names

Let's say that I need to generate variables to hold some input from the user (I don't know how many they are). Without using Array , ArrayList (and other kind of lists and maps) can my code generate (lets say) String variables X times with names like ( String var001 , String var002 , String var003 , etc)? If yes, please provide sample code. Following is the way that i have implemented and helped me to fix my solution easily without much hurdles. // Creating the array List List accountList = new ArrayList(); for(int k=0;k < counter;k++){ accountList.add(k, (String)flowCtx.getValueAt("transitId"

In the minimal example below, I am trying to use the values of a character string vars in a regression formula. However, I am only able to pass the string of variable names ("v2+v3+v4") to the formula, not the real meaning of this string (e.g., "v2" is dat$v2). I know there are better ways to run the regression (e.g., lm(v1 ~ v2 + v3 + v4, data=dat) ). My situation is more complex, and I am trying to figure out how to use a character string in a formula. Any thoughts? Updated below code # minimal example # create data frame v1 <- rnorm(10) v2 <- sample(c(0,1), 10, replace=TRUE) v3 <- rnorm(10)

Is it possible to concatenate variable names in C? Specifically, I have a struct that contains 6 similar variables in it called class1 , class2 , class3 , etc. I want to run through a for loop to assign each variable a value, but I can't see how to do it without somehow concatenating the variable name with the value of the for loop counter. How else could I do this? When you find yourself adding an integer suffix to variable names, think I should have used an array . struct mystruct { int class[6]; }; int main(void) { struct mystruct s; int i; for (i = 0; i < 6; ++i) { s.class[i] = 1000 + i; }