An open source application (written in Scilab) for the analysis of concentration profiles and times-series. It consists of several files that can be executed in Scilab and that provide functions listed below:
Note: The mprplotter program was written to make the viewing and analysis of profiles and time-series faster, more convenient and (to some extend) standardized. You can, naturally, use any other program. This program was written basically because many users may find the “excel-spreadsheet-approach” rather cumbersome, and especially unsuitable for large data-sets. Thus, one will probably appreciate the real power of the program only when dealing with large data-sets, because one may initially get an impression that plotting and analyzing only a few profiles could be done much faster in spreadsheet programs such as excel.
getdSdz.sci allows rapid analysis of mpr files (e.g., those generated by m-Profiler or the conversion utilities listed here), including profile visualization and calculation of spatial gradients, fluxes and areal contents, as shown in this schematic diagram and instructed below:
1, 3, 4, 5, then choose Profiles→Specify and set range to
[1,3:5], which is the Scilab syntax for 1, 3, 4, 5. After the profiles have been displayed, place the legend with the times at which the profiles were taken somewhere in the graph window.
Once a profile or several profiles are displayed, and the diffusion coefficient is defined, the fluxes and areal contents are calculated as follows.
As of version 1.02 of mprplotter, the calculation of depth profiles of fluxes and volumetric rates for individual profiles is done through the menu
Calculation → Calculate rates (R(z) = -D d^2c/dz^2) for all depths.
Parameters required for successful execution of this feature are defined through the menu
Settings → Calculation settings. Read the older version of the calfluxrate manual to get an idea about the algorithm used and the meaning of the parameters.
getdSdt.sci allows rapid analysis of dat files (e.g., those generated by m-Profiler, DAQ-server or the conversion utilities listed here), including time-series visualization and calculation of rates of change, as shown in this schematic diagram and instructed below:
Once the time-series are displayed, the rates of change in the analyte concentration with time are calculated as follows.
Choose Save→Export all profiles for L@MP in the mprplotter/getdSdz GUI window to export all profiles in the format ready for the analysis using L@MP.
Download the Scilab source files from the Download center.