Interpol function

Interpolate y value

It interpolates y value when a corresponding x value (xnew) does not exist within x vector

Interpol(x, y, xnew, Slope, b0, down = "Linear")

Arguments

• x: vector values of x-axis, usually time
• y: vector values of y-axis, usually concentration
• xnew: new x point to be interpolated, usually new time point
• Slope: slope of regression log(y) ~ x
• b0: y value of just left point of xnew
• down: either of "Linear" or "Log" to indicate the way to interpolate

Details

This function interpolate y value, if xnew is not in x vector. If xnew is in x vector, it just returns the given x and y vector. This function usually is called by IntAUC function Returned vector is sorted in the order of increasing x values.

Returns

new x and y vector containing xnew and ynew point

Author(s)

Kyun-Seop Bae k@acr.kr

See Also

IntAUC

Examples

x = 10:1 + 0.1
y = -2*x + 40.2
Interpol(x, y, 1.5)
Interpol(x, y, 1.5, down="Log")