The published files have extra extensions "txt" that makes them 
easier to read. However, the txt-extensions must be deleted 
before using the files as MatLab functions. 

SIGMA_plots7_KK.m is written for MatLab 7.1 environment 
and intended to use for visualizing SIGMA measurement data, 
saved as monthly files. 

To use program, first start MatLab development environment and
open the file SIGMA_plots7.m. Before running the program 
(running is initiated by pressing F5 key or choosing Debug -> Run),
make sure that data file is located in the same folder as the program. 
Then change data file name in program text (line 8) and day numbers 
(lines 9, 10). Reading time depends speed of your computer 
and sometimes it takes about one minute, so please wait.

The output plot is basically spectrogram where X-axis represents time 
and Y-axis particle diameter, concentration distribution dN/dlog(D) 
values are given by color code. Plot is also saved into program folder 
as .png picture file, for other formats, please study MatLab manual.

SIGMA_plots7_KK.m cannot be used with MatLab 6. 
User of MatLab 6 could use the function SIGMA_plots6_KK.m 
as a replacement. However, the quality of the output is 
a little reduced vhen using this version.