Sharp EL-9900 Error conditions during financial calculations, Distribution function

Appendix

2. Error conditions during financial calculations

•r ≤ -1

•N = 0 in PMT calculations

•I% = 0 and PMT = 0, or I% ≠ 0 and FV = (1/r) (1 + r ⋅ s) ⋅ PMT, in N calculations.

s= 1 (Pmt_Begin) s = 0 (Pmt_End)

In I% calculations

If PMT > 0:

Pmt_End mode: PV ≥ 0 and FV + PMT ≥ 0

PV < 0 and FV + PMT < 0

Pmt_Begin mode: PV + PMT ≥ 0 and FV ≥ 0

PV + PMT < 0 and FV < 0

If PMT < 0:

Pmt_End mode: PV > 0 and FV + PMT > 0

PV ≤ 0 and FV + PMT ≤ 0

Pmt_Begin mode: PV + PMT > 0 and FV > 0

PV + PMT ≤ 0 and FV ≤ 0

If PMT = 0: PV ÷ FV ≥ 0

•FV, N ⋅ PMT, PV ≥ 0 or FV, N ⋅ PMT, PV ≤ 0

•Irr calculation: all cash flows have the same sign.

3. Distribution function

1 pdfnorm(

	1	exp (–	(x – ∝)2
f (x) =			2σ2	)
	2π σ

2pdfT(

	Γ (df + 1) (1 +	x	2	)-	df + 1
					2
f (x) =	2	df
	Γ ( df )	πdf
	2

Calculation result→Xreg ∝: Mean

σ: Standard

deviation

However: Γ(s) = ∫ ∞0 xs–1e-xdx

Calculation result→Xreg

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