Installation | Syntax | Examples | Feedback | Change log

splinefit v1.1

(02 May 2024)

Installation

The package can be installed via SSC or GitHub. The GitHub version, might be more recent due to bug fixes, feature updates etc, and may contain syntax improvements and changes in default values. See version numbers below. Eventually the GitHub version is published on SSC.

SSC (v1.1):

ssc install splinefit, replace

GitHub (v1.1):

net install splinefit, from("https://raw.githubusercontent.com/asjadnaqvi/stata-splinefit/main/installation/") replace

If you want to make a clean figure, then it is advisable to load a clean scheme. These are several available and I personally use the following:

ssc install schemepack, replace
set scheme white_tableau

You can also push the scheme directly into the graph using the scheme(schemename) option. See the help file for details or the example below.

I also prefer narrow fonts in figures with long labels. You can change this as follows:

graph set window fontface "Arial Narrow"

Syntax

The syntax for the lastest version is as follows:

splinefit y x [if] [in], 
                [ smooth(0-1)points(num) close lwidth(str) lcolor(str) lpattern(str) msymbol(str) msize(str) 
                  mcolor(str) mlabel(str) mlabposition(str) mlabsize(str) * ]

See the help file help splinefit for details.

Examples

Get the example data from GitHub:

set obs 10

gen id = _n
gen x = .
gen y = .

set seed 2024
replace x = runiformint(-10,10)
replace y = runiformint(-10,10)

splinefit y x

splinefit y x, close

Smoothing

splinefit y x, close smooth(0)

splinefit y x, close smooth(0.2)

splinefit y x, close smooth(1)

Additional options

splinefit y x, smooth(0.5) lc(gs12) lw(0.2) lp(dash) mc(red) ms(1.2) legend(off) mlab(id) close

Feedback

Please open an issue to report errors, feature enhancements, and/or other requests.

Change log

v1.1 (02 May 2024)

Improved version with more options.

v1.0 (01 Aug 2023)

Public release of the beta.