' 't' 'y' 'u' 'i' 'o'}; 'SigIdx'_ISO = gridfit(n,M,'SigIdx',ngrid,Mgrid);