The Museum of HP Calculators

HP Forum Archive 17

 Substitude variables on a array of equations...Message #1 Posted by regisxp on 18 Apr 2007, 2:29 p.m. Hi all! I have a function that retuns me a array with two equations... Something like this: [x^2+y X^2-2y] Is there any way that i can use to substitute X and Y by real numbers, like; x=2 and y=1 And get an array with the responses: [5 2] Thanks a lot!!!

 Re: Substitude variables on a array of equations...Message #2 Posted by Vieira, L. C. (Brazil) on 18 Apr 2007, 8:06 p.m.,in response to message #1 by regisxp Hi; one of the simplest way would be creating the variables ´x´ and ´y´ then attributing them the values you want to. Consider this:```[x^2+y x^2-2y] [ENTER] 2 'x' [STO] 1 'y' [STO] [->NUM]``` Alternatively you can store the initial expression in a separate variable, say 'EQ1', with the following sequence: ```[x^2+y x^2-2y] 'EQ1' [STO] 2 'x' [STO] 1 'y' [STO] 'EQ1' [->NUM]```This way, you could attribute x and y other values, say 3 and 4, like this: ```3 'x' [STO] 4 'y' [STO] 'EQ1' [->NUM]``` There are other ways, for sure. This is one of them, though. Cheers. Luiz (Brazil) (PS: there may be errors, I have no calculator at hands, now...) Edited: 18 Apr 2007, 8:10 p.m.

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