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./
hist_2d_w.pro
Routines
top source hist_2d_w
Image processing, statistics, probability
result = hist_2d_w(im1, im2, ww, MIN1=MIN1, MIN2=MIN2, MAX1=MAX1, MAX2=MAX2, BIN1=BIN1, BIN2=BIN2)
Return the density function (histogram) of two variables with weightings
Not usable with complex or string data.
Creates a combines array from the two variables, equal to the linear subscript in the resulting 2D histogram, then applies the standard histogram function.
Return value
The two dimensional density function of the two variables, a longword array of dimensions (m1, m2), where: m1 = Floor((max1-min1)/bin1) + 1 and m2 = Floor((max2-min2)/bin2) + 1 and Result(i,j) is equal to the number of sumultaneous occurences of an element of V1 falling in the ith bin, with the same element of V2 falling in the jth bin. Each occurences is multiplied by its respective weight value W.
Parameters
- im1
- im2
- ww
Keywords
- MIN1
- MIN2
- MAX1
- MAX2
- BIN1
- BIN2
Author information
- History:
Written by: DMS, Sept, 1992 Written DMS, Oct, 1995 Added MIN, MAX, BIN keywords following suggestion of Kevin Trupie, GSC, NASA/GSFC. CT, RSI, May 2001: Corrected MIN, MAX keywords so that the out-of-range values are ignored rather than truncated to be within range. Allow input arrays with negative values. BC, april 2005: added weight
Statistics
| Lines: | 44 lines |
| Cyclomatic complexity: | 15 |
| Modified cyclomatic complexity: | 15 |
File attributes
| Modification date: | Fri Jan 9 19:59:00 2015 |
| Lines: | 44 |
| Docformat: | idl verbatim |