Martix is getting updated with the value of e,Without adding a new column, Please help me.

persistent eWithDeltaL;

eWithDeltaL = [];

eWithDeltaL(end+1) = e;

Answer 1

[Walter Roberson]

You are overwriting eWithDeltaL with [] every time. You should have the assignment of [] to the variable only when you know that you want to reset the variable.

[kintali narendra]

Is there any other way to define the variable and to get it updated.

[Walter Roberson]

When you declare a variable as persistent, it is automatically assigned [] if it does not already exist. You do not need to initialize it to [] unless you want to reset it.