Version 1.5.16

Fixed 'ofp' function calculation error. When input VOC concentration data in units of PPBV, and the ppbv is multiplied by the molecular mass by one more time during the function calculation (should be only one time).

Version 1.5.15

Update document of 'dm8n'.

Version 1.5.14

Update 'dm8n' which will output dma8 plot.

Version 1.5.13

Update 'dm8n' to fix bug 'no dot function'.

Version 1.5.11

Update 'trs' for et error.

Version 1.5.10

Update output of 'vocct' (MW_Result).

Version 1.5.9

Update documents of vocct, loh, and ofp to illustrate how to deal with m,p-xylene.

Version 1.5.8

Rename function 'unitv' into 'vocct'.

Version 1.5.7

Fix some cases where NA results were obtained for 'loh' and 'ofp'.
Remove results for concentration convertion in 'loh' and 'ofp'.
Add new function 'unitv' for convertion of unit of VOC concentrations.

Version 1.5.6

update trs (calculate time series according to time zone of timeseries, add parameter 'cpms' to compensate the insufficient amount of the millisecond bit for datetime, output data with datetime which has 'POSIXct' as coltype and has same time zone with input);
update ofp and loh to seperate m,p-Xylene into m-Xylene and p-Xylene equally.