Slope of the mass functions is compared with the minimum mass for different high mass star forming samples from Table 5: cores within IRDCs are indicated as black point, clumps within IRDCs as purple point, IRDCs as green point, 1.2 mm dust clumps as blue point, clumps within GRS molecular clouds and W49 as light blue points, ATLASGAL sources as black triangle, M17, NGC 7538, Cygnus X, and NGC 6334 as red triangles.