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ncar (version 0.3.1)

Slope: Get the Slope of regression log(y) ~ x

Description

It calculates the slope with linear regression of log(y) ~ x

Usage

Slope(x, y)

Arguments

x
vector values of independent variable, usually time
y
vector values of dependent variable, usually concentration

Value

R2
R-squared
R2ADJ
adjusted R-squared
LAMZNPT
number of points used for slope
LAMZ
negative of slope, lambda_z
b0
intercept of regression line
CORRXY
correlation of log(y) and x
LAMZLL
earliest x for lambda_z
LAMZUL
last x for lambda_z
CLSTP
predicted y value at last point, predicted concentration for the last time point

Details

With time-concentration curve, you frequently need to estimate slope in log(concentration) ~ time. This function is usually called by BestSlope function and you seldom need to call this function directly.

See Also

BestSlope

Examples

Run this code
Slope(Indometh[Indometh$Subject==1, "time"],Indometh[Indometh$Subject==1, "conc"])

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