# Interpolation

5 replies to this topic

### #1 RJPedro

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Posted 07 February 2009 - 01:19 PM

Hello Iâm a Portuguese Civil Engineering student , I bought a classpad 300 but I havenât been able to do interpolation like I used to on FX880-P can anyone help me ???

Best Regards

RJP

### #2 Gualberto Soto Sivila

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Posted 07 February 2009 - 04:45 PM

Hello Iâm a Portuguese Civil Engineering student , I bought a classpad 300 but I havenât been able to do interpolation like I used to on FX880-P can anyone help me ???

Best Regards

RJP

### #3 Behnoud

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Posted 07 February 2009 - 06:29 PM

If these points are known (x1,y1), (x2,y2) and you also know y of third point and you are going to find x of third point do this in main:
Solve((x-x1)/(x1-x2)=(y-y1)/(y1-y2),x)

If these points are known (x1,y1), (x2,y2) and you also know x of third point and you are going to find y of third point do this in main:
Solve((x-x1)/(x1-x2)=(y-y1)/(y1-y2),y)

### #4 afshin_electronic

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Posted 08 February 2009 - 08:26 AM

what you said is doing it using Line Equation ...
if there were more than two points which were not aligned in a line, then what should we do ?

### #5 Behnoud

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Posted 08 February 2009 - 05:39 PM

You are right.
I don't remember exactly but in Static App you can enter your Xs and Ys then find a linear regression and solving it for unknown x or y.

### #6 DrCoyote

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Posted 09 February 2009 - 01:48 PM

Have a look at this topic:

http://www.casiocalc...?showtopic=4196

It has a discussion on different ways of accomplishing what you want to do.

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