Description Usage Arguments Value See Also Examples
Use these functions to transform x and y using the natural logarithm and calculate a linear model, plot the model and use it to calculate x-values from the model data and y-values (inverse function).
Those function are intended to be used in set_calc_concentrations /
sets_read to be applied to the calibrators (fit_lnln
) and interpolate
concentrations from the raw values (interpolate_lnln
). Use plot_lnln
to visually inspect goodness of fit.
fit_lnln
: Apply ln to x and y and calculate a linear model from x and y.
plot_lnln
: Draw the plot for the model that can be calculated with
fit_lnln
. Uses ggplot2::ggplot if available.
interpolate_lnln
: Inverse fit_lnln
using model
and calculate x
values from y values.
1 2 3 4 5 | fit_lnln(x, y)
plot_lnln(x, y)
interpolate_lnln(y, model)
|
x |
The x coordinates of the points. |
y |
The y coordinates of the points. |
model |
The line model. |
fit_lnln
: The model.
plot_lnln
: The plot.
interpolate_lnln
: The calculated x values.
set_calc_concentrations, sets_read, models_linear
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | # generate data
x <- c(2.718282, 20.085537, 54.598150, 1096.633158)
# x is known for these values
y_known <- c(33.11545, 665.14163, 2980.95799, 268337.28652)
# we will calculate x for those:
y_unknown <- c(148.4132, 13359.7268, 59874.1417)
model <- fit_lnln(x = x, y = y_known)
model
plot_lnln(x = x, y = y_known)
interpolate_lnln(y = y_unknown, model)
rm(x, y_known, y_unknown, model)
|
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