View source: R/compute_model_prediction.R
compute_model_prediction | R Documentation |
Fit a 1d model, then compute predictions and (optionally) standard errors over an evenly spaced grid.
compute_model_prediction(
x,
formula,
...,
model = NULL,
se = FALSE,
level = 0.95,
n = 80L,
domain = NULL,
method
)
compute_smooth(x, formula, ..., span = 0.75, se = FALSE)
x |
Dataset-like object to model and predict. Built-in methods for data frames, grouped data frames and ggvis visualisations. |
formula |
Formula passed to modelling function. Can use any variables from data. |
... |
arguments passed on to |
model |
Model fitting function to use - it must support R's standard
modelling interface, taking a formula and data frame as input, and
returning predictions with |
se |
include standard errors in output? Requires appropriate method of
|
level |
the confidence level of the standard errors. |
n |
the number of grid points to use in the prediction |
domain |
If |
method |
Deprecated. Please use |
span |
Smoothing span used for loess model. |
compute_model_prediction
fits a model to the data and makes
predictions with it. compute_smooth
is a special case of model
predictions where the model is a smooth loess curve whose smoothness is
controlled by the span
parameter.
A data frame with columns:
resp_ |
regularly spaced grid
of |
pred_ |
predicted value from model |
pred_lwr_ and pred_upr_ |
upper and lower bounds of
confidence interval (if |
pred_se_ |
the
standard error (width of the confidence interval) (if |
# Use a small value of n for these examples
mtcars %>% compute_model_prediction(mpg ~ wt, n = 10)
mtcars %>% compute_model_prediction(mpg ~ wt, n = 10, se = TRUE)
mtcars %>% group_by(cyl) %>% compute_model_prediction(mpg ~ wt, n = 10)
# compute_smooth defaults to loess
mtcars %>% compute_smooth(mpg ~ wt)
# Override model to suppress message or change approach
mtcars %>% compute_model_prediction(mpg ~ wt, n = 10, model = "loess")
mtcars %>% compute_model_prediction(mpg ~ wt, n = 10, model = "lm")
# Set the domain manually
mtcars %>%
compute_model_prediction(mpg ~ wt, n = 20, model = "lm", domain = c(0, 8))
# Plot the results
mtcars %>% compute_model_prediction(mpg ~ wt) %>%
ggvis(~pred_, ~resp_) %>%
layer_paths()
mtcars %>% ggvis() %>%
compute_model_prediction(mpg ~ wt) %>%
layer_paths(~pred_, ~resp_)
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