Displaying 1 result from an estimated 1 matches for "callilng".
2007 May 11
1
conditional across frames of a data fram
...x y ... ...
... ... ... 115 127 ... ...
... ... ... 120 129 ... ...
... ... ... 0 0 ... ...
... ... ... 135 162 .... ...
ect...
i need to ask R tell me how many x-y pairs contain coords that are
non-zero and fall within values that i'm callilng xleft, xright, ybottom and
ytop and fall between certain indicies of the data frame.
i am calling the indexes by referring to numbers i have storied in other
variables. i am really looking for an efficient way to do this since when i
try to pull the x and y columns out and assign them to their own...