which macro can i use to desicrib the density
 

when i use the model of "pdf" and "dpm" to simulate the combustion of the coal,which macro can i use to desicrib the density of the gas around the particle(coal).

when i use: real rho = Pdf_Density(real fmean, real fvar, real fmean2, real fvar2, real h, real *multiplier, real cmean, real scadis, int *limit); but the error appears:'Pdf_Density' : too few actual parameters.

Could please somebody help me.Will appreciate ur more of your help. Thanks for your time .

Re: which macro can i use to desicrib the density
 

help me .plz