Need help with Matlab programming

Hello!

I'm an undergraduate student of Economics and am new to programming in Matlab in which I have to perform temporal disaggregation (convert low frequency data to high frequency) using the "Chow-Lin procedure".

I have found information on Chow-Lin on the Eurostat web page(pages 16 and 17):http://www.uni-mannheim.de/edz/pdf/eurostat/05/KS-DT-05-004-EN.pdf

The syntax is: res=chowlin(Y,x,ta,s,type)

Here is what I have managed to write so far (the vectors x and Y were copied from an Excel document):

x=[89.2000000000000;95.4000000000000;105.500000000000;99.8000000000000;110.400000000000;105.800000000000;109.500000000000;105.700000000000;109.400000000000;112.400000000000;111.400000000000;108.200000000000;97.1000000000000;101.300000000000;115.800000000000;108.900000000000;118;109.400000000000;117.300000000000;107.300000000000;110;116.900000000000;115.100000000000;107.800000000000;102.600000000000;108.800000000000;114;115.700000000000;114.100000000000;116.500000000000;119.400000000000;102;113.800000000000;117.200000000000;111.400000000000;105.500000000000;88;95.2000000000000;106.500000000000;107.500000000000;105.700000000000;100.400000000000;108.600000000000;93.5000000000000;102.900000000000;107.200000000000;101.900000000000;99.4000000000000;88;93.9000000000000;106.300000000000;101.500000000000;103.700000000000;98;105.100000000000;94.3000000000000;106.100000000000;100.800000000000;102.100000000000;100.300000000000;83.4000000000000;91.4000000000000;103;101.700000000000;104.800000000000;99.7000000000000;104.400000000000;90.1000000000000;103.600000000000;102.900000000000;101.800000000000;98.5000000000000;80.5000000000000;88.9000000000000;93.5000000000000;92.2000000000000;100.900000000000;92.8000000000000;100.200000000000;92.1000000000000;92.7000000000000;98.4000000000000;97.4000000000000;90.2000000000000;84.6000000000000;86.3000000000000;94.2000000000000;93.9000000000000;95.5000000000000;91.3000000000000;97.6000000000000;86.1000000000000;90.4000000000000;95.1000000000000;95.2000000000000;89;85.2000000000000;86.7000000000000;94.9000000000000;94.5000000000000;95.3000000000000;89.8000000000000;98.9000000000000;80.8000000000000;95.4000000000000;97.7000000000000;97.8000000000000;95.2000000000000];
Y=[66717.2054519922;73555.8556407072;80387.7354756599;73776.1932867567;73568.2226868528;80931.4658582527;87422.2226658697;80387.7284426743;80204.1077788367;87918.4262168586;94563.3051390650;84999.1626918795;76765.4265502817;83853.2540722711;88128.9922583043;82218.0773839729;75264.4048595781;81794.0205566458;88461.0780361331;82521.0167814730;76129.8232956418;83193.9397062192;90074.2673564622;83188.9473958569;75800.2856784779;82135.4343913346;89509.4168336043;83010.8252316233;75998.8711258359;82864.6410314047;89376.2478413685;81895.7052237878;75116.3041806252;81981.7668448407;89431.2658637777;82397.4239030707];
ta=1;
s=3;
type=1.

Since I'm stuck and do not know how to attain the final result, I would be grateful if You could make it work. Thank You in advance!

Answer 1

[Stephen23]

Some tips:

• A more reliable way to move data around would be to read the data directly from the Excel spreadsheet using xlsread.
• The chowlin function is not an inbuilt function, it has been written by a third-party. Either you can obtain this yourself from someone, or you can search for it on various online repositories. A good place to find third-party MTALAB code is MATLAB's own File Exchange. You can search for chowline there. Then you will need to download it and save it on the MATLAB search path.
• Third-party code is best supported by the code author, so please contact them if you have any questions. Hopefully they have provided complete working examples too!