m'  (position of the peak)

SD'  (standard deviation)

A'  (normalized peak height)

m  (position of the peak)

SD  (standard deviation)

A  (normalized peak height)

const  (y-offset)

You are not allowed to use such a value for this parameter.

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A parameter value cannot be above its upper limit.

A parameter value cannot be below its lower limit.







Spline Data

Y column

X column

Data Window

$BSelect data$(cubic spline)

A smooth function going through the current data points.

Spline

Bad x-value for the spline function.

Not enough data for spline interpolation.

n  (exponent)

x0  (x-offset)

m  (multiplicative factor)

const  (y-offset)

n: integer or real value

y = const + m*(x-x0)^n

Power

       + A' (2 Pi)^(-1/2) exp(-(x-m')^^22/(2 SD'))

y = const + A (2 Pi)^(-1/2) exp(-(x-m)^^22/(2 SD))

Gauss

m'  (position of the peak)

K'  (sharpness of the peak)

A'  (height of the peak)

m  (position of the peak)

K  (sharpness of the peak)

A  (height of the peak)

const  (y-offset)

    + A'/(1+K'*(x-m')^^22

y = const + A/(1+K*(x-m)^^22)

Lorentz

base  (base^y=x defines y=log(x))

const  (y-offset)

x0  (x-offset)

K

A  (multiplicative factor)

base: base of logarithm

y=A * log(K*(x-x0)) + const

Log

const  (y-offset)

t0  (time-constant)

x0  (x-offset)

A  (multiplicative factor)

exponential function

y = A * exp(-(x-x0)/t0)  + const

Exp

const  (y-offset)

x0  (x-offset)

K  (frequency)

A  (amplitude)

harmonic oscillation

y = A * sin(K*(x-x0)) + const

Sin

Polynom

deg: degree of the polynomial

f(x) = const + a1*x +...+ a^0*x^^3

f(x) = const + a1*x + a2*x^^22

f(x) = const + a1*x

f(x) = const

const  (y-offset)

deg  (degree of the polynomial)