R: Plot a set of data in a Tk window and interactively move...
TkApprox
R Documentation
Plot a set of data in a Tk window and interactively move lines to
see predicted y-values corresponding to selected x-values.
Description
This function plots a dataset in a Tk window then places 3 lines on
the plot which show a predicted y value for the given x value. The
lines can be clicked on and dragged to new x-values with the predicted
y-values automatically updating. A table at the bottom of the graph
shows the differences between the pairs of x-values and y-values.
If True then the lines will snap to x-values (can be
changed with a checkbox in the Tk window)
digits
Number of significant digits to display (passed to
format)
cols
Vector of 3 colors, used for the reference lines
xlab
Label for x-axis
ylab
Label for y-axis
hscale
Horizontal Scale of the plot, passed to tkrplot
vscale
Vertical Scale of the plot, passed to tkrplot
wait
Should R wait for the window to be closed
...
Additional parameters passed to plot
Details
This provides an interactive way to explore predictions from a set of
x and y values. Internally the function approxfun is used to
make the predictions.
The x-value of the 3 reference lines can be changed by clicking and
dragging the line to a new position. The x and y values are shown in
the margins of the graph. Below the graph is a table with the
differences (absolute value) between the pairs of points.
This can be used to find peaks/valleys in trends and to see how they
differ from starting points, other peaks/valleys, etc..
Value
If wait is FALSE then an invisible NULL is returned, if
wait is TRUE then an invisible list with the x and y values of
the 3 reference lines is returned.