## Not sure how to use the disp function and num2str function from this point. Can someone help me out here?

on 4 Mar 2013

### Walter Roberson (view profile)

```The Richter scale is a measure of the intensity of an earthquake.  The energy E(in gigajoules) released by an earthquake is related to the magnitude M on the Richter scale as follows.
```
```E=(10^(-4.6))*(10^(1.5*M))
```
```program the formula for E in a script file.
```
```Use the input function to prompt the use to enter a value of M.  The prompt should say "Please enter a Value M on the Richter scale, then press enter".  use the disp function and the num2str function to display the numerical value of the energy E with the text "The energy released is:", followed by the value of E, followed by the text "Gigajoules."
```

So far I have

```M=input('Please Enter a Value of M on the Richter scale, then press enter')
E=(10^(-4.6))*(10^(1.5*M))
```

How do I do this problem from this point?

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### Walter Roberson (view profile)

on 4 Mar 2013

Hint:

```[ 'Pi r^', num2str(3) ]
```

### Image Analyst (view profile)

on 4 Mar 2013

You look up disp() and num2str() in the help, though personally I think fprintf() is a much better way to display things in the command window.

Brian

### Brian (view profile)

on 4 Mar 2013

I've done that, I'm just not sure how to use them in order to achieve my desired result.

Image Analyst

### Image Analyst (view profile)

on 4 Mar 2013

But we can't just give you the answer to your homework outright. The help should have examples you can adapt.

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