Class blog 2/13 - part 2

ECE 3340 - Han Q. Le (r)

Han Q Le (c) -copyrighted 

We talked in class about creating a function. We had a discussion of what can be input of a function? is it number? string? array? is there any limit to the type of array or array dimension?
The answer is that any computable object can be an input. Below is an example.

1. Object input of a function

Recall that we did this in Tutorial 2, and you should have a record of.

Now, we will make a function that uses the object above as input,

2. Making a function using Block or Module

First, let’s review basic steps to make a function. You should follow by typing line by line while trying to learn the structure of a Block function below.

2.1 Basic

You can use Block or Module for the basic structure below:

More specific

2.2 No need for input variables: prompt or does thing automatically

It is OK to have no input variable:

In[1]:=

In[2]:=

Out[2]=

In[1]:=

In[70]:=

2.3 Most useful functions need no input variables: it does thing automatically by looking for things, log-in etc.

3. A Block function that reads your record above

In[4]:=

In[1]:=

Now, go ahead and put in the data record you did for Tutorial 2. Below is an example.

In[3]:=

Out[4]=

Npw, see what the function we design does to the above object.

In[5]:=

Out[5]=

Another example

In[6]:=

Out[6]=

In[7]:=

Out[8]=

End

You are strongly encouraged to go through all the tutorials up to now. Send in questions if need help.