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Re: solve cubic polynomial for dummies? [message #88437 is a reply to message #88425]

Thu, 24 April 2014 13:30

mga1
Messages: 2
Registered: April 2014

Junior Member

Fantastic thanks. Final code used posted below. Ended up using cuberoot but fz_roots worked also:

pro cubesolve,coeff,y

coeff = [1.00000, -2.02300, 2.87770, -1.94410]

Y = [0, 0.95]

N_values=n_elements(y)

for i=0, N_values-1 do begin

val=y[i]
; c = coeff
; c[0] = coeff[0]-val
; roots = fz_roots(c,/double)
; print,roots

x = CUBEROOT([1.00000-val, -2.02300, 2.87770, -1.94410])

print, x

endfor

end

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[Message index]

		solve cubic polynomial for dummies? By: mga1 on Wed, 23 April 2014 14:26
		Re: solve cubic polynomial for dummies? By: wlandsman on Wed, 23 April 2014 16:39
		Re: solve cubic polynomial for dummies? By: mga1 on Thu, 24 April 2014 13:30

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