# Linear and power regression

5 replies to this topic

### #1 DrCoyote

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Posted 04 November 2003 - 02:19 AM

Perhaps this is a stupid question, but I'm going to ask anyway.

At work I often have to use linear or power regression. Is there an easy way to get predicted values for the regression?

On my CFX-9850GB Plus, I used to:
1. Go to Stat from the Main Menu
2. Enter my data
3. Press CALC, then REG, then X (For linear regression)
4. Press Menu, 1 (for RUN), OPTN, STAT
5. Type in an x value and press predict y, or vice versa.
Pretty easy, once you got it down.

On my ClassPad, I have to:
1. From the Main Menu, touch Statistics
2. Enter my data
3. Touch Calc, Linear Reg
4. Choose my lists, and tell it to copy the formula to y1
5. Touch Menu, then Graph and Table
6. Copy the formula from y1
8. Type y=, then paste the formula
9. Use the solver to predict x or y values

Is that the easiest way, really?

### #2 CrimsonCasio

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Posted 04 November 2003 - 02:55 AM

I think you could make a program to do that on the classpad, the [cat] menu in the keyboard is a catalog of all the commands the classpad can do, if you refrence the manual a bit then you can find the sentax for the commands in the programming area and just write out the steps.

### #3 DrCoyote

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Posted 04 November 2003 - 03:30 AM

Yes, it looks like a program may be my best alternative. I just wanted to make sure I wasn't missing something obvious before I went through the trouble.

### #4 CrimsonCasio

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Posted 04 November 2003 - 03:36 AM

probably not, that generally what programs are for (though we try to make games).

### #5 DrCoyote

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Posted 04 November 2003 - 03:47 AM

Well, actually, I would think such functionality would be a basic thing. That's why I was amazed there wasn't an easier way built in.

### #6 CrimsonCasio

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Posted 04 November 2003 - 03:56 AM

well, the classpad wasnt meant to be a professional calculator, but rather a educational calculator. however the developers included a great deal of functionallity in the basic language so that you can make it do things you need it to even though it doesnt normally have that kind of feature. I think its exactly the oppisite on Hp models.

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