GRASS Programmer's Manual
6.4.2(2012)
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00001 #include <grass/gis.h> 00002 00003 void c_count(DCELL * result, DCELL * values, int n, const void *closure) 00004 { 00005 int count; 00006 int i; 00007 00008 count = 0; 00009 00010 for (i = 0; i < n; i++) 00011 if (!G_is_d_null_value(&values[i])) 00012 count++; 00013 00014 *result = count; 00015 } 00016 00017 void w_count(DCELL * result, DCELL(*values)[2], int n, const void *closure) 00018 { 00019 DCELL count; 00020 int i; 00021 00022 count = 0.0; 00023 00024 for (i = 0; i < n; i++) 00025 if (!G_is_d_null_value(&values[i][0])) 00026 count += values[i][1]; 00027 00028 *result = count; 00029 }