What is function for quantile regression in Matlab2018b?

Hi,

What is function for quantile regression in Matlab2018b?

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/32115-quantreg-x-y-tau-order-nboot is a user function. But see also

https://www.mathworks.com/help/stats/outlier-detection-using-quantile-regression.html

[Parthu P]

Hi Walter,

I have annual time series data. How could I draw multiple trend lines at different quartiles (0.25, 0.5, 0.75) of this data and obtain trend statistic for each line/quartile?

Here is example data:

Time Data

2004 2.075

2005 2.055

2006 2.015

2007 2.038

2008 2.302

2009 2.215

2010 2.154

2011 2.108

2012 2.369

2013 3.236

2014 3.46

2015 3.582

Thank you in advance.